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Sunny Boy 5000US, 6000US, 7000US

Contents

1. 63 DC Connection With Additional DC 68 Communication Wiring 70 RS485 Communication vto ian Dyed ag 70 Closing the Sunny 73 Closing the SMA DC Disconnect if applicable 75 COMMISSIONING s soss assat see ens aloe 76 Displays and 78 LED Operation 79 LED ae Cin 82 Status Messages on the LCD Display 86 LCD Display Language 88 Communication Options 89 Measuring Channels and Parameters 90 Measuring Channels a aa 90 Operating Modes ooh tec eb d etes e 91 Sunny Boy Operating 92 96 Generali ari oon Medo tb 00 96 Error Messages 97 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG 9 Maintenance i i sr ease a ie ass 100 9 Cleaning the Fans sisse d E EE SER ed d diede 100 9 2 Cleaning the Handle 101 9 3 Testing the 102 9 4 Exchanging the
2. Installation Guide SB50US 70US IUSO90523 41 Wiring the Sunny Boy SMA Solar Technology AG 5 1 2 Wiring with SMA DC Disconnect N WARNING Always connect the wires to the Sunny Boy in the following sequence 1 Deeenergize all energy sources by opening all AC and DC switch disconnects and or breakers 2 Wiring from the AC breaker to the SMA DC Disconnect follow the procedure on page 53 et seq 3 AC wiring from the SMA DC Disconnect to the Sunny Boy follow the procedure on page 53 et seq 4 Wiring from the PV array to the SMA DC Disconnect follow the procedure on page 63 et seq 5 DC wiring from the SMA DC Disconnect to the Sunny Boy follow the procedure on page 63 et seq Switch the SMA DC Disconnect to the 1 position Turn the AC breaker ON To disconnect the Sunny Boy first turn OFF all AC disconnects and turn the SMA DC Disconnect to the O position The AC system should always be disconnected before the DC system After the Sunny Boy is de energized disconnect the wiring in the reverse order from above N WARNING Always wait a minimum of 5 minutes for stored potentials in the Sunny Boy to discharge completely before opening the enclosure N WARNING All electrical installations must be done in accordance with all local electrical codes and the National Electrical Code NEC ANSI NFPA 70 708 WARNING Before connecting the Sunny Boy to the electrical uti
3. 103 9 4 1 Exchanging the GFDI Fuse within the Sunny Boy 103 9 4 2 Exchanging the PV String Fuses within the SMA DC Disconnect 104 10 Technical 106 IO T Compliance Information 106 10 2 Sunny Boy Wiring 107 10 2 1 Without SMA DC Disconnect 0 eee eee e 107 10 2 2 With SMA DC Disconnect 0 eee eee e 108 10 3 5 Te Ea Ca 109 108 Saleh acl secant striae aee c eS Led RE 109 10 3 2 SMA DG Disconneet conss ver etd aoe ae Seals 111 10 4 Trip Limits 112 10 5 Torque Values and Wire Sizes 113 Installation Guide SB50US 70US 1US090523 9 SB50US 70US 1US090523 SMA Solar Technology AG Installation Guide SMA Solar Technology AG Introduction 1 Introduction This installation guide provides all the information needed to install commission and operate a Sunny Boy SB 5000US SB 6000US SB 7000US grid tied photovoltaic PV inverter 7 Information To help avoid problems during the installation familiarize yourself with the installation process by reading the entire Installation Guide before starting the installation N WARNING Lethal voltages are present at various points in a PV system For safety reasons it is recommended
4. 33 Mounting the SMA DC Disconnect if applicable 36 Mounting the Sunny 37 Wiring the Sunny 39 Sequence 41 Wiring without SMA 41 Wiring with SMA DC Disconnect 0 42 Bottom View and 43 Opening the Sunny 43 Opening the SMA DC Disconnect if applicable 44 Installation Guide SB50US 70US IUSO90523 7 Table of Contents SMA Solar Technology AG 5 5 5 5 1 5 5 2 5 5 3 5 6 5 6 1 5 7 5 8 5 8 1 5 8 2 5 8 3 5 9 5 9 1 5 10 5 11 7 1 7 2 7 3 7 3 1 7 4 7 5 7 5 1 7 5 2 7 5 3 8 1 8 2 Wiring the AC Output coprire aan cn tls Got 45 AC Connection Requirements 45 AC Wiring Without SMA DC Disconnect 50 AC Wiring With SMA 53 Wiring the DC 1 57 DC Connection Requirements 58 DC Input Grounding 59 Connecting the DC Wires 60 DC Wiring Without SMA DC Disconnect 61 DC Wiring With SMA
5. 58 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 7 DC Input Grounding The Sunny Boy comes from the factory configured for negative ground systems Certain types of PV modules may require that the positive terminal be grounded instead of the negative terminal To configure the Sunny Boy for positive ground move the fuse 1 and change the jumper position 2 as shown in the following illustrations Figure 5 14 GFDI Fuse and Jumper Settings for Positive Ground Installation Guide SB50US 70US 1US090523 59 Wiring the Sunny Boy SMA Solar Technology AG 5 8 Connecting the DC Wires N WARNING You must connect the wires that carry the DC voltage from the PV array to the Sunny Boy in the order described in the following procedure Deviating from this procedure could expose you to lethal voltages that can cause serious injury and or death N WARNING PV arrays are energized when exposed to light Use safe working practices when working on PV arrays N WARNING Always turn OFF all AC and DC breakers and switches in the PV system and wait a minimum of 5 minutes for the Sunny Boy to completely discharge before connecting any wires to the Sunny Boy or disconnecting any wires from the Sunny Boy Failure to do so could expose yov to lethal voltages that can cause serious injury and or death N CAUTION Verify the polarity and the open circuit v
6. N PV UNGROUNDED 208 240 or 277 V AC L1 60 Hz System L2 PV GROUNDED Figure 5 12 Simplified Electrical Wiring Diagram of a PV System Installation Guide SB50US 70US IUSO90523 57 Wiring the Sunny Boy SMA Solar Technology AG 5 6 1 DC Connection Requirements N WARNING All electrical installations must be done in accordance with all local electrical codes and with the National Electrical Code NEC ANSI NFPA 70 For installation in Canada the installations must be done in accordance with applicable Canadian standards N WARNING Use 10 AWG to 6 AWG 90 194 F copper wire for all DC wiring connections to the Sunny Boy Voltage drop and other considerations may dictate that larger size wires be used Use only solid or stranded wire but not fine stranded wire N WARNING The DC disconnect for the inverter must have a minimum rating of 600 V DC and 36 A continuous The SMA DC disconnect is shipped with 4 15 A 600Vdc fuses one for each string See Exchanging the PV String Fuses within the SMA DC Disconnect on page 104 for detoils i Information Use the online SMA string size calculator at www sma america com to determine the correct string configuration To navigate to the string size calculator click on the shortcut on the home page i Information Series fusing may be required depending on the type of PV module used in the system See NEC 690 9
7. Sunny WebBox The Sunny WebBoxis a link between the PV plant and the operator or owner The direct connection to the Sunny Portal via internet gives you entirely new possibilities for data acquisition and evaluation as well as the visualization on a PC with an internet browser No additional software needs to be installed Sunny SensorBox The Sunny SensorBox is a useful extension for the Sunny Webbox which can monitor weather conditions It is equipped with an integrated insolation and temperature sensor and can be connected to numerous additional sensors for the measurement of module temperature ambient temperature wind speed humidity and more Sunny Portal The Sunny Portal is a high performance interface from SMA for the monitoring and presentation of your system on the Internet Details can be obtained directly from www SUNNY PORTAL com For more information and assistance in choosing the right data option for your system please visit the SMA America web site Installation Guide SB50US 70US 1US090523 89 Displays and Messages SMA Solar Technology AG 7 5 Measuring Channels and Parameters The communication options support a number of measuring channels and messages from the Sunny Boy inverters The following abbreviations are used BFR Betriebsf hrungsrechner Sequential Control System SRR Stromregelungsrechner Current Control System The BFR and SRR are redundant processor control systems for the utility prot
8. Troubleshoot the PV array for ground faults prior to replacing this fuse N CAUTION For continued protection against the risk of fire replace the GFDI fuse with fuses of the same type and rating only The Sunny Boy is shipped with a Littelfuse KLKD 1 Amp 600V AC DC type fuse 82 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Displays and Messages Control System Fault EL m Yellow LED is on The yellow LED remains lit The Sunny Boy has detected a fault within the internal monitoring systems When the inverter detects a fault of this kind it will no longer connect to the utility grid To correct this the inverter must be serviced by a qualified service technician Contact SMA America for assistance Grid Failure Yellow LED is striking 2 times in short intervals y 0 5s 3s dis Ts The signal is repeated 3 times and then starts from the beginning The yellow LED is on for 5 seconds out for 3 seconds and then blinks twice The code is repeated 3 times This code sequence will repeat as long as there is a grid fault condition This code can be caused by any of the following conditions e Low Grid Voltage Vac Min High Grid Voltage gt Vac Max e Low Grid Frequency lt fac Min High Grid Frequency gt fac Rapid change in grid frequency or voltage Check the condition of the grid at the AC terminal blocks within th
9. 4 3 2 Mounting the SMA DC Disconnect if applicable a ic Figure 4 8 Mounting the SMA DC Disconnect Attach the SMA DC Disconnect to the two lower holes of the wall mounting bracket using two M6 x 10 screws and washers provided The teeth of the washers should face towards the wall in order to ensure proper grounding Tighten the screw to a torque of 44 in lb 5 Nm 36 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Mounting 4 3 3 Mounting the Sunny Boy 2 3 i ie 1 ESS n LI Figure 4 9 Mounting the Sunny Boy Use the following procedure to mount the Sunny Boy 1 Carefully lift the Sunny Boy onto the wall mounting bracket Hook the Sunny Boy using the enclosure opening in the back plate into the wall bracket see 1 in Figure 4 9 N WARNING The Sunny Boy weighs 145 Ib 65 kg To avoid injury be sure to use proper lifting techniques and secure the help of someone to assist in the unpacking and installation of the inverter Inspect the Sunny Boy from both sides to ensure that it sits centered on the wall bracket Attach the Sunny Boy to the mounting bracket with the two M screws and washers provided through holes next to the fan outputs on both sides of the Sunny Boy see 2 in Figure 4 9 The teeth of the washers should face towards the wall in order to ensure proper grounding Tighten the screws to a torque of 44 indb 5 Nm 4 Close t
10. 9 Maintenance The Sunny Boy is designed to provide many years of trouble free service Performing regular maintenance will help ensure the long life and high efficiency of your system 9 1 Cleaning the Fans The fan intakes and handle covers should be cleaned periodically with a vacuum cleaner Do not blow air into the fan areas For deeper cleanings the fans can be removed completely The Sunny Boy is fitted with two fans on its underside In order to clean the fans proceed as follows 1 Turn off all DC and AC disconnects and wait for 5 minutes for any residual voltages to dissipate 2 Disconnect the Sunny Boy from both the DC and AC connections paying attention to the safety instructions in Section 5 Wiring the Sunny Boy page 39 3 Wait for the fans to stop rotating Push the 2 latches at the top of the black plastic cover to one side and remove it carefully with the fan grates mounted behind 5 The fans themselves are fastened with 3 plastic latches Unhook the latches and remove the fans by pulling them downwards slowly and carefully The fan cables are long enough that you can move the fans far enough out to disconnect the internal plug in the Sunny Boy To do so unlock the corresponding plugs and remove them You can now take out the fans and clean them 6 clean the fans use a soft brush or cloth Do not use air pressure for cleaning the fans This will damage the fans 7 When the fans are cle
11. O 200000 Installer Total operating hours of the inverter Changing the value can be necessary when a Sunny Boy is exchanged and you wish to match the previously acquired data Memory Function no function Default param Reset Op Data Reset errors no function Installer Default param Sets all parameters to default Reset Op Data Sets all parameters that are visible in user level to default values Reset errors Resets all permanent device disable errors Operating Mode MPP Operation Turbine V const Stop MPP Installer Operating Modes of the Sunny Boy MPP Operation Sets the Sunny Boy in Maximum Power Point Tracking Mode V const Constant Voltage Mode Setpoint defined in Vconst Setval Turbine Operating mode for wind power plants Stop Disconnection from utility no operation T Max Fan 0 100 90 Installer Temperature for maximum fan rotation speed T Start 5 1600 Installer The time the inverter waits to connect to the grid after Vpv Start is exceeded This value defaults to 5 minutes after a utility fault T Start Fan 0 100 70 Installer Fan turn on temperature at minimum rotating speed Installation Guide SB50US 70US IUSO90523 93 Displays and Messages SMA Solar Technology AG Name T Stop Unit Range 1 1800 Default Password Level In
12. e Check and record the exact Mode and or Error messages on the LCD display or other communication system available Take appropriate action to correct the issue Ifnecessary check the DC and AC voltages at terminals inside the inverter Be sure to observe all of the safety precautions listed throughout this manual when doing so or hire a qualified professional e If the system problem persists contact SMA America technical support at 916 625 0870 In order to better assist you when contacting SMA America please provide the following information This information is required for service assistance Information Regarding the Sunny Boy e Serial number e Model Number e Short description of the problem Blinking Code or display message e What error code is indicated Provided a communication option is installed e AC line voltage e DC line voltage e Check GFDI Fuse e Can you reproduce the failure If yes how e Hasthis problem occurred in the past e What were the ambient conditions when the problem occurred Information Regarding the PV modules Manufacturer name and model number of the PV module Output power of the module e Open circuit voltage Voc of the module Number of modules in each string 96 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Troubleshooting If it becomes necessary to send the Sunny Boy back to the manufacturer for service please ship it in the or
13. 5 8 and Figure 5 9 on page 51 for steps 8 through 10 N CAUTION Avoid using wire nuts to join any wires together or to make any connections anywhere in the PV system Wire nuts are a frequent cause of unreliable resistive connections and ground faults Connect the AC equipment ground wire to the PE terminal labeled in the Sunny Boy 9 For 208 240 277 V connect the L1 AC line 1 or UNGROUNDED wire to the terminal labeled L1 in the Sunny Boy For 208 240 V connect the L2 AC line 2 and N AC line N wire to the terminal labeled L2 and N in the Sunny Boy For 277 V connect the N AC line N wire to the terminal labeled N in the Sunny Boy Note For 277 V the L2 terminal is not used 50 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy d Information The terminal must be opened completely before you insert the cable 11 Connectthe wires to the terminal blocks in the Sunny Boy and tighten them Torques for AC connection terminal blocks Grey Terminal Blocks Weidm ller 6 10 AWG 18 indb 2 Nm Green Terminal Blocks Phoenix 6 8 AWG 40 in lb 4 5 Nm 10 AWG 22 indb 2 5 Nm 12 Verify that all connections are correctly wired and properly torqued Pull on the cable in order to make sure that it is sufficiently fixed in the terminal L1 wire connected to L1 terminal N wire connected to N t
14. AWG DC Disconnect Terminal Terminal Grounding Electrode 15 1 7 6 10 AWG Conductor Terminal Block SMA DC Disconnect M x 10 screws for fastening 44 5 the Sunny Boy and the SMA DC Disconnect to the wall mounting bracket and closing the SMA DC Disconnect cover M x 16 Cover Screws 53 6 Installation Guide SB50US 70US 1US090523 113 Technical Specifications SMA Solar Technology AG 114 SB50US 70US 1US090523 Installation Guide SMA America Incorporated 4031 Alvis Court Rocklin CA 95677 4011 Tel 916 625 0870 Fax 916 625 0871 info sma america com
15. Blocks Weidmiiller 6 10 AWG 18 indb 2 Nm Green Terminal Blocks Phoenix 6 8 AWG 40 in lb 4 5 Nm AWG 22 inJb 2 5 Nm 11 Verify that all connections are correctly wired and properly torqued Installation Guide SB50US 70US 1US090523 67 Wiring the Sunny Boy SMA Solar Technology AG 5 8 3 DC Connection With Additional DC Distribution Using Spring Terminal Labeled Combined ume me ge 1 Insert the screwdriver into the provided slot of the spring terminal Push the screwdriver up the spring terminal is opened Insert the stripped cable into the spring terminal Return the screwdriver to its original position Gi d Co de Remove the screwdriver The spring terminal is closed and the cable is fastened DC Connection With Additional DC Distribution Negative Grounding l Connect the positive DC wire to the terminal labeled Positive DC wire COMBINED in the SMA DC Disconnect 2 Connect the negative DC wire to the terminal labeled PV GROUNDED in the SMA DC Disconnect 3 Torque all wires in the terminal blocks inside the SMA DC Disconnect to 15 inb 1 7 Nm 68 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy DC Connection With Additional DC Distribution Positive Grounding l Connect the negative DC wire to the terminal labeled COMBINED in the SMA DC Disconnect Negative DC wire 2 Connect the positive DC wire to
16. Sunny Boy products High efficiency e Quiet operation e Simple installation Powder coated die cast enclosure Operating Temperature The Sunny Boy has been designed to maintain full power output at ambient temperatures as high as 113 F Fan cooling allows this level of output power to be achieved even in enclosed spaces The Sunny Boy will continue to operate well beyond 113 F and de rates as needed to maintain a safe internal component temperature 14 SB50US 70USUS090523 Installation Guide SMA Solar Technology AG Introduction 1 3 Installation Overview This section provides a high level overview of the installation process so you have an idea what to expect as you proceed through the rest of the Installation Guide The installation process is broken down into the following tasks Section 2 Unpacking and Inspection This section provides instructions and information for unpacking the Sunny Boy and inspecting it for shipping damage Section 3 AC Voltage Configuration This section includes information on removing the cover locating primary components within the inverter and selecting the appropriate voltage configuration for the installation Section 4 Mounting This section includes guidelines to help you select the best mounting location suggestions to insure optimum performance cautions and warnings that you should follow to avoid injury and or equipment damage and step by step instructions for mounting the Sunny
17. before replacing the fuse Disturbance Grid Timeout Grid Fault S The type of grid could not be detected 208 240 277 V In case you are connecting to the 277 V grid check up if the cables for L1 and N are in the correct position Installation Guide SB50US 70US IUSO90523 97 Troubleshooting SMA Solar Technology AG Error Type Disturbance Error Code Imax Description Over current on the AC side This failure code is indicated in case the current to the AC grid exceeds the specification This may happen in case of harmfull interference on the grid If you observe Imax often check your grid For assistance contact SMA Disturbance K1 Close Error K1 Open K2 Open Relay test failed Contact SMA for assistance Disturbance MSD FAC MSD Idif Internal measurement comparison error The Sunny Boy measured values of BFR and SRR are E MSD VAC os y too different from each other Contact SMA for assistance Disturbance OFFSET Grid monitoring self test failed Error ROM The internal test of the Sunny Boy control system firmware failed Contact SMA in case you observe this failure often Disturbance Shut Down Internal over current continuous Disturbance Vac Bfr Vac Srr The AC grid voltage is exceeding the allowable range Bfr or Srr is an internal message and is not important for the user Vac can also result from a disconnected g
18. cover to ensure it is undamaged and in the correct position 4 Carefully position the cover on the front of the Sunny Boy so that the six holes in the cover are aligned correctly with the six threaded holes in the case 1 Information s S 4 ea Be sure when reinstalling the six screws that the lock washers are installed correctly The teeth of the washers should face towards the LID Installation Guide SB50US 70US IUSO90523 73 Wiring the Sunny Boy 74 While holding the cover in place carefully insert the six screws with lock washers through the holes in the cover into the threaded holes in the case and turn them until they are finger tight Be careful not to crossthread any of the screws Do not use power tools to start the screws Verify that the cover is in the correct position and that the seal is in place between the case and the cover Tighten the cover screws to a torque of 53 in lbs 6 Nm SB50US 70US IUSO90523 SMA Solar Technology AG Ps 22 3 F 3 o7 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 11 Closing the SMA DC Disconnect if applicable 1 2 Make sure the string fuses are securely mounted Position the cover onto the SMA DC Disconnect and insert the switch handle into the cover Turn the switch to the O position and tighten the screw on the right side of the switch with a small phillips screwdriver used screw UNC no 5 x
19. not avoided could result in death or serious injury N CAUTION CAUTION indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE NOTICE indicates a situation that can result in property damage if not avoided 4 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Other Symbols In addition to the safety and hazard symbols described on the previous pages the following symbol is also used in this Installation Guide d Information This symbol accompanies notes that call attention to supplementary information that you should know and use to ensure optimal operation of the system General Warnings N General Warnings All electrical installations must be done in accordance with the local and National Electrical Code ANSI NFPA 70 The Sunny Boy contains no user serviceable parts except for the fans on the bottom of the enclosure and the filters behind the fans as well as the handle covers on the sides of the unit For all repair and maintenance always return the unit to an authorized SMA Service Center Before installing or using the Sunny Boy read all of the instructions cautions and warnings on the Sunny Boy the PV array in this Installation Guide Before connecting the Sunny Boy to the electrical utility grid contact the local utility company This connection must be made only by qualified personnel PV arrays produce electric
20. parameter Fan Test to 1 with Sunny Data Sunny Data Control or with the data logger Sunny Boy Control or Turn off the inverter by turning off all DC and AC disconnects and wait 5 minutes for any residual voltages to dissipate e Once the LED s are off remove the cover and set the jumpers as shown in Figure 9 1 Turn on the inverter by turning on the AC disconnect and then the DC disconnect or switch the SMA DC Disconnect to the 1 position ages Jumper Position for verifiying the operation of the fans Figure 9 1 Jumper Position for Fan Test 102 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Maintenance 9 4 Exchanging the Fuses 9 4 1 Exchanging the GFDI Fuse within the Sunny Boy Turn OFF all AC and DC switches and or breakers 2 Wait for at least 5 minutes 3 Open the Sunny Boy as described in section 3 1 Opening the Sunny Boy page 18 4 Exchange the fuse 20 i 000 Figure 9 2 Position of GFDI Fuse within the Sunny Boy AN WARNING For continued protection against risk of fire replace only with the same type and ratings of fuse 600 VDC 1 AJ d Information Ensure that the fuse is completely inserted in the clamp 5 Close the Sunny Boy
21. that only qualified personnel install and operate this equipment Installation Guide SB50US 70US IUSO90523 11 Introduction SMA Solar Technology AG 1 1 Product overview The Sunny Boy is a DC to AC grid tied utility interactive inverter for use with photovoltaic PV fuel cell wind turbine and other sources of DC power In general the Sunny Boy takes power from a DC source PV modules and converts it to AC power for the utility grid This power is delivered first to local loads household appliances lights motor loads etc with any excess power fed to the utility The power consumed by the local loads reduces the power needed from the utility Excess power may actually spin the utility meter backwards depending on the type of meter in your system This power may also be recorded as power credits by the utility company depending on the interconnection agreement An example of basic system components is shown in Figure 1 1 Sunny Boy PV Array lt 3 Meter Utility Grid Figure 1 1 Sunny Boy Installed in a Utility Interactive PV System d Information Policies vary from one utility company to another Consult with a representative of the local utility company before designing and installing a PV system 12 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Introduction 1 2 Safety Anti Islanding Protection Islanding is a condition that can occur if the utility grid is disconnected while
22. the Sunny Boy is operating and the remaining load is resonant at 60 Hz and matches the output of the Sunny Boy perfectly This condition is highly unlikely and had never been witnessed outside of a controlled laboratory Nevertheless the Sunny Boy incorporates an advanced active islanding protection algorithm to ensure that the system will not export power into a balanced 60 Hz resonant load while the utility is disconnected The Sunny Boy periodically injects both leading and lagging reactive current into the utility grid This method has been proven by Underwriters Laboratories to effectively destabilize and disconnect from a balanced island condition PV Ground Fault Detection and Interruption The Sunny Boy is equipped with a ground fault detection device If a ground fault current greater than 1 Amp is detected the Sunny Boy will shut down and display the fault condition on the user interface display Once the ground fault is located and corrected the ground fault error will need to be manually cleared and the inverter will then resume normal operation PV Series Fusing Series fusing may be required depending on the type of PV module used in the system See NEC 690 9 Interconnection Code Compliance The Sunny Boy has been tested and listed by Underwriters Laboratories to meet the requirements of UL1741 Static Inverters and Charge Controllers for use in Photovoltaic Power Systems and UL1998 Software in Programmable Components as well as I
23. to consult with your PV module manufacturer for appropriate PV string fuse ratings The minimum size of fuses and wiring are calculated using the Short Circuit Current Rating Isc of the PV module The NEC requires that all fuses and wiring be sized for a minimum of 1 56 times the Isc of the PV module used in the system The proper size PV string fuse is determined by calculating 1 56 x Isc of the PV module and then rounding up to the next standard fuse size T Example If the Isc of the PV module equals 6 9 then the PV string fuse size is determined by 1 56 x 6 9 10 76 The next standard fuse size would be a 12A 600Vdc fuse N CAUTION The string fuse size must not be greater than the maximum fuse size rating of the PV module as provided on the PV module manvfacturers data sheet If no maximum fuse size is indicated please contact the PV module manufacturer DC Disconnect Requirements NEC 690 15 18 allows the use of fuse holders as a suitable means of disconnecting PV arrays for servicing Additional DC disconnects external to the inverter may be required by the local authority having jurisdiction N WARNING Never remove a fuse while it is under load Electrical arcing and damage to the fuse holder will occur if a fuse removed under load PV String Fuses The SMA DC Disconnect is shipped with 15 A 600 Vdc fuses in the fuse holders The maximum string fuse rating for the SMA DC Disconn
24. voltage that can cause serious injury N WARNING Always turn OFF all breakers and switches in the PV system before connecting any wires to or disconnecting any wires from the Sunny Boy For inverters provided with a fixed AC output 1 Information The AC input and AC output circuits are isolated from the enclosure and system grounding if required by section 250 of the National Electric Code ANSI NFPA 70 is the responsibility of the installer The Photovoltaic System Grounding shall be installed per the requirements of sections 690 41 through 690 47 of the National Electric Code ANSI NFPA 70 and is the responsibility of the installer Installation Guide SB50US 70US 1US090523 39 Wiring the Sunny Boy SMA Solar Technology AG AC Grounding The Sunny Boy must be connected to the AC ground from the utility via the Ground Terminal PE see Figure 3 1 Sunny Boy Internal Components on page 19 PV Grounding The PV array frame ground should be connected to the PV Grounding and DC Grounding Electrode Conductor see Figure 3 1 Sunny Boy Internal Components on page 19 The size for the conductor is usually based on the size of the largest conductor in the DC system DC Grounding Electrode Conductor A DC grounding electrode conductor may be required by the Authority Having Jurisdiction Use the PV Grounding and DC Grounding Electrode Conductor see Figure 3 1 Sunny Boy Internal Components on page
25. 19 40 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 1 Sequence of Connecting 5 1 1 Wiring without SMA DC Disconnect N WARNING Always connect the wires to the Sunny Boy in the following sequence 1 De energize all energy sources by opening all AC and DC disconnects and or breakers 2 Wiring from AC breaker to the AC disconnect switch Wiring from the AC disconnect switch to the Sunny Boy follow the procedure on page 50 et seq Wiring from the PV wires to the DC disconnect Wiring from the DC disconnect to the Sunny Boy follow the procedure on page 61 et seq Turn the DC switches and or breakers ON Turn the AC switches and or breakers ON To disconnect the Sunny Boy first turn OFF all AC disconnects and then all DC disconnects The AC system should always be disconnected before the DC system OSB After the Sunny Boy is de energized disconnect the wiring in the reverse order from above N WARNING Always wait a minimum of 5 minutes for stored potentials in the Sunny Boy to discharge completely before opening the enclosure N WARNING All electrical installations must be done in accordance with all local electrical codes and the National Electrical Code NEC ANSI NFPA 70 N WARNING Before connecting the Sunny Boy to the electrical utility grid contact the local utility company This connection must be made only by qualified personnel
26. 2 Nm Green Terminal Blocks Phoenix 6 8 AWG 40 indb 4 5 Nm AWG 22 inb 2 5 Nm Verify that all connections are correctly wired and properly torqued Make a tension test Installation Guide SB50US 70US 1US090523 65 Wiring the Sunny Boy SMA Solar Technology AG Positive Grounding ET Information 66 To verify that your inverter is grounded as intended please refer to section 5 7 DC Input Grounding page 59 Connect the negative DC wires to the terminal labeled Negative DC wires PV UNGROUNDED in the SMA DC Disconnect Connect the positive DC wires to the terminal labeled Positive DC wires PV GROUNDED in the SMA DC Disconnect Torque all wires in the terminal blocks inside the SMA DC Disconnect to 15 in lb 1 7 Nm Use a screwdriver in order to poke a hole in the groove of the grommet Remove the membrane SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 6 Pull the DC wires from the DC disconnect through the conduit into the interior of the Sunny Boy 7 Pullthe wires slightly back in orderto seal the grommet 8 Connect the white wire PV GROUNDED to the terminal labeled DC in the Sunny Boy 9 Connect the black wire PV UNGROUNDED to the DC terminal labeled DC in the Sunny Boy Torque all wires in the terminal blocks inside the Sunny Boy to Grey Terminal
27. 3 4 cross recess Pillips pan head machine screw Install the x 10 screw and washer on the bottom side of the SMA DC Disconnect to fasten the cover The teeth of the washer must face toward the cover in order to ensure proper grounding Tighten the screw to a torque of 44 in lb 5 Nm Installation Guide SB50US 70US 1US090523 75 Commissioning SMA Solar Technology AG 6 Commissioning N WARNING Follow the steps in the commissioning procedure in the order they are presented Deviating from these procedures could expose you to lethal voltages that can cause serious injury and or death N WARNING Never insert the GFDI fuse into the Sunny Boy without the fuse holder base Latent voltage may still be present and electric shock may result CAUTION Follow the steps in the commissioning procedure in the order they are presented Deviating from these procedures could cause irreversible damage to the Sunny Boy and void the warranty All Sunny Boy inverters have a sophisticated system for detecting and responding to PV array ground faults as required by NEC Section 690 5 The PV array normally operates in a grounded configuration Depending on the type of system the array s negative or positive conductor is connected to the grounding system inside the inverter as a part of the UL1741 Listed ground fault detection system The GFDI protection is active whenever there is sufficient DC voltag
28. 6 ON all AC and DC switchens and or breakers Installation Guide SB50US 70US 1US090523 103 Maintenance SMA Solar Technology AG 9 4 2 Exchanging the PV String Fuses within the SMA DC Disconnect Turn OFF all AC and DC switches and or breakers Wait for at least 5 minutes 3 Open the SMA DCDisconnect as described in section 5 4 Opening the SMA DC Disconnect if applicable page 44 4 Exchange the fuses having regard to the information on the next page EM S d i S E 25 ano 2020 J Figure 9 3 Position of Fuses within the SMA DC Disconnect 5 Close the SMA DC Disconnect 6 ON all AC and DC switches and or breakers 104 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Maintenance PV String Fuse Sizing In any electrical system fuses are used to protect wiring and equipment from excessive currents that can cause damage heating or in extreme cases even fire If the fuse rating is too small it could open during normal operation If the fuse rating is too large it cannot provide the needed protection In PV systems the minimum and maximum size of the series fuse is determined by the electrical ratings of the PV module as well as by UL and National Electrical Code NEC requirements Be sure
29. Boy inverter Section 5 Wiring the Sunny Boy This section includes guidelines for selecting the correct wire sizes cautions and warnings that you should follow to avoid injury and or equipment damage and step by step instructions for wiring the Sunny Boy to a PV array household electrical circuits and the utility grid Procedures are also included for connecting optional data communication cables Section 6 Commissioning Commissioning involves applying DC input power to the Sunny Boy observing the LED and LCD indicators on the front cover and resolving any problems that occur Section 7 Displays and Messages This section provides troubleshooting tips and procedures for resolving problems that may occur during installation and operation Section 8 Troubleshooting This section provides troubleshooting tips and procedures for resolving problems that may occur during installation and operation Section 9 Maintenance This section includes maintenance and cleaning of the Sunny Boy and cautions and warnings you should follow to avoid injury and or equipment damage Section 10 Technical Specifications This section includes technical data for the Sunny Boy connection diagrams and torque specifications for the connection of cables and the screws of the Sunny Boy Installation Guide SB50US 70US IUSO90523 15 Unpacking and Inspection SMA Solar Technology AG 2 Unpacking and Inspection All Sunny Boy inverters are thoroughly
30. Connect the green yellow cable of the Sunny Boy to the terminal labeled Installation Guide Wiring the Sunny Boy SB50US 70US 1US090523 55 Wiring the Sunny Boy SMA Solar Technology AG 16 For 208 240 V connect the white wire of the SMA DC Disconnectto the terminal labeled N and the black wire to the terminal labeled L1 of the Sunny Boy For 277 V connect the white wire of the SMA DC Disconnectto the terminal labeled N and the black wire to the terminal labeled L1 of the Sunny Boy 17 For 208 240 V connect the red wire to the terminal labeled L2 in the Sunny Boy For 277 V connect the red wire to the terminal labeled fed wire in the Sunny Boy not used 18 Connect the wires to the terminal blocks in the Sunny Boy and tighten them Torques for AC connection terminal blocks Grey Terminal Blocks Weidmiiller 6 10 AWG 18 inb 2 Nm Green Terminal Blocks Phoenix 6 8 AWG 40 indb 4 5 Nm 10 AWG 22 indb 2 5 Nm 19 Verify that all connections are correctly wired and properly torqued Pull on the cable in order to make sure that it is sufficiently fixed in the terminal 56 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 6 Wiring the DC Input This subsection provides procedures for wiring the DC input from the PV array to the Sunny Boy Figure 5 12 shows a simplified wiring diagram of a PV system
31. EEE 929 2000 Recommended Practice for Utility Interface of Photovoltaic Systems and IEEE 1547 Standard for Interconnecting Distributed Resources with Electric Power Systems The Sunny Boy is also listed under UL1741 for Canadian UL UL1741 is the standard applied by Underwriters Laboratories to the Sunny Boy UL to certify that it meets the requirements of the NEC and IEEE 929 2000 IEEE 929 C US 2000 provides recommendations regarding the proper equipment and functionality necessary to ensure compatible operation when power generation is connected to the utility grid 1 Information Contact the local utility and or the authority having jurisdiction prior to connecting the Sunny Boy to the utility grid Installation Guide SB50US 70US IUSO90523 13 Introduction SMA Solar Technology AG FCC Compliance The Sunny Boy has been tested and shown to conform with all FCC Part 15 B EMI EMC emissions regulations Feature Overview Over twenty years of inverter manufacturing experience has gone into the design of the Sunny Boy As a result the Sunny Boy represents state of the art technology high reliability and over all ease of use all the qualities you ve come to expect from the industry leader in inverter manvfacturing Some of the features included are e LCD Display e Temperature regulated fan cooling with simplified fan replacement Auto line voltage detection and configuration e Advanced communication options e Compatible with all
32. ISTRIBUTION PANEL Sunny Boy Connections for 277 V AC grids PV GROUND GROUND GEA la ON ON NEUTRAL gorg PED 444 o e Li AL 3 BREAKER or V SIZE PV N ju PE C 1 40 Amp AC DC DISCONNECT Pv DISCONNECT SWITCH SWITCH Pv ARRAY Installation Guide AC DISTRIBUTION PANEL SB50US 70US 1US090523 EARTH GROUND 107 Technical Specifications SMA Solar Technology AG 10 2 2 With SMA DC Disconnect Sunny Boy Connections for 208 and 240 V AC grids UTILITY GROUND EQUIPMENT GROUND NEUTRAL MAIN BREAKER SIZE PV Ungrounded PE 2p 50 Amp PV Grounded AC DISCONNECT SWITCH AC SMA DC Disconnect DISTRIBUTION PANEL EARTH GROUND Sunny Boy Connections for 277 V AC grids C A a E UTILITY le s um GROUND EQUIPMENT GROUND dh ON T NEUTRAL HA ls E alos 44 LoT BREAKER or SIZE 1 40 cx PVGrounded AC Pv DISCONNECT SWITCH PV ARRAY SMA DC Disconnect DISTRIBUTI N PANEL EARTH GROUND 108 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG 10 3 Specifications 10 3 1 Sunny Boy Technical Specifications Inverter Technology Sine wave current source high f
33. Min Recnet 0 50 11 7 Installer Vac Max Recnet 0 20 5 83 Installer Values are used to calculate the lower and upper limits to reconnect to the grid after a grid frailure Vpv Start 250 600 300 Installer Minimum DC voltage for the Sunny Boy to connect to the grid The following parameters appear in parameter list but cannot be modified 94 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Displays and Messages Table 7 2 Operating Parameters of the Sunny Boy Fixed Name Unit Range Default Description Plimit Ww fixed SB5000US 5050 Upper limit of AC output power SB6000US 6050 58700005 7050 SMA SN Serial Number of the Sunny Boy Software BFR Firmware version of the operation control unit BFR Software SRR Firmware version of the current control unit SRR Installation Guide SB50US 70US 1US090523 95 Troubleshooting SMA Solar Technology AG 8 Troubleshooting 8 1 General Our quality control program assures that each inverter is manufactured to exact specifications and is thoroughly tested before leaving the factory If you encounter difficulty with the operation of your inverter please follow the steps below in an effort to correct the problem e Checktheblinking code on the lid of the Sunny Boy and compare the code with the blinking codes in Section 6 Commissioning page 76
34. Solar Inverter Sunny Boy 500005 6000US 700005 Installation Guide SB50US 70US IUSO90523 TBUS SB50 60 7OUS Version 2 3 SMA Solar Technology AG Copyright 2008 SMA America Inc All rights reserved No part of this document may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photographic magnetic or otherwise without the prior written permission of SMA America Inc SMA America makes no representations express or implied with respect to this documentation or any of the equipment and or software it may describe including with no limitation any implied warranties of utility merchantability or fitness for any particular purpose All such warranties are expressly disclaimed Neither SMA America nor its distributors or dealers shall be liable for any indirect incidental or consequential damages under any circumstances The exclusion of implied warranties may not apply in all cases under some statutes and thus the above exclusion may not apply Specifications are subject to change without notice Every attempt has been made to make this document complete accurate and up to date Readers are cautioned however that SMA America reserves the right to make changes without notice and shall not be responsible for any damages including indirect incidental or consequential damages caused by reliance on the material presented including but not limited to om
35. V DC the Sunny Boy will automatically begin feeding power to the utility grid Information The Sunny Boy operates from the power produced by the PV array and is designed for minimal internal DC power consumption The maximum power that the Sunny Boy will consume in normal operation is ZW Information Anytime the AC power is disconnected from the inverter either manually or as a result of an AC disturbance the inverter will wait 5 minutes after the AC power has been restored to reconnect When servicing the inverter always disconnect the DC first then the AC Installation Guide SB50US 70US IUSO90523 77 Displays and Messages SMA Solar Technology AG 7 Displays and Messages Figure 7 1 The Sunny Boy LED Status Indicator Each Sunny Boy inverter comes equipped with three LED status indicators Shown in Figure 7 1 This allows the user to determine the operating mode of the inverter at a glance The basic definitions of the indicator lights are as follows The green LED indicates normal operation of the inverter The red LED indicates the status of the GFDI fuse located inside the Sunny Boy If this LED is lit the GFDI fuse has cleared or is not present The yellow LED indicates that there is a fault of some kind either inside the inverter or somewhere in the PV system The inverter will not operate until the fault has been corrected The different error codes and possible causes are addressed later in this section
36. a problem with the internal ROM An Error condition will prevent the inverter from restarting until the condition is cleared Installation Guide SB50US 70US IUSO90523 87 Displays and Messages SMA Solar Technology AG d Information Each fault message is displayed for 5 seconds After 5 seconds the LCD will once again scroll through its normal operating screens The fault condition will be included in the series of screens until the condition is cleared 7 3 1 LCD Display Language Selection The LCD Display has the ability to display information in one of four different languages Setting the language is performed by using a pair of slide switches located along the bottom edge of the display PC board The language choices are Spanish English French and German Use the diagram and chart below for setting the display Position of the switches for configuration of the Display language Language Switch S2 Switch S1 German B B English B UUUVUUUUUUUUUU French A B Spanish A A Switch 2 Switch S1 Figure 7 3 Language Selection Switches for the LCD Display 88 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Displays and Messages 7 4 Communication Options Sunny Boy inverters are available with different communication options de
37. ages Trip Voltages Trip Times s Voltage V Line to Neutral Line to Line V v 208 50 57 6 62 4 99 8 108 2 max 0 1602 88 103 2 108 0 178 9 187 2 max 2 002 110 129 6 134 4 224 6 233 0 max 1 001 120 141 6 146 4 245 4 253 8 max 0 1602 240 50 57 6 62 4 115 2 124 8 max 0 1602 88 103 2 108 0 206 4 216 0 max 2 002 110 129 6 134 4 259 2 268 8 max 1 001 120 141 6 146 4 283 2 292 8 max 0 1602 277 50 133 0 144 0 N A max 0 1602 88 238 2 249 3 max 2 002 110 299 2 310 2 max 1 001 120 326 9 337 9 max 0 1602 The intervals result from the measuring accuracies listed below Manufacturer s Accuracies Trip Limit Accuracy 2 of nominal grid voltage Trip Time Accuracy 0 1 of nominal trip time Trip Frequency Accuracy 0 1 of nominal frequency 112 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Technical Specifications 10 5 Torque Values and Wire Sizes Terminal in lbs Nm Wire Size Grey AC amp DC Terminal Blocks 18 2 6 10 AWG Weidmiller Inverter Green AC amp DC Terminal 40 4 5 6 8 AWG Blocks Phoenix 22 2 5 10 AWG Inverter Grey AC Configuration 11 1 2 Terminal Blocks for Unused Wires Weidm ller Green AC Configuration 15 1 7 Terminal Blocks for Unused Wires Phoenix AC amp DC Terminal Blocks SMA 15 1 7 6 10 AWG DC Disconnect Combined Terminal Block SMA Spring Spring 6 10
38. al energy when exposed to light and thus can create an electrical shock hazard Wiring of the PV arrays should only be performed by qualified personnel Installation Guide SB50US 70US IUSO90523 5 SMA Solar Technology AG SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Table of Contents Table of Contents 1 1 1 1 2 1 3 2 2 1 3 3 1 3 2 3 3 3 4 3 5 4 4 1 4 2 4 3 4 3 1 4 3 2 4 3 3 Sol 5 1 1 5 1 2 5 2 5 3 5 4 Introduction ico eso seh tenia 11 Product 12 SOLELY nsus T8 Installation 15 Unpacking and 16 Scope of Delivery o ioco iv Ee E SOR AISA 17 AC Voltage 18 Opening the Sunny 18 Locating Internal 19 Configuring the AC 20 Automatic Grid Voltage 22 Utility Configuration 24 MOUNTING 20s ere ah oe ele Ra a 26 Choosing a Mounting 27 Dimensions and Required 30 Mounting Procedure 33 Mounting the Wall Mounting
39. all mounting bracket that is suitable for use with most walls see Figure 4 5 through Figure 4 7 The horizontal part of the bracket has 12 holes the 4 outermost holes are spaced on 16 inch centers for mounting on wooden stud walls Make sure that the wall you choose to mount the Sunny Boy on is sturdy enough to support its weight 65 kg 145 lb over a long period of time and that the wall is plumb The bracket may also be mounted on stone brick or solid walls Be sure to use the appropriate type of mounting hardware for the wall material and ensure that the hardware is no smaller than 4 Figure 4 6 Mounting Bracket wood wall mounting 1 Installation Guide SB50US 70US 1US090523 33 Mounting SMA Solar Technology AG Figure 4 7 Mounting Bracket wood wall mounting 2 Use the following procedure to mount the wall mounting bracket l Locate the T shaped wall mounting bracket included in the shipping container with the Sunny Boy 2 Position the wall mounting bracket against the wall where you intend to mount the Sunny Boy Try to mount the Sunny Boy so that the display is approximately at eye level Place a level on the top edge of the bracket and adjust the position of the bracket until it is level The bottom of the bracket will be the approximate location of the bottom of the inverter 3 Using the wall mounting bracket as a template mark the wall through at least three holes in the horizontal or vertical portion of
40. an reinstall them using the above steps in reverse order 8 Do not blow air through the fans or the fan screens while the fan plate is assembled on the Sunny Boy 100 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Maintenance 9 2 Cleaning the Handle Covers There are handle covers on either side of the Sunny Boy The Sunny Boy sucks air in from underneath via the fan and blows it out again on the upper sides For optimum heat dissipation within the device you have to clean both handle covers Proceed as follows when cleaning the handle covers Thehandle covers of the Sunny Boy are on the sides of the enclosure Place your fingers in the space between the top of the housing and the handle covers and gently pull the handle covers out of their bracket e Insert the handle covers back into the Sunny Boy The handle covers can only be inserted on the right or left side of the Sunny Boy respectively links left or rechts right is printed on the inside of the handle covers to help you identify the sides E Information The handle covers must not be removed permanently because otherwise the device is not protected against the entrance of insects Should the handle covers break new handle covers can be ordered from SMA America Installation Guide SB50US 70US 1US090523 101 Maintenance SMA Solar Technology AG 9 3 Testing the Fans You can verify the operation of the fans in two ways Setthe
41. and in Section 8 Troubleshooting page 96 78 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Displays and Messages The red and yellow LEDs combined indicate that the inverter has detected a ground fault The ground fault must be located i El and cleared and the inverter reset manually The inverter will z amp not restart automatically after detecting a ground fault The lt ground fault may also clear the GFDI fuse no I i Information All GFDI fuses are disabled in turbine mode 7 1 LED Operation Indicators Standby Night All LEDs are off The inverter is in standby mode because the input voltage is too low for operation Initialization All LEDs are on The inverter is initializing The power from the array is sufficient to initialize control power but not yet powerful enough to begin normal operation Data transmission is not possible during initialization Occasionally during inclement weather or low irradiation the LEDs may all turn on at once and then go off again This indicates that the inverter is trying to initialize but the power available from the array is not sufficient for normal operation This is not a malfunction Installation Guide SB50US 70US IUSO90523 79 Displays and Messages SMA Solar Technology AG Starting ja Green LED blinks three times per second The inverter has sufficient PV powe
42. area of the SMA DC Disconnect with a small phillips screwdriver used screw UNC no 5 x 3 4 cross recess Phillips pan head machine screw Do not remove the screw Check if you can remove the knob of the SMA DC Disconnect If not unscrew the screw further until you can remove the knob The screw is attached with a rubber washer in order to make the assembly easier 3 Remove the M x 10 screw and the washer from the bottom side of the SMA DC Disconnect which fastens the cover 4 Pull off the switch handle 5 Remove the cover of the SMA DC Disconnect by pulling it down and moving it at the same time carefully forward at its lower edge 44 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 5 Wiring the AC Output This subsection provides complete step by step procedures for wiring the AC output from the Sunny Boy to the utility grid 5 5 1 AC Connection Requirements N WARNING All electrical installations must be done in accordance with all local electrical codes and with the National Electrical Code NEC ANSI NFPA 70 Use 6 AWG maximum 90 C 194 F copper wire for all AC wiring connections to the Sunny Boy Voltage drop and other considerations may dictate that larger size wires be used Use only solid or stranded wire but not fine stranded wire N WARNING The National Electrical Code NEC states that the inverter must be connected to a dedicated circuit and that no oth
43. as to be at least 3 ft 242 mm 9 53 in 613 mm 24 14 in 468 mm 18 42 in Figure 4 2 Outer Dimensions of the Sunny Boy i Information You must ensure that there is sufficient clearance for the flow of the air around the Sunny Boy In a normal operating environment with good ventilation eight inches of clearance is adequate The National Electrical Code may require significantly larger working clearances see NEC Section 110 26 30 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Mounting 450 mm 17 72 in 584 mm 22 99 in 4 80 mm 3 15 in 4 280 mm 11 02 in e74 mm 2 91in gt Figure 4 3 Dimensions of the Wall Mounting Bracket Installation Guide SB50US 70US IUSO90523 31 SMA Solar Technology AG Mounting 6 0 De H Fe L LO E 1 87 in 3 54 in 1 87 in 1 46 in Omo _ IL Figure 4 4 Dimensions for the installation of the conduits Installation Guide 32 SB50US 70US 1US090523 SMA Solar Technology AG Mounting 4 3 Mounting Procedure 4 3 1 Mounting the Wall Mounting Bracket The Sunny Boy is shipped with a T shaped w
44. ckout 5 Refer to Figure 5 15 for steps 6 through 8 Positive DC wire Negative DC wire DC Knockout connected to DC connected to DC Figure 5 15 DC Connection Terminals 6 Pullthe DC wires from the DC disconnect through the conduit into the interior of the Sunny Boy 7 Connect the positive DC wire to the terminal labeled DC in the Sunny Boy 8 Connect the negative DC wire to the terminal labeled DC in the Sunny Boy i Information The Sunny Boy has provisions for up to three PV strings The positive and negative terminal blocks each have three positions so three pairs of DC input wires can be connected in parallel Installation Guide SB50US 70US IUSO90523 61 Wiring the Sunny Boy SMA Solar Technology AG N CAUTION Avoid using wire nuts to join any wires together or to make any connections anywhere in the PV system Wire nuts are a frequent cause of unreliable resistive connections and ground faults d Information The terminal must be opened completely before you insert the cable 9 Connect the positive and negative DC wires to the appropriate terminals in the DC disconnect enclosure 10 Connect the DC equipment ground wire to the PE terminal labeled in the Sunny Boy 11 Torque all wires in the AC and DC terminal blocks inside the Sunny Boy to Grey Terminal Blocks Weidm ller 6 10 AWG 18 in lb 2 Nm Green Terminal Bloc
45. d 240 V AC service 1 5 SMA recommended max voltage drop Figure 5 4 SB 6000US Energy Losses in Various Wire Sizes and Wire Lengths Percent voltage drop for 277 V AC service 1 5 SMA recommended max voltage drop Figure 5 5 SB 6000US Energy Losses in Various Wire Sizes and Wire Lengths Installation Guide SB50US 70US 1US090523 47 Wiring the Sunny Boy SMA Solar Technology AG Sunny Boy SB 7000US Percent voltage drop for 208 V AC and 240 V AC service 1 5 SMA recommended max voltage drop Figure 5 6 SB 700005 Energy Losses in Various Wire Sizes and Wire Lengths Percent voltage drop for 277 V AC service 1 5 SMA recommended max voltage drop Figure 5 7 SB 700005 Energy Losses in Various Wire Sizes and Wire Lengths 48 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy The Sunny Boy is designed to automatically detect which grid voltage it is feeding Depending upon the voltage and phase angle between L1 N and L2 N the inverter will determine if it is connected to a 208 V 240 V or 277 V grid Table 5 1 lists the voltage and frequency limits for the AC connection Table 5 1 Voltage and Frequency Limits for the AC Connection Voltage Range for 208 V nominal line to line 183 V 229 V Voltage Range for 240 V n
46. e The cable should be no longer than 1200 meters 4000 feet with a common shield and a wire size no smaller than 24 AWG Use the cable type specified in the RS232 Tech Note on www sma america com RS485 cables are available from SMA America e Conduit may be required for communication wiring per local electrical code requirements 70 SB50US 70USUS090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy Connecting an RS485 Cable Use the following procedure to install an RS485 data communication network i Information The following steps describe how to connect one or more Sunny Boy inverters to an RS485 bus For more information on connecting more than one inverter to an RS485 bus please see Technical Note RS485 Communication in the Tech Updates section of our web site at www sma america com 1 Connect the three wires of the RS485 cable to terminals 2 5 and 7 of the communication terminal block as shown in Figure 5 18 Record the wire color used for each of the terminals Torque the wires to 18 in lb 2 Nm 2 Connect the shield of the cable to the flat connection for grounding in the Sunny Boy for position see Figure 3 1 Do NOT connect the cable shield to the PC s DB 9 connector The shield must remain floating at the PC 3 Install a jumper in position A the bottom set of pins on the communication jumper block to set it for termination 1 Information The termination of the
47. e Sunny Boy Also inspect the AC disconnect between the Sunny Boy and the grid N CAUTION Have the grid connection to the Sunny Boy checked only by qualified personnel Installation Guide SB50US 70US 1US090523 83 Displays and Messages SMA Solar Technology AG N WARNING If opening the Sunny Boy is required do so only after disconnecting all sources of power and waiting at least 5 minutes High DC Input Voltage Yellow LED is blinking 4 times in short intervals 1 Loo EEE om mt 5s 3s 15 15 15 5 The message is repeated 3 times and then starts from the beginning The yellow LED is on for 5 seconds remains off for 3 seconds and then blinks 4 times The code is repeated 3 times If the condition remains the code will continue to be sent The inverter has detected a DC input voltage that is too high for safe operation N WARNING Disconnect the PV array from the Sunny Boy immediately High DC input voltage can permanently damage the inverter Have the input source checked by a qualified technician N WARNING Always test the DC voltage at the DC disconnect switch before energizing the Sunny Boy 84 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Displays and Messages Inverter Fault Yellow LED is blinking 5 times in short intervals I I N 5s 3s 15 1s 1s 15 15 The message is repeated 3 t
48. e to turn on the LCD in the Sunny Boy To commission the Sunny Boy follow these simple instructions 1 Make sure any covering placed over the PV array is removed 2 Connect the grid voltage to the Sunny Boy by switching on the main AC circuit breaker in the main utility panel 3 Switch the external DC disconnect to the position or switch the SMA DC Disconnect to the 1 position If there is sufficient sunlight available the Sunny Boy will enter the Wait mode at this time and the green LED will begin to blink 4 If no AC faults are detected the Wait mode will end after 10 seconds and the green LED will stop blinking remain on and the Sunny Boy will begin to operate normally If an AC fault was registered the Sunny Boy will wait 5 minutes prior to starting 76 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Commissioning d Information If there is a ground fault in the array the EarthCurrentMax error message will be displayed and the GFDI fuse may clear If this error message is encountered switch off the DC and AC disconnects to the Sunny Boy and troubleshoot the array Information If the Sunny Boy is not operating as expected after the commissioning procedure has been completed refer to Section 7 Displays and Messages page 78 and to Section 8 Troubleshooting page 96 Information IF there is adequate solar irradiation and the resulting PV input voltage is greater than 300
49. eas CAUTION The Sunny Boy weighs 145 Ib 65 kg Ensure that the mounting surface is strong enough to hold the weight of the Sunny Boy Do not mount the Sunny Boy on plasterboard sheetrock or thin wood panelling CAUTION Rain tight or wet location hubs that comply with the requirements in the Standard for Fittings for Cable and Conduit UL 51 4B are to be used A A A Do not install the Sunny Boy during periods of precipitation or high humidity gt 95 Moisture trapped within the enclosure may cause corrosion and damage to the electronic components CAUTION If you are installing the Sunny Boy in a cabinet closet or other relatively small enclosed area you must provide sufficient air circulation to dissipate the heat generated by the inverter 28 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Mounting WARNING To prevent electrical shock or other injury check for existing electrical or plumbing installations in the walls before drilling mounting holes for the Sunny Boy Installation Guide SB50US 70US 1US090523 29 Mounting SMA Solar Technology AG 4 2 Dimensions and Required Clearances The outer dimensions of the Sunny Boy are shown in Figure 4 2 The Sunny Boy must be mounted so that there is at least eight inches of clearance around the Sunny Boy The clearance between the inverter or the SMA DC Disconnect if applicable and the ground h
50. ect is 15 A Figure 9 3 shows the string fuse holders and their corresponding terminals Installation Guide SB50US 70US 1US090523 105 Technical Specifications SMA Solar Technology AG 10 Technical Specifications 10 1 FCC Compliance Information SMA Utility Interactive Inverter Model Sunny Boy This device complies with Part 15 of the FCC Rules Operation is subject to the following conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation NOTE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna e Increase the separation between the equipment and the rec
51. ection functions 7 5 1 Measuring Channels Vpv Vpv Setpoint lac Vac Vac L1 Vac L2 Fac Pac Vpv PE Temperature Max Temperature Max Vpv dif Vfan E Total h Total h on Power On Event Cnt 90 SB50US 70US IUSO90523 PV input voltage MPPT DC voltage target Grid current Grid voltage L1 L2 Grid voltage L1 N Grid voltage L2 N Grid frequency Power fed to grid PV voltage to earth For troubleshooting PV ground faults Temperature measured at IGBT module PV current Max temperature measured at IGBT Max PV input voltage Error current Fan voltage Total energy yield Total operation hours h on indicates how long sufficient DC voltage has been applied to the Sunny Boy and the Sunny Boy has been active including the time it was not able to feed to the utility with respect to low DC voltage or operation in stop mode Total system startup counter Event counter Installation Guide SMA Solar Technology AG Serial Number CO2 saved Mode Grid Type Error Displays and Messages Serial number of the Sunny Boy Amount CO2 saved in operation time Current operating mode Type of grid the Sunny Boy is connected to Description of fault 7 5 2 Operating Mode Stop Offset Waiting Grid monitoring MPP Search MPP V Const Derating Disturbance Error Warning Installation Guide Manual system stop Offset calibration of the elect
52. ed wires Grey Terminal Blocks Weidm ller 11 indb 1 2 Nm Green Terminal Blocks Phoenix 15 inb 1 7 Nm Figure 3 2 Input Voltage Wiring Terminals If the Sunny Boy is configured for the incorrect transformer voltage e g the inverter is configured for 240V and then connected to a 208V grid the Sunny Boy will display the following error message IFthis error message is encountered recheck the input voltage configuration and confirm that it is set properly Installation Guide SB50US 70US IUSO90523 21 AC Voltage Configuration SMA Solar Technology AG 3 4 Automatic Grid Voltage Detection The Sunny Boy is designed to automatically detect which grid voltage it is feeding Depending upon the voltage and phase angle between L1 N and L2 N the inverter will determine if it is connected to a 208 V 240 V or 277 V grid Table 3 1 lists the voltage and frequency limits for the AC connection Table 3 1 Voltage and Frequency Limits for the AC Connection Voltage Range for 208 V nominal line to line 183 V 229 V Voltage Range for 240 V nominal line to line 211V 264V Voltage Range for 277 V nominal line to neutral 244 V 305 V Frequency Range 59 3 Hz 60 5 Hz If the utility system has a neutral the local Authority Having Jurisdiction AHJ may require that the n
53. eiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help user is cautioned that changes or modifications not expressly approved by SMA America Inc could void the user s authority to operate this equipment Contact SMA America for more information SMA America Incorporated 4031 Alvis Court Rocklin California 95677 4011 Tel 916 625 0870 Fax 916 625 0871 www sma america com 106 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG 10 2 Sunny Boy Wiring Diagrams 10 2 1 Without SMA DC Disconnect Sunny Boy Connections for 208 and 240 V AC grids TT N o e Technical Specifications UTILITY EARTH GRDUND UTILITY Pv e GROUND GEA N QN ON 7 NEUTRAL ay Is Jos 44 Hi BREAKER o SIZE umm Pv INILIL2 Ek T 2p 50 Amp PV DISCONNECT DISCONNECT SWITCH SWITCH PV ARRAY D
54. er outlets or devices can be connected to the same circuit See NEC Section 690 64 b 1 The NEC also imposes limitations on the size of the inverter and the manner in which it is connected to the utility grid See NEC Section 690 64 b 2 N WARNING To reduce the risk of fire connect only to a circuit provided with the required branch circuit overcurrent device sized in accordance with the National Electric Code ANSI NFPA 70 The maximum size overcurrent device shall not be more than 50 amperes The following diagrams show the potential losses in AC wires with respect to the cross sectional area of the cable and the length of the cable Use the following diagrams to determine the best wire size to use for your particular installation Installation Guide SB50US 70US IUSO90523 45 Wiring the Sunny Boy SMA Solar Technology AG Sunny Boy SB 5000US Percent voltage drop for 208 V AC and 240 V AC service 1 5 SMA recommended max voltage drop Figure 5 2 SB 5000US Energy Losses in Various Wire Sizes and Wire Lengths Percent voltage drop for 277 V AC service 1 5 SMA recommended max voltage drop 10 AWG 8 AWG Figure 5 3 SB 5000US Energy Losses in Various Wire Sizes and Wire Lengths 46 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy Sunny Boy SB 6000US Percent voltage drop for 208 V AC an
55. erminal n Q Equipment ground wire connected to PE terminal L2 wire connected to L2 terminal Figure 5 8 AC Connection Terminals for 208 V and 240 V Installation Guide SB50US 70US 1US090523 51 Wiring the Sunny Boy SMA Solar Technology AG L1 wire connected to L1 terminal N wire connected to N terminal Equipment ground wire Q connected to PE terminal Figure 5 9 AC Connection Terminals for 277 V 52 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 5 3 AC Wiring With SMA DC Disconnect Use the following procedure to connect the AC wires to the Sunny Boy with the SMA DC Disconnect N WARNING You must connect the wires that carry the AC voltage from the Sunny Boy to the utility grid in the order described in this procedure Deviating from this procedure could expose you to lethal voltages that can cause serious injury and or death 1 Turn OFF the main breaker in the main utility breaker box 2 Remove interior breaker panel cover If you are replacing an existing inverter disconnect the wires for the AC line you are working with in the breaker box 4 Install a 3 4 inch conduit fitting in the SMA DC Disconnect AC wiring knockout the knockout on the right side of the SMA DC Disconnect Fasten the conduit fitting on the inside of the SMA DC Disconnect with the appropriate locknut 5 Install 3 4 inch conduit between the main breaker box and the SMA DC Di
56. es re check all your connections to ensure that everything is in the right place and that all connections and knockout fittings are secure and properly torqued Check all of the knockout fittings on the bottom of the Sunny Boy to ensure that they provide a weather tight seal N WARNING Never install the Sunny Boy during rain or very damp conditions Because the Sunny Boy is completely sealed you must be sure no moisture is trapped inside the enclosure when securing the lid N CAUTION Be careful notto misplace the screws or the lock washers that attach the cover to the case as all six screws and lock washers are required to ensure that the cover is grounded properly and is fully sealed to the case Handle the cover carefully as even minor damage to the cover could result in an inadequate seal between the cover and the case thus allowing moisture to enter the case and damage the sensitive electronic components Use the following procedure to replace the cover on the Sunny Boy l Check wire routing to ensure that no wires can interfere with proper sealing of the cover and that no pressure will be exerted on the connections when the cover is replaced 2 Locate the six screws and lock washers you removed to take the cover off the Sunny Boy Make sure you have all six screws and lock washers as all of this hardware is necessary to ensure proper grounding and a weather tight seal 3 Check the seal on the inside of the
57. eutral be connected to the inverter Follow the procedure in Figure 3 5 Configuration Jumper Examples for 240 V Delta 120 V Stinger on page 25 and Figure 5 8 AC Connection Terminals for 208 V and 240 V on page 51 to set the configuration jumpers and connect a neutral conductor to the Sunny Boy 22 SB50US 70US IUS090523 Installation Guide SMA Solar Technology AG AC Voltage Configuration Figure 3 3 below illustrates commonly used transformer types Remember when connecting the Sunny Boy to the utility the phase relationship is not important but the voltage must be compatible 480 Delta 277 WYE 208 Delta 120 WYE 240 120 Split Phase 480 480 208 208 480 208 240 Delta 120 Stinger 240 Delta 208 Delta 240 240 208 480 Delta 240 Delta 208 Delta DO NOT USE Corner grounded Corner grounded m sii L ui 2 LI 480 Figure 3 3 Common Utility Voltage Configurations i Information When using 240 V Delta corner grounded or 208 V Delta corner grounded grids connect the L2 terminal to the grounded corner Installation Guide SB50US 70US 1US090523 23 AC Voltage Configuration SMA Solar Technology AG 3 5 Utility Configuration Jumpers The utility configuration jumpers allow the Sunny Boy to be connected to transformers where the neutral is not present such as the 208 V and 240 V Delta shown in Figure 3 3 above Figure 3 4 below shows an over
58. for fastening the Sunny Boy to the wall mounting bracket D two jumpers in spare for the fan test and for the grid configuration E two handle covers left and right SMA DC Disconnect if applicable F one SMA DC Disconnect G one M x 10 screw and one M washer for closing the SMA DC Disconnect cover two M6x10 screws and two washers for fastening the SMA DC Disconnect to the wall mounting bracket Installation Guide SB50US 70US IUSO90523 17 AC Voltage Configuration SMA Solar Technology AG 3 AC Voltage Configuration 3 1 Opening the Sunny Boy 1 Remove the six screws and lock washers from the lt p y y housing cover and pull the cover forward smoothly 2 Placethe cover screws and lock washers aside where x they will be out of your way while you are connecting wires and cables to the Sunny Boy N CAUTION Be careful not to misplace the screws or the lock washers as all six screws and lock washers are required to ensure that the cover is grounded properly and is fully sealed to the case Handle the cover carefully as even minor damage to the cover could result in an inadequate seal between the cover and the case thus allowing moisture to enter the case and damage the sensitive electronic components amp md SO NOTICE Do not install the Sunny Boy during periods of precipitation or high humidity gt 95 Moisture trapped within the enclosure may cause corrosion and damage to
59. he factor defined in the parameter CO2 Default USA UL1741 USA Installer Used for adjusting the parameters 2005 OFF Grid UL1741 country specific settings NON IEEE1547 2005 Note After changing one of the parameteres marked with the parameter default changes to adjusted automatically dFac MAX Hz s 0 005 4 0 5 for Installer Maximum rate of frequency country change before anti islanding setting USA protection engages UL1741 2005 E Total kWh 200000 0 Installer Total energy yield of the inverter Changing the value can be necessary when a Sunny Boy is exchanged and you wish to match the previously acquired data 92 SB50US 70USUS090523 Installation Guide SMA Solar Technology AG Displays and Messages Name Fac delta Unit Hz Range 0 2 3 Default 0 69 for country setting USA UL1741 2005 Password Level Installer Fac delta Hz 0 49 for country setting USA UL1741 2005 Installer Description Maximum allowable operating frequency above and below 60 Hz Default value is optimal for installations lt 30 kW Fac MinTripTime 0 16 300 0 16 Installer Utility interconnection frequency trip time Default value is optimal for installations 30 kW Fan Test 1 0 Installer By setting this parameter to 1 you can check the function of the fans This test turns the fans at maximum speed h Total
60. he fan outputs with the handle covers see 3 in Figure 4 9 provided in the accessories kit They are required to adequately prevent insects entering the unit d Information Should the handle covers break new handle covers can be ordered from SMA America 5 Carefully verify that the Sunny Boy is firmly mounted in place Installation Guide SB50US 70US 1US090523 37 Mounting SMA Solar Technology AG 6 When the Sunny Boy has been mounted correctly it should look like one of the examples in J e e Figure 4 10 Mounted Sunny Boy with and without SMA DC Disconnect 38 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 Wiring the Sunny Boy This section provides step by step procedures and other information required for wiring the Sunny Boy to the PV array and the utility grid To complete the installation in a safe and efficient manner complete the steps in the order that they appear N WARNING Before connecting or operating the Sunny Boy read all of the instructions cautions and warnings on the Sunny Boy the PV array and in this Installation Guide N WARNING You must connect the wires that carry the AC voltage from the Sunny Boy to the utility grid and the wires that carry the DC voltage from the PV array to the Sunny Boy in the order described in the procedures in this section Deviating from these procedures could expose you to lethal
61. id voltage configuration and actual line to neutral voltage measurements 86 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Displays and Messages MSG 3 Actual AC power output and DC input voltage MSG 4 Accumulated energy yield of the device since installation and the total operating hours 1 Information The screens may also be scrolled through manually by repeatedly knocking on the lid of the inverter Each knock advances the screen to the next message Fault Messages In case of a fault condition the LCD switches to Fault mode and the backlight is activated The upper display line indicates one of the three following failure types e Disturbance For example this Disturbance message would be displayed if the Sunny Boy detected a problem with the frequency of the utility grid The message would clear automatically once the condition was corrected Disturbances are typically caused by a measured value exceeding a predetermined limit The display will show the value of the error at as well as the present value for the particular parameter present e Warning For example this Warning message would be displayed if the GFDI fuse was open or cleared Typically Warning messages indicate a system condition that should be investigated Warning conditions will not preclude inverter operation Error For example this Error message would be displayed if the inverter detected
62. iginal box to avoid damage during shipping 8 2 Error Messages If a fault occurs the Sunny Boy generates an error code according to the operating mode and the detected fault Error Type Error Code Description Disturbance Bfr Srr Communication between micro controllers is failing Warning Derating The inverter reduces the output power due to high internal temperature Error EarthCurMax B BFR earth current between PV and GND is out of tolerable range Error EarthCurMax S SRR earth current between PV and GND is out of tolerable range Disturbance EEPROM Transition failure during reading or writing of data EEPROM the data is not essential for safe operation this failure does not effect performance Error EEPROM p Data EEPROM defective device is set to permanent disable due to the fact that the data loss affects important functions of the inverter Contact SMA Disturbance EeRestore Internal failure Disturbance Fac Bfr Fac Srr The AC grid frequency is exceeding the allowable range Bfr Srr is an internal message and is not important to the user The Sunny Boy assumes that the public grid is down and disconnects from the grid in order to avoid islanding If the grid frequency is within the tolerable range and you still observe the failure message Fac Bfr or Fac Srr contact SMA Warning GFDI Fuse Open The GFDI Fuse is open or cleared Check PV array for ground faults
63. imes and then starts from the beginning The yellow LED is on for 5 seconds remains off for 3 seconds and then blinks 5 times The code is repeated 3 times If the condition remains the code will continue to be sent The inverter has encountered an internal fault that prohibits normal operation and will most likely require servicing Contact SMA America for assistance Installation Guide SB50US 70US IUSO90523 85 Displays and Messages SMA Solar Technology AG 7 3 Status Messages on the LCD Display The Sunny Boy comes standard with the Sunny Display LCD in the lid SMA SOLAR TECHNOLOGY SUNNY BOY AL U Figure 7 2 Sunny Boy LCD Display Activation of the Backlight The backlight is activated by knocking twice on the lid Additional knocks will scroll through the display messages The backlight shuts off automatically after 2 minutes INIT Messages The following messages are displayed during initialization of the inverter The installed firmware versions of the control system processor BFR and the current regulator processor SRR are displayed after 6 seconds Operation Messages The LCD continuously scrolls through all relevant operating data Each message MSG is displayed for 5 seconds after all messages have been displayed the LCD repeats from the beginning MSG 1 EToday total energy produced on this day is displayed together with the current operating mode MSG 2 Nominal gr
64. ing electrode to the grounding electrode conductor terminal B 6 Connect the PV generator grounding to the grounding electrode conductor terminal A Installation Guide SB50US 70US 1US090523 63 Wiring the Sunny Boy SMA Solar Technology AG Negative Grounding ET Information 64 To verify that your inverter is grounded as intended please refer to section 5 7 DC Input Grounding page 59 Connect the positive DC wires to the terminal labeled PV UNGROUNDED in the SMA DC Disconnect Positive DC wires Connect the negative DC wires to the terminal labeled Negative DC wires PV GROUNDED in the SMA DC Disconnect Torque all wires in the terminal blocks inside the SMA DC Disconnect to 15 in lb 1 7 Nm Use a screwdriver in order to poke a hole in the groove of the grommet Remove the membrane SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 12 Pull the DC wires from the DC disconnect through the conduit into the interior of the Sunny Boy 13 Pull the wires slightly back in order to seal the grommet 14 Connectthe black wire PV UNGROUNDED to the terminal labeled DC in the Sunny Boy 15 Connectthe white wire PV GROUNDED to the DC terminal labeled DC in the Sunny Boy 16 Torque all wires in the terminal blocks inside the Sunny Boy to Grey Terminal Blocks Weidm ller 6 10 AWG 18 inb
65. issions typographical errors arithmetical errors or listing errors in the content material SMA America Incorporated 4031 Alvis Court Rocklin California 95677 4011 Tel 916 625 0870 Fax 916 625 0871 www sma america com Installation Guide SB50US 70US 1US090523 3 SMA Solar Technology AG IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions for Models SB 5000US SB 6000US SB 7000US SOLAR INVERTERS that shall be followed during installation and maintenance of the inverter The Sunny Boy is designed and tested according to international safety requirements but as with all electrical and electronic equipment certain precautions must be observed when installing and or operating the Sunny Boy To reduce the risk of personal injury and to ensure the safe installation and operation of the Sunny Boy you must carefully read and follow all instructions cautions and warnings in this Installation Guide Warnings A Warning describes a hazard to equipment or personnel It calls attention to a procedure or practice which if not correctly performed or adhered to could result in damage to or destruction of part or all of the SMA equipment and or other equipment connected to the SMA equipment or personal injury A DANGER DANGER indicates a hazardous situation which if not avoided will result in death or serious injury WARNING WARNING indicates a hazardous situation which if
66. ks Phoenix 6 8 AWG 40 in lb 4 5 Nm 10 AWG 22 in lb 2 5 Nm 12 Verify that all connections are correctly wired and properly torqued Make a tension test 62 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 8 2 DC Wiring With SMA DC Disconnect N CAUTION Avoid using wire nuts to join any wires together or to make any connections anywhere in the PV system Wire nuts are a frequent cause of unreliable resistive connections and ground faults EU Information The terminal has to be fully opened before you insert the cabel into it Use the following procedure to connect the DC wires to the Sunny Boy with SMA DC Disconnect l Verify that the AC breaker is OFF 2 Install a 3 4 inch conduit fitting in the SMA DC Disconnect s DC wiring knockout the knockout on the left side of the SMA DC Disconnect Fasten the conduit fitting on the inside of the SMA DC Disconnect with the appropriate locknut 3 Install 3 4 inch conduit between the SMA DC Disconnect and the PV array 4 Pull the DC wires the ground wires from the PV array and the grounding electrode wire through the conduit into the interior of the SMA DC Disconnect E Information The SMA DC Disconnect has provisions for up to four PV strings The PVUNGROUNDED and PV GROUNDED terminal block each has four positions so four pairs of DC input wires can be connected in parallel 5 Connect the ground
67. lity grid contact the local utility company This connection must be made only by qualified personnel 42 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 2 Bottom View and Dimensions The DC input from the PV array via the DC disconnect enclosure and the output to the AC utility grid connect to the inverter inside the Sunny Boy s case The internal AC and DC wiring terminals accept a maximum wire size of 6 AWG Knockouts are provided on the bottom of the Sunny Boy near each of the terminals for the wires to enter the case see Figure 5 1 1 2 Communication 3 4 DC 3 4 AC Cable Glands Knockout Knockout Figure 5 1 Bottom View of the Sunny Boy Showing Wiring Knockout Locations ET Information The AC and DC knockouts are sized for 3 4 inch rigid conduit EMT DO NOT enlarge any of these holes as this is a violation of UL requirements and will void the SMA warranty 5 3 Opening the Sunny Boy 1 Remove the six screws from the housing cover and pull E the cover forward smoothly 3 2 cover the screws and the washers to one side x so that they do not get lost E i Pd Installation Guide SB50US 70US 1US090523 43 Wiring the Sunny Boy SMA Solar Technology AG 5 4 Opening the SMA DC Disconnect if applicable 1l Turn the SMA DC Disconnect off by turning the switch to e O Qr d rg 2 Loosen screw in the right
68. nny Boy may be reconfigured for other voltages by following the steps below and referring to Figure 3 2 There are four wires coming into the main cabinet through a grommet Each wire is labeled with its corresponding voltage and is connected to one of the two large terminal blocks located just below the grommet Refer to Figure 3 2 and follow the instructions below 1 The input voltage setting is determined by the jumper that is connected to the left terminal block See Figure 3 2 A The Sunny Boy comes from the factory configured for connection to a 240 V system If the system is 240 V no adjustment is necessary 20 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG AC Voltage Configuration 2 If adjustment is necessary choose the wire with the correct voltage for your application from the right terminal block C and connect it to the left side of the left terminal block Tighten all wires on the left terminal block Torques for left AC configuration terminal block Grey Terminal Blocks Weidm ller 6 10 AWG 18 inb 2 Nm Green Terminal Blocks Phoenix 6 8 AWG 40 indb 4 5 Nm 10 AWG 22 inb 2 5 Nm 3 Do not remove the wire in the left terminal block labeled V It remains connected to the right side of the left terminal block in all configurations 4 All unused wires connect to the right terminal block C and tighten them Torques for right AC configuration terminal block unus
69. nt Protection SOA Synchronization In Rush Current 9 23 A Trip Limit Accuracy 2 Trip Time Accuracy 0 1 DC Voltage Ripple Less than 10 Power Consumption 0 1 W nighttime lt 7 W in operation Ambient Temperature Rating 13 F 113 F 25 45 C Enclosure NEMA 3R IP54 aluminum Dimensions 18 42 W x 24 14 H x 9 53 D inches 468 W x 613 H x 242 D Weight 145 Ibs 65 kg Compliance UL1741 UL 1998 IEEE 1547 IEEE 929 IEEE C37 90 1 IEEE C62 41 2 test conditions 2 kV 1 FCC Pat 15A amp B Specifications subject to change without notice 110 SB50US 70USUS090523 Installation Guide SMA Solar Technology AG Technical Specifications 10 3 2 SMA DC Disconnect Maximum DC Input Current 36 ADC Maximum System Voltage 600 V DC Maximum String Fuse Rating 15 ADC Maximum AC Operating Current 40 AAC Enclosure 3R rated Specifications subject to change without notice Installation Guide SB50US 70US 1US090523 111 Technical Specifications 10 4 Trip Limits Trip Times SMA Solar Technology AG Nominal Trip Limit Hz Trip Frequencies Hz Trip Times s Freq Hz 60 gt 60 5 60 45 60 55 max 0 1602 lt 57 0 59 8 56 95 59 85 adjustable 0 16 300 default 59 3 default 59 25 59 35 default max 0 1602 lt 57 0 56 95 57 05 max 0 1602 Nominal Trip Limit Trip Volt
70. o hydro applications Turbine Mode This mode is used for DC rectified motor sources with a dynamic power curve typically wind turbines The user can set the magnitude and slope of the curve to match a particular alternator Derating Ja e Green LED is shortly off once per second The Sunny Boy is designed to operate at full rated power up to 45 C ambient The inverter will continue to operate beyond 45 C and will derate as required to maintain a safe internal component temperature Unnecessary derating can be caused by blocked fan intakes For this reason the fan intakes should be inspected often and cleaned when needed Installation Guide SB50US 70US IUSO90523 81 Displays and Messages SMA Solar Technology AG 7 2 LED Fault Indicators Ground Fault Red LED is on Yellow LED is on The inverter has detected a ground fault in the PV system and has disconnected from the grid The ground fault must be located and fixed before the inverter will resume normal operation Refer to Section 8 Troubleshooting page 96 for information on solving PV array ground faults The inverter will not restart automatically All GFDI fuses are disabled in turbine mode Cleared GFDI Fuse Red LED is on The GFDI fuse located in the fuse holder on the circuit board of the inverter has been cleared or is not present This fuse is used to protect the PV system in the event of an array ground fault
71. oated aluminum enclosure designed for outdoor installations However care should always be taken to minimize exposure to the elements It is best to minimize exposure to rain snow and ice etc Do not install the Sunny Boy in a location exposed to sources of direct water spray such as sprinklers or downspouts The inverter should be installed in a location that is inaccessible to children The Sunny Boy emits a slight vibrating noise when operating This vibration is normal and has no effect on performance but it can be objectionable if the inverter is mounted on a wall in a living area on the outside of a wall that is near a living area or on certain types of materials such as thin wood panelling or sheet metal e Ifthe inverter is installed outside it should be mounted vertically see Figure 4 1 Figure 4 1 Sunny Boy Mounting Positions ET Information These inverter types are intended for operation in an environment having a maximum ambient temperature of 113 F 45 C Installation Guide SB50US 70US IUSO90523 27 Mounting SMA Solar Technology AG DANGER Danger to life due to fire or explosion There is always a certain risk with electric devices that a fire can occur even though greatest attention was paid to avoiding this during the development Do not install the inverter on flammable construction materials inareas where highly flammable materials are stored in potentially explosive ar
72. oltage from the PV strings before you connect the DC wires to the Sunny Boy Applying an open circuit DC input voltage that exceeds the maximum DC input voltage range will cause irreversible damage to the Sunny Boy and void the warranty Always configure the DC input voltage range correctly before connecting the DC input wires from the PV array to the Sunny Boy Use the online SMA string size calculator at www sma america com to determine the correct string configuration N WARNING Verify that the DC current of your installation does not exceed the maximum values specified in the type rating label Check both the polarity and the open circuit voltage from the PV strings 60 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 8 1 DC Wiring Without SMA DC Disconnect Use the following procedure to connect the DC wires to the Sunny Boy without S MA DC Disconnect l Verify that the AC breaker is OFF 2 Verify that the DC disconnect is open in the external DC disconnect enclosure 3 Install a 3 4 inch conduit fitting in the Sunny Boy s DC wiring knockout The DC knockout is the left one of the two large openings in the center on the bottom of the Sunny Boy as shown in Figure 5 1 and Figure 5 15 Fasten the conduit fitting on the inside of the Sunny Boy with the appropriate locknut 4 Install 3 4 inch conduit between the DC disconnect enclosure and the Sunny Boy s DC wiring kno
73. ominal line to line 211V 264V Voltage Range for 277 V nominal line to neutral 244 V 305 V Frequency Range 59 3 Hz 60 5 Hz See Section 3 for information on configuring the inverter jumpers for the utility type of the installation Installation Guide SB50US 70US 1US090523 49 Wiring the Sunny Boy SMA Solar Technology AG 5 5 2 AC Wiring Without SMA DC Disconnect Use the following procedure to connect the AC wires to the Sunny Boy without the SMA DC Disconnect N WARNING You must connect the wires that carry the AC voltage from the Sunny Boy to the utility grid in the order described in this procedure Deviating from this pro cedure could expose you to lethal voltages that can cause serious injury and or death 1 Turn OFF the main breaker in the main utility breaker box Remove interior breaker panel cover If you are replacing an existing inverter disconnect the wires for the AC line you are working with in the breaker box 4 Install a 3 4 inch conduit fitting in the Sunny Boy s AC wiring knockout the knockout on the right side of the Sunny Boy as shown in Figure 5 1 Fasten the conduit fitting on the inside of the Sunny Boy with the appropriate locknut 5 Install a 3 4 inch conduit between the main breaker box and the Sunny Boy s AC wiring knockout 6 Pull the AC wires through the conduit from the interior of the breaker box to the interior of the Sunny Boy 7 Referto Figure
74. on suggestions to insure optimum performance cautions and warnings that you should follow to avoid injury and or equipment damage and step by step instructions for mounting a Sunny Boy inverter N WARNING The Sunny Boy weighs 145 Ib 65 kg To avoid injury be sure to use proper lifting techniques and secure the help of someone to assist in the unpacking and installation of the inverter Information d Occasionally the rating label on the Sunny Boy will need to be referred to For this reason it is required that the inverter be mounted so that the rating label on the side of the inverter is visible 26 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Mounting 4 1 Choosing a Mounting Location Consider the following guidelines cautions and warnings when choosing a mounting location for the Sunny Boy e Donotinstall the Sunny Boy in direct sunlight External heating from exposure to the sun may cause excessive internal heating This can result in reduced output power to protect the internal components from damage Install the Sunny Boy in a location that maintains an ambient air temperature that is less than 45 C To maintain a safe internal component temperature the Sunny Boy may power reduce if the ambient air temperature exceeds 45 C The cooler the air temperature the longer the life expectancy of any power electronics device e The Sunny Boy is constructed in a rugged Powder c
75. other end of the RS485 cable will depend on what type of device yov re connecting to For detailed information please see the Tech Updates section of our web site at www sma america com There you will find technical information on all of the Sunny Boy communication options Installation Guide SB50US 70US IUSO90523 71 Wiring the Sunny Boy SMA Solar Technology AG Jumper Configuration for RS485 Communication RS485 Piggy Back Signal Symmetry and Communication Module Termination Jumpers Terminal Block for RS485 Connection Figure 5 18 Detail of RS485 Termination and Jumper Settings Jumpers B amp C Installed Installing these jumpers puts 680 Ohm symmetry resistors between pin 2 Data and 5V and between pin 7 Data and Ground Jumper A installed Installing this jumper puts a 120 Ohm termination resistor across pin 2 Data and pin 7 Data E Information Install jumpers B amp C after the inverter is on the RS485 bus and only if symmetry of the signal is required Symmetry is already provided by the Sunny Boy Control and Sunny WebBox products Install jumper A only if the inverter is on one of the ends of the RS485 bus RS485 Pinouts 2 Data 7 B 5 SR Signal Ref 72 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Wiring the Sunny Boy 5 10 Closing the Sunny Boy When you have finished connecting the AC output wires the DC input wires and the communication cabl
76. pending upon your needs The Sunny Boy series allows for both internal and external metering options to be used simultaneously These options may also be installed in the field by qualified personnel PC Applications and Monitoring Sunny Boy operating data may be transmitted to and stored in a remote system or PC by one of the following methods 85 485 Data from up to 50 inverters is sent via RS 485 cable to a remote control unit or to a PC Maximum length of cable is 4000 1200 An RS 485 232 converter may be necessary for communication with a PC e Wireless Data from up to 4 inverters is sent to a Sunny Beam via radio signal The maximum communication distance depends on the respective environment Sunny Data Control This PC application is used to communicate with the Sunny Boy Control products It can be used to monitor multiple inverters download historical system data and adjust system parameters It can also send system data to the Sunny portal server via analog modem or ethernet Sunny Boy Control Plus The Sunny Boy Control Plus provides continuous monitoring and data acquisition of your PV system Sunny Beam The Sunny Beam is a wireless desktop system monitor It works together with the Sunny Beam Piggy Back card and provides wireless communication with up to four Sunny Boys in the PV plant Its graphical display shows a bar chart of actual power production as well as daily and total energy yields in a single window
77. r to calibrate its internal systems but not enough to begin normal operation Typically the calibration lasts less than 10 seconds and then the inverter resumes normal operation PV voltage must remain gt PV Start Voltage setting for the period of the P Start parameter setting See Section 8 The inverter will also show this status if it has been manually set to STOP mode Waiting 3 AG J ww 5 ls Green LED blinks ones per second The inverter has determined that there is enough voltage from the array to operate and is checking the condition of the grid prior to connecting to it i Information If the inverter fails to connect to the utility grid 3 times in a row it will wait 10 minutes before the next attempt In case of a grid failure the Sunny Boy waits 5 minutes before it tries to reconnect to the grid 80 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG Displays and Messages Normal Operation Green LED is on The inverter is feeding the utility grid in either MPP Constant Voltage or Turbine mode MPP Mode The Sunny Boy adjusts the voltage and current from the PV array to obtain the greatest PV output power Constant Voltage Mode The voltage from the PV array has been set to a fixed value This value is set by using the Sunny Boy Control or the Sunny Data software The parameter name is V Const This mode is typically used for fuel cell or micr
78. requency PWM AC Operating Voltage Range 183 229 208 V nominal 211 264 240 V nominal 244 305 277 V nominal AC Operating Frequency Range 59 3 60 5 60 Hz Peak Power Tracking Voltage 250 480 V DC Range of Input Operating Voltage 250 600 V DC Maximum DC Power SB 5000US 5300 W SB 6000US 6400 W SB 7000US 7500 W Maximum Array Input Power DC STC SB 5000US 5300 W SB 6000US 7400 W SB 7000US 8500 W Maximum AC Continuous Output Power SB 5000US 5000 W SB 6000US 6000 W SB 7000US 7000 W Current THD Less than 4 Output Power Factor 0 95 1 0 Peak Inverter Efficiency SB 5000US 96 8 SB 6000US 97 0 SB 700005 97 1 CEC weighted efficiency SB 5000US 95 5 SB 6000US 95 5 208 240 V AC SB 6000US 96 0 277 V AC SB 7000US 95 5 208 V AC SB 7000US 96 0 240 277 V AC Cooling fan temperature speed controlled PV Start Voltage 300 V DC Installation Guide SB50US 70US 1US090523 109 Technical Specifications SMA Solar Technology AG Maximum AC Continuous Output Current SB 5000US 24 A SB 6000US 29 A SB 7000US 34 A Maximum DC Input Current SB 5000US 21 A SB 6000US 25 A SB 7000US 30 A Maximum input short circuit current 36A Maximum input source backfeed current to input 50 A source Maximum Output Fault Current 57 6 A Maximum Output Overcurre
79. rid or a disconnected AC cable The Sunny Boy assumes that the public grid is down and disconnects from the grid in order to avoid islanding If the grid voltage is within the tolerable range and you still observe the failure message Vac Bfr or Vac Srr contact SMA America Disturbance VacL1 Bfr Voltage is too high or too low on the indicated VacL2 Bfr leg VacL1 Srr VacL2 Srr Disturbance VpvMax DC input voltage above the tolerable maximum IPV Overvoltage value IDisconnect DC Disconnect DC immediately Disturbance Watchdog Watchdog for operation control triggered 98 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Troubleshooting Error Type Disturbance Error Code XFMR Description Transformer is connected to the wrong grid Check the connection of the transformer In Delta corner grounded grids make sure that the Ground of the grid is connected to the terminal L2 In unbalanced 208 V and 240 V grids interchanging L1 and L2 may clear this error Disturbance XFMR TEMP F High transformer temperature the Sunny Boy stops working and the fans work with maximum speed Warning XFMR TEMP W High transformer temperature is gone The Sunny Boy starts working and shows the failure XFMR TEMP W Check the function of the fans Installation Guide SB50US 70US 1US090523 99 Maintenance SMA Solar Technology AG
80. ronics at start up PV voltage is not high enough to start Synchronizing to grid at start up MPPT range test at start up Sunny Boy is in MPP mode normal operation Sunny Boy is in constant voltage MPP mode Reduction of the grid feeding power due to abnormal heatsink temperatures Grid related fault condition self clearing Inverter fault user interaction required System warning advising further investigation SB50US 70US 1US090523 91 Displays and Messages 7 5 3 Sunny Boy Operating Parameters SMA Solar Technology AG N CAUTION performances The changing of operating parameters should only be performed by qualified personnel Changes to factory preset parameters may adversely effect inverter operation and Modifications of parameters marked with may result in changes to conformity with IEEE 1547 and should be approved by the local utility and or authority Table 7 1 Operating Parameters of the Sunny Boy Name Unit Range Default Password Description Level Antilsland Ampl deg 0 10 0 Installer Amplification of the Anti Island process Antilsland Freq mHz 0 2000 500 Installer Repitition rate of the Anti Island process CO2 Fact Ibs kWh 0 2 17 Installer The Sunny Boy evaluates the yield and indicates the approximate CO2 emission avoided by your Sunny Boy The amount of CO2 avoided is computed according to the kWh produced E total multiplied by t
81. sconnect s AC wiring knockout 6 Pull the AC wires through the conduit from the interior of the breaker box to the interior of the SMA DC Disconnect N CAUTION Avoid using wire nuts to join any wires together or to make any connections anywhere in the PV system Wire nuts are a frequent cause of unreliable resistive connections and ground faults Information E The terminal must be opened completely before you insert the cable Installation Guide SB50US 70US IUSO90523 53 Wiring the Sunny Boy SMA Solar Technology AG 54 Connect the AC equipment ground wire to the PE terminal labeled Q in the SMA DC Disconnect For 208 240 277 V connect the L1 AC line 1 or UNGROUNDED wire to the terminal labeled L1 in the SMA DC Disconnect For 208 240 V connect the L2 AC line 2 and N AC line N wire to the terminal labeled L2 and N in the SMA DC Disconnect For 277 V connect the N AC line N wire to the terminal labeled N in the SMA DC Disconnect Note For 277 V the L2 terminal is not used Connect the wires to the terminal blocks in the SMA DC Disconnect and tighten to a torque of 15 indb 1 7 Nm SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG 11 Use a screwdriver in order to poke a hole in the groove of the grommet inside the inverter 12 Remove the membrane 13 Pull the cable into the Sunny Boy 14 Pull the cable slightly back in order to seal the grommet 15
82. staller Description The time that the Sunny Boy waits to disconnect from the grid when Pac falls below minimum necessary Vpv T Stop Fan SC 100 55 Installer Fan turn off temperature V Const Setval 250 600 600 Installer PV Setpoint voltage for constant voltage operation These parameters only are important in case the parameter Operating Mode is set to V const Vac Min Installer Values are used to calculate the lower limit of allowable AC voltage Default value is optimal for installations lt 30 kW The default 12 results in a trip value of 88 as listed under trip limits Vac Max Installer Values are used to calculate the upper limit of allowable AC voltage Default value is optimal for installa tions lt 30 kW The default 10 results in a trip value of 110 6 as listed under trip limits Vac Min Fast 50 Installer Values are used to calculate the lower limit of allowable AC voltage for fast disconnection Default value is optimal for installations lt 30 kW The default 50 results in a trip value of 50 as listed under trip limits Vac Max Fast 20 Installer Values are used to calculate the upper limit of allowable AC volt age for fast disconnection Default value is optimal for installations lt 30 kW The default 20 results in a trip value of 120 as listed under trip limits Vac
83. tested and inspected before they are packed and shipped Although they are shipped in sturdy recyclable packaging damage can still occur during shipping It is important to carefully inspect the shipping container prior to beginning the installation If any external damage to the packaging makes you suspect the inverter itself could be damaged or if you find that the inverter is damaged after unpacking it report the damage immediately to your SMA dealer and to the shipping company that delivered the Sunny Boy If it becomes necessary to return the Sunny Boy use the original packaging in which it was delivered N WARNING The Sunny Boy weighs 145 Ib 65 kg To avoid injury be sure to use proper lifting techniques and secure the help of someone to assist in the unpacking and installation of the inverter If you need assistance with a damaged Sunny Boy contact your SMA dealer or SMA America Contact information for SMA America is provided below SMA America Incorporated 4031 Alvis Court Rocklin California 95677 4011 Tel 916 625 0870 Fax 916 625 0871 www sma america com 16 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Unpacking and Inspection 2 1 Scope of Delivery A B F G C Way P e E PP D gt Sunny Boy A one Sunny Boy B one wall mounting bracket x 16 screw and washer for closing the Sunny Boy cover spare two M x 10 screws and two M washers
84. the bracket N CAUTION Ensure that there are studs in the wall at the places where you intend to drill the mounting holes DO NOT use molly or toggle bolts to mount the Sunny Boy to sheet rock or panelling 4 Setthe bracket aside temporarily and drill holes at the marks you made on the wall 34 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG Mounting Information Tip for installing The diameter of the holes you drill must match the hardware you are using to mount the Sunny Boy For example if you are mounting the Sunny Boy to a concrete wall the hole diameter should be approximately the same as the outside diameter of the concrete anchors you intend to use If you are mounting the Sunny Boy on a wall that has wooden studs inside it the hole diameter should be the correct size for the lag screws you intend to use to mount the bracket It is recommended that the lag screws be made of stainless steel and the diameter of the screws closely match the diameter of the holes in the wall mounting bracket Make sure that the screws are long enough to penetrate the wall to a depth of 1 2 5 Insertthe screws through the holes in the wall mounting bracket and into the holes you drilled in the wall Tighten the screws until the bracket is held firmly against the wall see Figure 4 5 Do not overtighten the screws Installation Guide SB50US 70US IUSO90523 35 Mounting SMA Solar Technology AG
85. the electronic components 18 SB50US 70US 1US090523 Installation Guide SMA Solar Technology AG AC Voltage Configuration 3 2 Locating Internal Components Figure 3 1 illustrates the locations of the major internal components of the Sunny Boy Refer to this illustration as needed to locate particular components Figure 3 1 Sunny Boy Internal Components Installation Guide SB50US 70US 1US090523 19 AC Voltage Configuration SMA Solar Technology AG A Sockets for optional communication Piggy Back RS485 or wireless B Display C Status LEDs D Voltage Configuration Jumpers E Voltage Configuration Terminal Blocks F Ground Terminal PE G Output AC Line Terminals N L1 and L2 H PV Grounding DC Grounding electrode conductor Output AC Line Terminals L1 L2 N and PE J PV GROUNDED Terminal input from PV array K PV UNGROUNDED Terminal input from PV array L Combined UNGROUNDED Terminal M DC Terminal input from PV array N DC Terminal input from PV array Flat connection for grounding the cable shield for communication P Terminal for optional communication RS485 3 3 Configuring the AC Voltage The Sunny Boy may be easily configured for the different grid types commonly found in the U S The Sunny Boy is compatible with e 208 V AC output e 240V AC output e 277VAC output The Sunny Boy comes from the factory pre configured for utility interconnection at 240 V AC The Su
86. the terminal labeled PV Positive DC wire GROUNDED in the SMA DC Disconnect 3 Torque all wires in the terminal blocks inside the SMA DC Disconnect to 15 inb 1 7 Nm Installation Guide SB50US 70US 1US090523 69 Wiring the Sunny Boy SMA Solar Technology AG 5 9 Communication Wiring Various data communication options are available for the Sunny Boy These options are provided in the form of accessory Piggy Back modules that can be installed and connected either at the time the inverter is installed or at any time thereafter These modules are not included with the Sunny Boy Please contact SMA America for information Refer to the instructions included with the communication module for installation procedures The following subsections provide instructions for connecting the various communication cables between a Sunny Boy with a communication module and a personal computer PC The connection of a Sunny Boy to a Sunny Boy Control a Sunny WebBox or a Sunny Beam PV plant monitoring unit is shown in those respective manuals 5 9 1 RS485 Communication RS485 is a communication standard for bidirectional transmission of data between one or more Sunny Boy inverters and a PC i Information All Sunny Boy inverters are capable of RS485 communication You can mix different Sunny Boy models on the RS485 communication bus Requirements for RS485 Communication The Sunny Boy must be equipped with an RS485 Piggy Back communication modul
87. view of default settings settings for grids with no neutral and fan test settings Sa j e 00 N LII VET A B VA TN d m p gt gt 2298 mm ma Default settings E J e use Input Voltage Wires mm g 208 V Delta No Neutral or 91919108 208 Delta corner Grounded 240 V Delta No Neutral or 240 Delta corner Grounded E Fan Test Figure 3 4 Utility Configuration Jumpers 24 SB50US 70US IUSO90523 Installation Guide SMA Solar Technology AG AC Voltage Configuration Figure 3 5 and 3 6 below illustrate the proper jumper settings when connecting to a 240 Delta 120V Stinger type transformer or 240 Delta Corner grounded transformer respectively Note the order in which inverters are connected to the phases Jumper Setting Examples Inverter 3 Jumpers Settings Figure 3 5 Configuration Jumper Examples for 240 V Delta 120 V Stinger Inverter 3 Jumpers Settings re afete 240 L1 Figure 3 6 Configuration Jumper Examples for 240 V Delta corner grounded i Information When using 240 V Delta corner grounded or 208 V Delta corner grounded grids connect the L2 terminal to the grounded corner Installation Guide SB50US 70US IUSO90523 25 Mounting SMA Solar Technology AG 4 Mounting This section provides guidelines to help you select the best mounting locati

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