USER manual MAX 310 v1_1ac_SMS
Contents
1. Ethernet ADSL Cloud server Pc TABLET PC TABLET PC TABLET fy USER MANUAL INTRODUCTION 1 3 Hardware Structure of Solar Micro Inverter 260 Solar Micro inverter converts direct current DC generated from a single PV module to alternating current AC Each micro inverter use Maximum Power Point Tracking MPPT to maximize production of single PV module Micro inverter has several functional units Input filter on DC side decouples PV panel from high frequency transients during DCDC converter switching DC side power supply of the primary DCDC logic is active until minimum panel voltage is reached Primary DSP controller 16bit 7OMIPS high performance DSP calibrates analog system then starts to sample PV panel open circuit voltage After PV voltage reaches sufficient voltage for reliable start of main flyback power supply secondary AC side logic is turned on At this point power supply to both power sections is activated secondary DSP 32bit 60Mips controller is Started After successful connection with primary DSP controller secondary controller will execute auto calibration and after 10 seconds activate WMBUS RF module This delay is necessary for WMBUS module to stabilize operating parameters and also to avoid unnecessary power ON OFF cycling in case of low irradiation WMBUS module converts inverter serial data into 868Mhz data stream according to WMBUS standard Data from micro inverter2. The standard product warranty for Solar Micro inverter 260 and is 5 years It is possible to extend the system warranty to 7 years by registering to Letrika Sol at www letrikasol 10 Appendix 10 1 Technical specification sol By registering also Limited warranty for 25 years becomes valid All warranty conditions are available on the web side ty DC OPERATING PARAMETERS Maximum DC input power 310 Wp Maximum DC input voltage 60 V MPPT voltage range 22 55 V Operating range 15 60 V Start up DC input voltage 21V Maximum DC input current 10 5A Short Circuit DC input current 12 A Panel ripple current 50mA DC connection system Amphenol MC4 AC OPERATING PARAMETERS Nominal apparent power 290 VA Nominal real power 260 W Nominal reactive power 128 VAr at coso 0 9 Grid voltage range 185 270 V 1ph Maximum AC current 1 26 A Nominal frequency 50 Hz 47 5 50 5Hz Peak Power 15 min 290 W limited with ambient temperature e Dynamic with power Power factor range 0 8 1 e Dynamic with voltage frequency e Fixed between 0 8 to 1 Maximum overcurrent protection 2A Inverters per trunk 20 AC connection system Amphenol LTW SPS 03 connection system UL amp VDE approved 23 24 fy USER MANUAL APPENDIX AC PROTECTION Anti Islanding According to local standard Overcurrent 2A PERFORMAN
3. there is no derating in performances until 65 degrees ambient temperature is reached Open circuit voltages Uoc and short circuit currents Isc of PV modules shouldn t exceed the declared values in technical specification INSTALLATION PROCEDURE USER MANUAL 3 1 1 Landscape versus portrait panels placement Portrait or landscape layout could be used when installing more PV panels Layout of PV panels will affect the choice of trunk cable If the layout is portrait the distance between the connections on trunk cable are every 1 05 m If the layout is landscape the distance between the AC connections on trunk cable are every 1 70 m or 2 00 m Wumbher of modules 1 Tota trame tenghi Wm Total T cates lenght 22 Dies laitice balisa aililin jisticttiria Ta Landscape panels orientation Bannie cit aaa dii Tori hame banyat YE ih Twi AE abi ele 11 i Legii 11 i F P ae o a fas a ae r t Diamir Patera HH dinelliana Portrait panels orientation fy USER MANUAL INSTALLATION PROCEDURE 3 1 2 Mounting hardware compatibility Letrika Solar micro inverter is designed to be compatible with most standard Al frames During frame selection few important thing must be observed 3 1 21 Al profile selection Al profile must have a T shaped groove for M8 or M6 nut M8 screw inserted into T shaped groove If screw is inserted it is easier to place and fix the micro inverter Screws must be inserted before
4. can be received by Letrika data gateway or by any device compatible with WMBUS standard The power DCDC converter is started in constant current mode and high voltage Energy storage capacitor is charged up to minimum voltage needed for reliable start Voltage level in energy storage capacitor changes with grid voltage optimizing switching losses on power section Foiled Capacitors are use because they have lower aging compared with electrolytic capacitors Concurrently DSP2 algorithms are synchronized with grid and operating limits are checked Once DC voltage reaches minimum level AC inverter power stage is enabled grid disconnection relay if present is turned on and grid current is gradually according to standards limits increased DCDC converter switches to MPPT tracker mode and begins to track PV panel maximum power point A high speed w penes NN O j ii ABUS mog fia ile LA N Or a 7 g AT Microinverter simplified block diagram processor with special algorithm is used to achieve high efficiency and best possible harvest from sun Differential mode filters are used for filtering 50 Hz current from inverter carrier frequency Common mode EMC filters are used for EMC interferences filtering THD for Surge and Burst protections are used for protecting inverter from lightening phenomena s and grid over voltages It is Strongly recommended to install external overvoltage protection class Il on AC side
5. can operate even in event of one or 3 3 3 Three phase connection 16 a a a a a a atatatatalta 0 0 0 0 0 THRO late e e e s 0 0 0 0n0 020202020 HHHOO H 9 eotetete o im e i D om x 2 ecosecesese ecosesosese HHEEH HS d O a Bi Sna n n n lR IMR ths HT S i Iim r 7 gt w w TELER col _ G do P Il P g HED _ A fy pa Ls Roof junction box IP67 til Roof junction box IP67 Roof junction box IP67 tin iE min E tl min Interface Protection System INSTALLATION PROCEDURE USER MANUAL fy 17 3 3 4 Trunk cable extension and cable end covering Guidelines for trunk cable extension and cable end covering Insert CAP WTCASMA2 on exposed cable end since original are Showed below It s not allowed to extend the trunk cable water tight cap ensure IP67 protection of exposed trunk above maximum number of T junctions specified in Table 1 cable end Trunk extension is normally necessary when panels and micro inverters are mounted on different places on the roof making difficult to connect them only by using trunk cable If trunk extension is done by using customer supplied cable please note that the cable must be UV reinforced cable with cold bending 90 degrees at 40 90 maximum te
6. it is also condition for the validity of Limited Warranty INTRODUCTION USER MANUAL fy Solar Micro inverter is in standby until there is insufficient irradiance and a specific minimum voltage is present in the inverter The consumption in standby is OW The micro inverter starts to fully operate when the sun begins to Supply energy and the voltage in PV module reach 22Vdc When the voltage drops below the minimum voltage value 15Vdc feed in mode ends and the inverter switches off fy USER MANUAL SAFETY 2 Satety 2 1 Symbols legend used in this manual and or equipment CAUTION WARNING 2 2 Safety and general warnings WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING Generic danger Important safety infor mation Dangerous voltage All precautions and protections against high voltage electric Shock should be taken HOT SURFACE Danger of burns do not touch product Manual shall be consulted that must be available for future use and not damaged Letrika inverters must be installed only by technically qualified personal All electrical installations must be performed in accordance with local and national electrical Standards and codes Do not connect wet connectors Connectors must be dry before any attempt to connect them Do not cut bend or modify original connectors and or cables supplied with inverters Lightning protection must be placed on each inv
7. placement of surge protections also in between micro inverters improving surge immunity Please contact Letrika for details on surge protection devices INSTALLATION PROCEDURE USER MANUAL fy 15 3 3 1 Simple single phase connection with I P S device Inverters are simply connected to ALTW PT 3 trunk cable P S device may vary from country to country please See table 1 for maximum allowed number n of micro check with local distributor company inverters per trunk Not used T junctions on trunk cable must be covered with watertight cap Roof junction box IP67 Interface Protection System mMin Single phase system with P S 3 3 2 Single phase connection without P S interface to grid Since Letrika micro inverters have built in P S according without additional P S device interfacing to grid only grid to VDE 4105 standard with incorporated disconnection disconnection switch must be used relay they can be used if a local standard permits Simple Grid Roof junction box IP67 disconnection min switch Single phase connection without I P S inteface some countries also forbidden to operate with one or more phases Interrupted or in short circuit It is recommended to use protection against unbalanced load INSTALLATION PROCEDURE fy USER MANUAL two phase failure it is generally not recommended and in Micro inverters can be connected also on three phase grid system Although they
8. the frame is assembled since they can t be moved across frame junctions If M8 or M6 nuts are inserted into profile care should be taken during screw length selection since long screws can damage the AL profile or they cannot fix micro inverter adequately Use M8 or M6 screws and nuts Do not use smaller or larger screws for fixing the micro inverter Al profile width must match micro inverter fixing tab length There are several possibilities how to mount the inverter on the profile each with advantages and disadvantages 31 2 2 Inverter fixing screws positions Install the mounting screws M8 x 16 on the body of the supporting structure at intervals of 130 mm and installation of the casing by tightening the bolts to torque Nm 9 Do not over torque 130mm B Mpi aI D o a 13 5 mm max 3 1 2 3 Inverter cooling consideration For proper inverter operation and full performance delivery some mounting guidelines must be observed Although micro inverter does not need any forced ventilation and is cooled by natural heat exchange with surrounding air it still need some air around its aluminum enclosure to cool efficiently We strongly suggest to place micro inverter at least 15mm bellow the panel surface and to leave at least 20mm between inverter and underneath surface to avoid panel heating and micro Inverter overheating Micro inverter can be positioned above or below Supporting Al frame as indicated on dra
9. types of cables are available UL and VDE approved while connectors are always the same Cables and plastic materials are chosen and tested under most harsh conditions imaginable and they are UV salt fog oil temperature and bending resistant Please do not cut disassemble or modify connectors and cables Do not use matching products that are not produced by ALTW since cable performances can be altered and possible dangerous situations may occur In addition to two basic connectors some more additional connectors are available for cable ending or joining Trunk cable ID Panels orientation Max number of T connectors on trunk PT 3 4A 105 00 020 EU Portrait 20 PT 3 4A 170 00 018 EU Landscape 170 cm panels 18 PT 3 4A 205 00 017 EU Landscape 205 cm panels 17 PT 3 4A 105 00 020 UL Portrait 20 Table 1 Trunk cable types and maximum number of micro inverters per trunk Figure 13 ALTW trunk cable drawing 10 6 2 Accessories For easier waterproof cable elongation end ending some additional accessories are available 10 6 2 1 Waterproof cap Waterproof cap is used as watertight cover on unconnected T junctions on trunk cable White plastic cap originally attached on T junctions IS NOT watertight it is there only for dust and mechanical protection during transport and installation In case some T junctions are left unconnected use this cap to water tight the junction APPENDIX USER M
10. ANUAL y Part Numbar PT 3 4A XXX 00X Pie a CONN KX Igme Pich 1 OSM Able to make 00 100T i Pitch 1 70M Able to maka 001 060 Ham Pigh 2 05M Abie lo make 001 OT CAP WSMMEFLA P1 2 A y USERMANUAL APPENDIX 10 6 2 2 Cable end cap Cable end cap is used for watertight closing of exposed cable end Simply push the cable into end cap the wires inside the cable are automatically separated to avoid Short circuits and tight the nut Always use original trunk cable with this end cap Waterproofness is not guaranteed with other cable types 10 6 2 3 Cable joiner Cable joiner is used to join two ends of trunk cable It is simple to use and after assembled IP67 protected cable joining tool To assemble two cable ends together please consult bellow picture CAP WTCASMA2 CX 04BCM32 7002 CONTACT USER MANUAL 11 Contact Letrika Sol d d is a joint venture between Cosylab d d and Letrika d d Headquarters Letrika Sol d o o Vrtobenjska 64 5290 empeter pri Gorici Slovenia SMS Metering Ltd SolarCorner 41 London Road Castle Court Reigate RH2 9RJ TEL 0845 604 7244 E mail sales smsmetering co uk E info sol letrika com Web www smsmetering co uk www letrikasol com T 00386 5 339 4262 Ny
11. CE Peak Efficiency 961 CEC Efficiency 95 5 EURO Efficiency 95 3 MPPT tracking Efficiency 99 9 Stand by consumption OW ENVIRONMENTAL Ambient temperature 40 65 C no derating Relative humidity 0 100 Ingress Protection Rating IP 67 Maximum altitude 2000m Noise 30db A 1m Cooling Natural Dimensions 209x243x38mm with brackets Mounting brackets M8x16 distance 130 mm Weight 2200g Housing Die casted aluminium Communication WMBUS EN 13757 1 5 Lifetime expectancy 25 years Limited Warranty 25 years VDE 4105 CEI 0 21 Standards EN 62109 1 EN 62109 2 EN 61000 6 3 Isolation Level HF transformer reinforced insulation Safety class Overvoltage Category Arteta 10 2 Certificate Solar Micro Inverter 260 was tested in accreditation laboratory according to international standards Certificate can be downloaded at www letrikasol si APPENDIX USER MANUAL fy 25 10 3 Identification and oredring code Ordering code AEI 1101 S C70 P260 F50 U230 VDE ALTW G Where AEI Family name 1101 Family member 5 Input type S is for solar photovoltaic DC input C70 Cells on PV panel P260 Output power 260W F50 Output frequency 50Hz U230 Output voltage 230Vac VDE Settings according to standard VDE4105 other CEI for CEI 0 021 G83 CSL ALTW type of AC connector G for grid connection 10 4 Dimensions 221 2 Connector type Amphenol H 6mm H4CMC4DMS Cable type TE 1 956298 4 Cable length 200415 mm Connect
12. Letrika documents protection provided by the equipment may be impaired fy USER MANUAL INSTALLATION PROCEDURE 3 Installation procedure During installation it is a good idea to follow a check list of operations We will describe general approach that allows installation of the inverters that is easy to manage and maintain 3 1 Compatible PV modules Letrika micro inverters are compatible with monocrystalline and polycrystalline panels with 60 and 72 cells per panel Thin film panels are normally not suitable because of higher panel dc voltage incompatible with micro inverter input range However some thin film panels with output voltage of approx 50V can still be used with Letrika micro inverters Thin film modules have a risk of TCO corrosion Consult the producer of thin film panels how to ground the positive or negative terminal of the PV module Letrika Solar micro inverter 260 allows using the positive or negative grounding PV modules from 220Wp up to 310Wp can be connected to the inverter Using lower power PV modules the micro inverter power is not entirely used efficiency is lower and this affect the production of electricity When higher power PV modules are used consider that the micro inverter can deliver approx 300W of AC power for approx 20 minutes at 30 C During selection of PV modules power consider also average and peak operating ambient temperature From the point of view of micro inverter performances
13. PV modules Preferably on upper side to avoid prolonged submersion of inverters into water or snow Do not left inverters unfixed on the roof 2 3 General installation safety guidelines The installation must be wired according to local regulations and standards where inverters are mounted Follow local guidelines for grid monitoring devices and other Safety devices to be located between inverters and grid CAUTION WARNING WARNING WARNING WARNING Grounding of all metal parts of the con struction is the responsibility of installer Micro inverters generates power from more than one source When micro inverter is connected to PV module and exposed to light dangerous voltages may appear on output in case of malfunction Inverters with damaged enclosure or wiring must not be repaired and must be returned to producer It is forbidden to connect DC input of micro inverter to the battery or any other DC power supply Solar micro inverter can be connected only to PV module WARNING CAUTION CAUTION CAUTION SAFETY USER MANUAL fy Use only originally supplied cables Use original end cap from ALTW cable producer to ensure IP67 protection on whole cable trunk Connect circuit breaker with overcurrent protection according to PV plant power and local standards Always fix cables to the frame Do not allow PV and grid cables to float free If equipment is not used as specified in this manual and other
14. by hardware Possible cause is very high short circuit current very CURRENT_HW deep voltage transients or high voltage surge spikes Proposed action e Check connecting lines e Check surge protections on lines e Check external power capacitors banks for power factor corrections e Scan grid voltage for deeps 3 ERR_OVER_ This signal is active if DC high voltage too high VOLTAGE Possible cause for DC high voltage to rise above safety limits is very unstable grid with changing shadows on PV module Proposed action High voltage spikes from grid are transferred to DC high voltage capacitors Check grid voltage and transients fy USER MANUAL TROUBLESHOOTING 4 ERR_UNDER_ DC high voltage is too low During operation on high output power deep shadowing occurred VOLTAGE It is possible that DC voltage drops too low and it is not possible to push the current into the grid Proposed action e Check DC connectors e f under voltage is repeated on same panels check all connections 5 ERR_ADC Internal circuit problem Internal circuit calibration failed Proposed action e Replace inverter 6 ERR_PANEL_ Panel voltage is too low to operate Inverter detected too low voltage on PV panel to ensure VOLTAGE_LOW correct energy transfer to secondary side Proposed action e Wait panel voltage to rise up if this error insist under heavy sun then check panel voltage or replace inverter 7 ERR_OVER_ DC or AC side power section
15. ers system integrators and other qualified personnel with knowledge of local Standards and regulations They should always follow local electrical safety and fire protection guidelines Only technically qualified personnel should install or replace Letrika Micro inverters USER MANUAL Table of contents 1 1 1 1 1 1 2 2 1 2 2 2 3 3 1 3 1 1 3 1 2 3 1 2 1 3 1 2 2 3 1 2 3 3 2 3 3 3 3 1 3 3 2 3 3 3 3 3 4 4 1 4 2 5 1 10 10 1 10 2 10 3 10 4 10 5 10 6 10 6 1 10 6 2 10 6 2 1 10 6 2 2 10 6 2 3 11 Introduction Main features PV Power Plant with Letrika Solar Micro inverters 260 Hardware Structure of Solar Micro Inverter 260 Safety Symbols legend used in this manual and or equipment Safety and general warnings General installation safety guidelines Installation procedure Compatible PV modules Landscape versus portrait panels placement Mounting hardware compatibility Al profile selection Inverter fixing screws positions Inverter cooling consideration Connecting cables to micro inverter Connecting micro inverter system to utility grid Simple single phase connection with I P S device Single phase connection without PS interface to grid Three phase connection Trunk cable extension and cable end covering Commissioning Preliminary checks Sequence of operations Troubleshooting List of errors in alarm list Storage Disposal Maintenance Registration and warranty Appendix Technical spec
16. erters branch Avoid wiring loops or rings Keep cable paths short as possible Inverter and all metal components must be grounded according to local standards Inverter PV side is galvanically separated from dangerous voltages however do not attempt to disconnect PC cables from inverter during operation Always mount grid disconnection switch be tween micro inverter installation and grid There are no user serviceable parts inside Letrika micro inverter It is strictly forbidden any intervention on micro inverter internal Structure CAUTION HOT SURFACE CAUTION CAUTION CAUTION Connection to ground protection Note Please read paragraph marked with this icon carefully In case of fault on PV installation with Letrika micro inverters do not attempt disconnect PV or grid cables from inverters or junction boxes until qualified personal checks the installation Metal surface of Letrika micro inverters can reach more than 70 degrees in operation To reduce risk of burns do not touch the inverter while in operation After switching off micro inverter wait at least 10 minutes before touching it If required by local standards AC wiring must be additionally protected with RCDs and Earth Fault Monitors where required Before starting inverters for first time inspect the wiring measure isolation resistance be tween PV PV and protective ground Micro inverters should be mounted on aluminum frame holding the
17. ification Certificate Identification and oredring code Dimensions Compatible dc connector systems Compatible AC connector system Trunk cable data Accessories Waterproof cap Cable end cap Cable joiner Contact y o o oo Aan A RR 10 11 12 12 12 13 14 14 15 15 16 17 18 18 18 19 19 22 22 22 23 23 23 24 25 25 26 26 26 27 27 28 28 29 fy USER MANUAL INTRODUCTION Introduction 1 1 Main features Nominal Apparent Power 290 VA at power factor f 0 9 Nominal Real Power 260W Nominal Reactive Power 260 VAr at 0 95 Max Reactive Power 260 VAr Great efficiency 96 1 Large voltage and power input range corresponds to the majority of PV modules Reactive power capability wide range Dynamic power factor Incorporated relay for safe grid disconnection Galvanic isolation of DC side from AC side with HF transformer Low ripple current 0 0 W standby consumption VWMBUS standard wireless communication DC circuit is isolated and insulated from ground Quick installation Full power at ambient temperature 65 C Die cast aluminum enclosure with completely potted electronics IP 67 dust tight no ingress of dust immersion in water up to 1m for 30 minutes Foiled capacitor long life Design flexibility Letrika 50 years experience in automotive and heavy duty electronics and electro mechanics Protection Function Over and under voltage protection Over and under frequency protecti
18. iil SMS metering Letrika MAX310 BEESMART SOLAR MICRO INVERTER 260 USER MANUAL fy USER MANUAL Copyright All rights with respect to this document including applications for patent and registration of other industrial property rights are reserved Unauthorized use in particular reproduction or making available to third parties is prohibited Disclaimer of liability This manual only describes the product and is not a warranty of performance or characteristic Contents of the manual has been reviewed against the hardware and software described Any liability can be accepted for any errors or omissions contained in the information given The installation handling and use of Letrika micro inverters are beyond company control Letrika d d does not assume any responsibility for loss damage injury or expense resulting from the improper installation handling use or maintenance This user manual only describes the product and is not a warranty of performance or characteristic We reserve the right to change this document at any time without notice Trademarks Letrika Sol d o o is registered trademarks of the Letrika d d All other brand or product names mentioned in this document may be trademarks or registered trademarks of their respective holders Who should read this manual This manual is intended to be used during installation commissioning and maintenance as a reference for install
19. ling it Check the contacts that are not oxidized 7 Disposal The owner of micro inverter must dispose it in accordance with local directives and regulations It is forbidden to deposit electrical and electronic equipment as municipal waste The complete procedure after lifetime should comply with Directive 2012 19 EU of the European Parliament and of the Council of 4 July 2012 on waste electrical and electronic equipment WEEE 8 Maintenance Micro inverter should be inspected and cleaned if necessary at least once a year It is recommended to regularly check for signs of damage Regularly check for dust dirt and moisture If necessary clean the device For cleaning use compressed air a vacuum Cleaner or Special brushes Micro inverter can be send back to manufacturer or provider for disposal Delivery costs in this case are covered by sender or owner Component and material identification e Housing Aluminum e Filler PU e Gaskets and seals Rubber Teflon Viton e Electrical cables Copper Rubber e Conduits Polyethylene Nylon e HF Transformer Fe Although original cable system used on Letrika micro inverters is State of the art with extra long live resistant to water UV temperature oil and moisture we suggest to check connections between Inverters every year Special attention should be placed on junction boxes where most of bad connections and problems can occur USER MANUAL 9 Registration and warranty
20. mperature Always use original cable joiner CX O4BCM32 7002 to ensure trunk cable join point water tightness Interface Protection System Waterprof cap CAP WSMMFLA P1 ee Cable joiner Cable end cap CX 04BCM32 7002 CAP WTCASMA2 Roof junction box IP67 min Figure 12 Trunk cable extension and cable ending fy USER MANUAL COMMISSIONING 4 Commissioning Commissioning should be done by technically qualified personal Connecting cable output AC and DC voltage input cables should be carried out in accordance with the manufacturer s instructions AMPHENOL 4 1 Preliminary checks e Check the data on micro inverter and verify compliance e Check the position of all connection cables and the of these data with grid data tightness of all nuts and terminals e Peel the label with Serial number and attach it to the e Check the micro inverter is firmly mounted matrix in the same order as they are installed e Ensure that all electrical safeguards have been correctly e When conducting the checks ensure that the main AC installed disconnector switch downstream from the system and any other possible isolation switches are switched off position Ensure that the complete system has been checked tested and approved in accordance with the local Standards and codes e Ensure that all conductors and protective grounding points are connected 4 2 Sequence of operations e Switch on the main AC disconnector switch dow
21. nstream from the system and any other possible isolation switches e Proceed with configuration of Gateway Details are described in Gateway User Manual 5 Troublesnooting The operating state of the micro inverters can be monitored on the Gateway LCD LCD shows the status of the plant on default view In normal operation the status is working it means that everything is OK If an internal or external fault occurred the LCD displays Status alarm Gateway stores errors in alarm list which TROUBLESHOOTING USER MANUAL fy 19 can be at any time retrieved from it with web application The inverter will not feed the grid while the alarm on LCD is present Only technically qualified personal may perform work on electrical installation VIEW r ALARM HISTORY PanelID amp MicroinverterID Time Y Alarm no A Error Al 494 000001EE 6 januar 2015 14 58 46 15 ERR CRIO DISCONNECTED AZ 496 000001F0 6 januar 2015 14 58 36 12 ERR_CRID_FREQUENCY Al 494 000001EE 6 januar 2075 14 58 35 15 ERR_GRID_DISCONNECTED Example of Alarm history from web application 1 ERR_OVER_ Over current on AC side is detected by software CURRENT_SW Possible cause is short circuit on grid lines or sudden voltage drop on grid lines Proposed action e Check connecting lines e Check surge protections on lines e Check external power capacitors banks for power factor corrections e Scan grid voltage for deeps 2 ERR_OVER_ Over current is detected
22. on Anti Island protection Surge protection device SPD integrated Mains Monitoring Switching Device MSD integrated according to VDE 4105 INTRODUCTION USER MANUAL ty 1 2 PV Power Plant with Letrika Solar Micro inverters 260 PV power plant with Letrika Solar Micro inverters 260 consists of several components PV module directly convert sunlight into DC electricity micro inverters change electrical current from DC to AC Electricity is then transferred via trunk cables junction boxes and main distribution switch to the grid Each PV module is directly connected to Letrika Solar Micro inverter 260 PV module and micro inverter is individual power unit operating at maximum available power The operation of such power unit is independent and does not affect the operation and performance of other power units 2 wir Linux based gateway with bocal 16GB storage Witl AMB US Ethernet as standard GPRSIGSM aa cion WE Tablet PC SmartPhone PV modules of different characteristic can be installed in different position and orientation without interfering with each other The operation of micro inverters can be controlled via Linux based Gateway Gateway communicates over wireless WMBUS with Letrika Solar micro inverter 260 and over a Wi Fi or Ethernet with computer smart phone or tablet We can monitor and analyze individual micro inverters or the whole power plant using browser on computer smart phone or tablet
23. onnectors together until they latch with audible CLICK Some DC connectors are marked with and engraved on plastic Polarity is valid for panel side On micro inverter we placed two additional colored signs on DC wires BLUE for DC and RED for DC wire Please take care about right polarity while connecting inverters Before connecting the inverter measure voltage polarity on PV module Insert AC connector from inverter into T junction connector on the cable Again push connectors until audible CLICK is heard and connector is latched Connecting cables to micro inverter 3 3 Connecting micro inverter system to utility grid Micro inverter must be connected to the utility grid in accordance with local standards and permissions Letrika Solar micro inverter 260 has built in interface protection system IPS according to VDE 4105 All frequency voltage and anti islanding protections are embedded inside micro inverter Also power factor voltage control functions are built in Inside micro inverter is a relay with double contacts to physically disconnect micro inverter from the grid External IPS must be connected between micro inverters and grid if required by local standards and permission We strongly suggest to mount surge protection devices into roof junction box or better to use surge protector systems that are mounted in same housing as micro inverter and can be connected to standard ALTW PT 3 wire system allowing
24. or type Amphenol H4 6mm H4CFC6DMS Cable type TE 1 956298 4 Cable length 200415 mm ss le 7 r ic Connector type Amphenol SPS O3AFMM LL7E01 Cable type TE 1 956298 4 Cable length 950440 mm SOLAR MICRO INVERTER 260 P N 11 261 005 AEI1105 S C60 P260 F50 U230 AS ALTW G Pmax 310 Wp Umax 60 V Uvprt 21 55 V I max 10 5 A Iscmax 12 5 A AS4777 Made in Slovenia fy USER MANUAL APPENDIX 10 5 Compatible dc connector systems PV connectors are compatible with MC4 standard connectors On request other types of connectors are available Amphenol LTW H4 connection system 10 6 Compatible AC connector system Amphenol ALTW connection system is composed from one single AC cable from micro inverter and trunk cable where up to 20 inverters can be connected Both AC cable and the trunk are equipped with locking connectors that can be separated by using special unlock key and they are IP67 rated Reliability current capability and lifetime are considerably increased by using direct trunk connector and cable molding technology and by using insulation displacement main cable contacting without interruption of main cable 10 6 1 Trunk cable data Very important is to choose the right trunk cable pitch depending on panel dimensions and orientation Consider that also maximum number of micro inverters per trunk change with connectors pitch See bellow tables and drawings for details Two
25. over temperature TEMPERATURE_ Temperature on DC or AC power section reached maximum allowed temperature approx 90 CONTROLLER degrees centigrade Proposed action e check ambient temperature is lower then 65 degrees e check inverter exposure to direct sun light e air is not circulating across inverter enclosure 8 ERR_PARAMETERS_ Internal Country and other parameters corrupted CORRUPTED Internal FRAM memory corrupted Proposed action e Replace inverter 9 ERR_ADC_OFFSET_ Internal ADC offset to high ERROR Internal analog to digital converter offset is out of adjustable range Proposed action e Replace inverter 10 ERR_INTERPROC_COM CRC error in interprocessor communication An CRC error occurred between both DSP controllers on inverter Proposed action e Error should reset automatically after some time if not replace inverter 11 ERR_GRID_VOLTAGE Grid voltage to high or too low Grid voltage is out of limits according to country standard Proposed action e Too much inverters on grid line e Installation close to grid low voltage transformer e Grid without power factor correction capability TROUBLESHOOTING USER MANUAL Wy 21 12 ERR_GRID_FREQUENCY Grid frequency out of range Grid frequency is out of range prescribed in standard for given country Proposed action e Verify grid frequency if condition insist or this error is noticed on all inverters in installa tion e Check for locally installed generator
26. s other solar installations or wind turbines which can cause frequency slipping e Check for islanding operation of the inverters 13 ERR_SYSTEM_SW Firmware CRC error Inverter firmware auto test detected firmware CRC error in one of DSP controllers Proposed action e Replace inverter 14 ERR_COMMUNICATION_ No communication between DSP processors TIMEOUT Main DSP processor can not see any communication from DCDC DSP controller Proposed action e Wait inverter to reset during the night If condition persist replace inverter 15 ERR_GRID_DISCON No grid NECTED Grid is disconnected or internal PLL can not catch any valid sinusoidal signal Proposed action e No grid connected very distorted grid current very low grid voltage 16 ERR_IGRID DC_COMPO DC current injected to grid is too high NENT Internal circuit detected too high DC current injected to grid If condition is rare than some transients can cause inverter to trigger this error Proposed action e f condition repeats continuously then check other sources on the grid that might cause DC current in it restart inverter or if condition persists replace inverter 17 ERR_FAST_LOOP_INT Internal firmware errors safety shut down Proposed action 18 ERRSLOW_LOOP_INT if problem persist replace inverter 19 ERR_STATE_MACHINE fy USER MANUAL 6 Storage The equipment must be stored in suitable warehouses After long period of storage clean accurately micro inverter before instal
27. wings bellow Placing micro inverter on bottom side of Al Support decrease heat transfer from micro inverter to solar panel increasing efficiency on high ambient temperatures Mount micro inverter in locations which are out of direct sunlight We do not recommend mounting micro inverter directly between panel and roof surface since air irculation is not guaranteed Efficiency of the system will be decreased and the micro inverter and the panel can be overheated if mounted like shown on bellow drawing If micro inverters are mounted as showed above Warranty period is voided INSTALLATION PROCEDURE USER MANUAL fy 13 a ls g z F a peor a eed Min 20 mum a au P L 1 YM Recommended mounting for optimal heat dissipation micro inverter on bottom side of supporting frame CLOEEOPEELEELEEE ED MALL ELEEEEPLEEEPEPEPEEEPEEEED EEE PEEL Recommended mounting for optimal heat dissipation micro inverter on top of supporting frame Forbidden micro inverter mounting fy USER MANUAL It is a good practice to mount inverter in the middle of the panel width regardless if the panel is placed in portrait or landscape position INSTALLATION PROCEDURE Panel width F Horizontal placement of the inverter 3 2 Connecting cables to micro inverter Connecting cables to micro inverter is simple Just connect DC cables connectors into matched panel DC connectors coming from panel junction box Push c
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