Install and Supervise Guidelines for Accredited
Contents
1. System voltage stc On switchboard to which inverter is directly connected is permanently fixed at the main switch is permanently fixed at the solar main switch If the solar system is connected to a distribution board then the following sign is located on main switchboard and all intermediate distribution boards Where the inverter is not adjacent to the main switchboard location information is provided Is permanently fixed on array junction boxes black on yellow Fire emergency information is permanently fixed on the main switchboard and or meter box if not installed together PV DC isolation is clearly identified Is placed adjacent to the inverter when multiple isolation disconnection devices are used that are not ganged together Exterior surface of wiring enclosures labelled SOLAR at 2 m intervals Any other signage as required by the local electricity distributor Minimum insulation Test voltage resistance MQ 1 25 lt 120 250 0 5 120 500 500 l 500 l GRID CONNECTED SOLAR PV SYSTEMS 28 INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ISSUE 10 2 SEPTEMBER 2015 12 4 Micro Inverter and AC Module Installation and commissioning sample INSTALLATION DETAILS Array frame is certified to AS1170 2 for installation Array f2. 6 1 3 1 Job set up 6 1 3 2 Mid installation check up 6 1 3 3 Testing and commissioning 6 1 4 Sign off is defined as the installer or supervisor performing the testing and commissioning requirements stated in section 11 6 1 5 The date of sign off is the day that the installer or supervisor performs the testing and commissioning requirements Note It is vitally important that a system is tested as per the commissioning requirements of this document to ensure it is safe at the time of final sign off mM GRID CONNECTED SOLAR PV SYSTEMS 6 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS 1 ACCREDITED ISSUE 10 2 SEPTEMBER 2015 6 2 Limits apply to the number of installations an accredited person shall sign off per day 6 2 1 Where an accredited person is installing or supervising complete installations only they shall not sign off on more than three 3 installations per day 6 2 2 Where an accredited person is installing or supervising complete installations and upgrades repairs the installation or replacement of panels only in the same day they shall not sign off more than two 2 complete installations and more than three 3 upgrades on the same day 6 2 3 Where an accredited person is installing or supervising upgrades and or repairs to existing systems involving the installation or replacement of panels only the installer or supervisor shall not sign off on more than five 5 system upgrades
3. 2 SEPTEMBER 2015 7 376 INSTALLER a J 3 8 3 1 Where the inverter is not adjacent to the switchboard to which it is connected an isolator shall be provided at the inverter so that a person operating the switch has a clear view of any person working on the inverter refer to AS NZS 3000 7 3 4 8 3 2 Connection of a c and d c components in the same enclosure shall not be mounted on a common conductive mounting rail 8 3 3 and d c circuits within enclosures shall be physically segregated by an insulation barrier see AS NZS 5033 2014 clause 4 4 4 3 Note this is to reduce the chance of a c and d c cables coming in to contact with each other 8 3 4 Where the inverter and isolator are exposed to the weather the isolator shall have an IP rating of at least IP 55 Note the CEC recommend using isolators rated to IP66 8 3 5 Where an isolator is exposed to the weather the CEC recommend that there be no top entries into the isolator and drip loops should be utilised at the bottom of the isolator to minimise water ingress Conduit entry at bottom of isolator drip loop 8 3 6 Micro inverter installation 8 3 6 1 A labelled lockable isolating switch inverter a c isolator shall be installed at the point of transition from micro inverter interconnect cable to fixed wiring The purpose of the a c isolator is to de energise the a c from the micro inverter for maintenance or fault rectificatio
4. 2 3 All low voltage work gt 120V DC or gt 50V AC shall be performed by a licensed electrician A licensed electrician is required to be responsible for the safety of the system wiring prior to connection of the system to the grid If the system contains ELV wiring installed by a non licensed person then a minimum level of inspection by the electrician prior to closing the PV array isolators would include 4 2 3 1 an open circuit voltage test on each PV string and on the total array 4 2 3 2 visual inspection of an open PV junction box randomly selected and the master array junction These inspections checks shall confirm the array voltages are as designed and specified the appropriate cables cross sectional area and insulation junction fittings and enclosures have been used An accredited non electrician ELV installer is expected to carry out these checks iun GRID CONNECTED SOLAR PV SYSTEMS 5 dM INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS b ACCREDITED ISSUE 10 2 SEPTEMBER 2015 dmt INSTALLER a V md 5 DOCUMENTATION All complex systems require a user manual for the customer Grid connected PV systems are no different The following system installation documentation shall be provided as specified in AS NZS 5033 The documentation can be either supplied in hard copy or electronic form at the customer s discretion Where the accredited install
5. SOLAR PV SYSTEMS 2 dE cLeANeNercycounc INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ACCREDITED ISSUE 10 2 SEPTEMBER 2015 amt INSTALLER or I DM 1 d Br ERE Ld un fee 9 METERING 25 10 SIGNAGE 25 11 COMMISSIONING 25 12 INSTALLATION AND COMMISSIONING 26 12 1 General 26 12 2 Insulation resistance measurement 26 12 3 String Inverter Installation and commissioning sample 26 12 4 Micro Inverter and AC Module Installation and commissioning sample 29 13 ATTACHMENT 1 DANGEROUS SITUATION 32 14 ATTACHMENT 2 PV ARRAY ROOF MOUNTING 32 These guidelines have been developed by Clean Energy Council They represent latest industry best practice for the installation of grid connected PV systems Copyright 2015 While all care has been taken to ensure these guidelines are free from omission and error no responsibility can be taken for the use of this information in the installation of any grid connected power system P GRID CONNECTED SOLAR PV 3 b ECEH EE LEM cM SC CLEAN OEDITE INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS a ACCREDITED ISSUE 10 2 SEPTEMBER 2015 dmt INSTALLER 1 GENERAL The objectives of these guidelines are to e improve the safety performance and reliability of solar photovoltaic power systems installed in the field e encourage Industry Best Practice for all design and installation work involving solar photovoltaic power systems e pr
6. an RCD in lieu of mechanical protection See Clause AS NSZ3000 3 9 4 4 If this is the case an inverter cannot be connected to that sub main due to the connection of the RCD In accordance with AS NZS 3000 the cable between the switchboard and inverter requires protection so it is recommended that the isolator is a suitably rated circuit breaker 8 6 Shutdown procedure A shutdown procedure is required to ensure safe de energisation of the system 8 6 1 8 6 2 The shutdown procedure shall reflect the specific requirements of the individual system All isolating switches referred to in the shutdown procedure shall correspond to individual isolator labels E g PV array DC isolator Solar Supply Main Switch For central inverter systems an engraved label showing the shutdown procedure shall be installed adjacent to the inverter An example shutdown procedure would be as follows e Turn off the main switch solar supply at the AC switchboard and then the AC isolator at the inverter where installed then e Turn off the PV array isolator at the inverter aiin GRID CONNECTED SOLAR PV SYSTEMS 23 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS zd ACCREDITED ISSUE 10 2 SEPTEMBER 2015 a Pi WARNING PV array DC isolators do not de energise the PV array and array cabling see below for example 8 6 3 Micro inverter and AC module systems shall be installed at the switchboard to whi
7. block e Class e g a hotel motel boarding house or guest house e Class 10a e g a private garage carport or shed 7 1 2 Modules that are electrically in the same string shall all be installed at the same tilt angle and orientation unless using DC conditioning units 71 3 Unless specified by the CEC system designer the installer shall not install two parallel strings connected to the same MPPT input at the inverter installed on different orientations e g east and west Note Some manufacturers will not guarantee inverter performance where parallel strings are installed on different orientations The system designer shall confirm that this arrangement is acceptable with the inverter manufacturer A minimum tilt of 10 is recommended to take advantage of self cleaning during rain events Where modules are installed at a tilt angle less than 10 the customer shall be advised about the need for more frequent cleaning of the modules and this should be included in the recommended maintenance schedule 7 2 Roof mounting not building integrated 7 2 1 All array supports brackets screws and other metal parts shall be of suitable low corrosion materials suitable for the lifetime and duty of the system that do not increase their rates of corrosion when mounted together in an array and when mounted on the surface of the underlying structure This may include techniques to minimise corrosion rates appropriate to the local environment
8. by qualified licensed electrical tradesperson electrical tradesperson xin GRID CONNECTED SOLAR PV SYSTEMS 26 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS zd ACCREDITED ISSUE 10 2 SEPTEMBER 2015 INVERTER PV array isolator mounted adjacent to the inverter Isolator is mounted on output of the inverter where Brand required Lockable AC circuit breaker mounted within the Inverter is installed as per manufacturer s switchboard to act as the inverter main switch for the specification PV inverter system Rating Inverter ceases supplying power within two seconds of a Inverter does not resume supplying power until mains loss of AC mains have been present for more than 60 seconds CONTINUITY CHECK Circuit checked record a description of the circuit checked in this column Continuity of all string sub array and array cables Continuity of all earth connections including module frame SYSTEM CHECK WARNING e IFASTRING IS REVERSED AND CONNECTED TO OTHERS FIRE MAY RESULT e IF POLARITY IS REVERSED AT THE INVERTER DAMAGE MAY OCCUR TO THE INVERTER BEEN UO Polarity Voltage Short Circuit Operating Current ih String 2 00 String 3 00 String 4 00 Sub arrays where required PV array at PV array switch disconnector 00 Irradian
9. for 1 Voltage Rise Inverter Configuration Three Phase Three Phase Phase Inverter Rating kW Conductor Current A Cable Conductor Size mm2 Conductor Maximum Maximum Maximum Material Route length Route length Route length m m m 6 14 ae 4 8 4 3 8 4 4 8 4 5 The inverter shall be connected by fixed wiring to a dedicated circuit on a switchboard AC cables between the inverter and any switchboard and all the cables between any distribution boards and a main switchboard which carry current from the inverter shall be rated for at least the full output current of the inverter energy system All cabling shall be sized in accordance with AS NZS 3000 and AS NZS 3008 8 5 Solar supply main switch in switchboard 8 5 1 8 5 2 8 5 3 8 5 4 8 5 5 8 5 6 The inverter should be connected directly to the main switchboard Where this is not possible or not desirable the inverter energy system should be connected to the distribution board located physically nearest to the inverter and the main switchboard All intermediate distribution boards shall be appropriately labelled see section 12 for examples of signs Labelled Solar Supply Main Switch The main switch for the switchboard to which the inverter is connected shall be a lockable switch An RCD is not to be placed between the consumer s mains and the inverter Note Some sub mains may be connected to the main switchboard via
10. for micro inverter and modules systems 8 2 1 Where the inverter in LV systems is not in sight of the array or more than 3m from the array PV array switch disconnector s shall also be installed adjacent to the inverter Note Generally the PV array DC isolator at the inverter will always be required for roof top mounted systems 8 2 2 All PV array switch disconnectors shall be readily available see section 7 10 10 for details on readily available 8 2 3 For inverters with an integrated switch disconnector a separate switch disconnector is not required at the inverter if the switch disconnector is mechanically interlocked with a replaceable module of the inverter and allows the module to be removed from the section containing the switch disconnector without risk of electrical hazards 8 2 4 Where multiple disconnection devices are required to isolate power conversion equipment they shall be grouped so that they all operate simultaneously or they shall all be grouped in a common location and have warning signs indicating the need to isolate multiple supplies to isolate the equipment see section 12 for examples of signs 8 2 4 1 Where there are more than one isolator they shall be individually labelled e g PV Array DC isolator inverter 1 MPPT A 8 2 4 2 shutdown procedure shall align with the labelling of multiple isolators see the example below SHUTDOWN PROCEDURE FOR SYSTEM A 1 TURN OFF THE SOLAR SUPPLY MAIN SWIT
11. for the state where the system is installed 10 1 3 Where multiple systems are installed at one premises labelling shall accurately reflect which devices control which cs lb SOLAR SYSTEMA ON THE ROOF VOC 760V ISC 35 16A SOLAR SYSTEM B ON THE ROOF 10 1 4 See section 12 for examples of signs 11 COMMISSIONING 11 1 1 The commissioning sheets provided with these guidelines or similar document shall be completed by the accredited installer or the accredited supervisor with suitably licensed person 11 1 2 A fully completed copy shall be provided to the customer in the system documentation and a copy shall be retained by the accredited person Note It is vitally important that a system is tested as per the commissioning requirements of this document to ensure it is safe at the time of final sign off Additionally it enables the installer to prove the system was correctly installed at the time of installation should any questions arise post installation GRID CONNECTED SOLAR PV SYSTEMS 25 rp CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS E ACCREDITED ISSUE 10 2 SEPTEMBER 2015 INSTALLER 12 INSTALLATION AND COMMISSIONING 12 1 General WARNING Where short circuit current measurements are required follow AS NZS 5033 Appendix D for the steps that shall be undertaken to measure the short circuit current safely NOTE Some projects require that short circuit currents are
12. g a person drilling a hole into a wall cavity will hit the conduit first before making contact with the cables Where cables are installed inside buildings but clearly visible e g surface mounted conduit on the inside a of garage wall medium duty MD conduit is acceptable as an alternative Note For non domestic installations see AS NZS 5033 clause 4 3 6 3 2 for requirements TUN GRID CONNECTED SOLAR PV SYSTEMS 16 ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ACCREDITED ISSUE 10 2 SEPTEMBER 2015 7 11 2 Conduits shall be installed so that they are adequately supported These are examples of conduit that is not adequately supported 7 11 3 AS NZS5033 2014 does not allow for any medium duty MD conduit to be installed in the ceiling space Ensure that the transition from MD to HD occurs at the point of penetration of the roof Alternatively UV rated HD corrugated conduit could be used where the cable enters the ceiling space 7 11 4 Double insulation of each conductor shall be maintained within wiring enclosures e g conduit 7 11 5 The wiring enclosure shall be labelled SOLAR at not more than 2m intervals 7 11 6 Where the PV array cable and conduit passes through a tile or steel roof an appropriate collar flashing shall be installed e g dectite a LI LI Note Grinding a tile and passing the conduit between tiles is not an acceptable method as it is in breach of AS NZ
13. inverter shall be mechanically secured in such a manner that they cannot be inadvertently unplugged from the inverter This can be achieved by 8 1 3 1 installing the inverter in an external enclosure with cables suitably supported 8 1 3 2 the use of an inverter which has the cable connection area of inverter covered by a removable enclosure cover which protects the supported cables so that there are no exposed unsupported cable loops 8 1 3 3 the use of conduit and secure wall fixings Note Where the inverter requires DC connectors to be used a maximum allowable distance of no more than 300mm of unprotected DC cable shall be permitted between connectors and conduit provided the location is not subject to mechanical damage 8 1 3 4 Where the inverter is exposed to the weather there shall be no open ends of conduit If a cable is required to exit from a conduit an appropriate cable gland shall be installed on the end of the conduit to ensure the IP rating is maintained see section 7 10 24 The installer shall ensure that the inverter is configured for Australia and that the AS4777 parameters are loaded The installer shall ensure that the grid parameters of the inverter are set to the local distributor s requirements mM GRID CONNECTED SOLAR PV SYSTEMS 19 d cLeANeNercycounc INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS zd ACCREDITED ISSUE 10 2 SEPTEMBER 2015 8 2 PV array DC isolator near inverter Not applicable
14. or facing down the roof ing dow NS Sus OM NOTE Ensure that the switch does not shade the array 7 10 21 All entry points conduit and cable glands to the isolator should be on the lower end of the enclosure either underneath or facing down the roof 7 10 22 Where entry to an isolator is a conduit gland the gland shall be rated IP 55 recommend IP m GRID CONNECTED SOLAR PV SYSTEMS 4 INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ud ACCREDITED ISSUE 10 2 SEPTEMBER 2015 m INSTALLER Note If the conduit gland requires the conduit to be glued to maintain the IP rating the conduit shall be glued e IP 68 Protection Degree Thread Lock EPDM Seals Black UV Stabilized Design QN lt 40 C 100 C Operating Range Image Cobalt Solar 7 10 23 Where the entry to an isolator is a cable gland the gland shall 7 10 23 1 Be rated at least IP 55 CEC recommend IP 66 7 10 23 2 Where multiple cables go through one gland a multi hole cable gland shall be used 7 10 24 There shall be open ends of conduit If a cable is required to exit from conduit a cable gland as specified above shall be installed on the end of the conduit to ensure the IP rating is maintained Aa d A 2 s W 7 10 25 A secondary shield is required to shelter the DC isolator from direct exposure to rain and sun 7 10 25 1 Where
15. particular refer to the clause in AS NZS 3000 that refers to fauna which states Where the presence of fauna is expected to constitute a hazard either the wiring system shall be selected accordingly or special protective measures shall be adopted All conduits exposed to direct sunlight shall be suitably UV rated 7 9 String protection Faults due to short circuits in modules junction boxes combiner boxes module wiring or earth faults in array wiring can result in overcurrent within a PV array 7 9 1 7 9 2 7 9 3 7 9 4 7 9 5 Overcurrent protection shall be provided where it is required by manufacturers of PV modules The key criteria for this the module s Maximum Series Fuse Rating sometimes listed as Maximum Reverse Current AS NZS 5033 Clause 3 3 4 defines the formula to calculate if string protection is required Refer to Attachment 3 for more details of this method AS NZS 5033 Clause 3 3 5 1 defines the rating of the fuse protection In LV arrays overcurrent protective devices where required shall be placed in all current carrying conductors not directly connected to earth In ELV arrays overcurrent protective devices where required for string and sub array cables shall be placed in either the positive or negative conductor the number of current carrying conductors minus one xin GRID CONNECTED SOLAR PV SYSTEMS 12 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS zd AC
16. the panels are installed parallel to the roof a shroud shall be installed over the isolator 7 10 25 2 Where the panels are on a tilt frame the isolator shall be installed in a location where it is sheltered by the panels Note Installation of a PV DC Isolator under a solar module of a tilt array may be considered as a secondary shield However this method must also comply with relevant local requirements such as regulatory bodies etc m GRID CONNECTED SOLAR PV SYSTEMS 15 dM CLEANENeRGy Counci INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS 3 ACCREDITED ISSUE 10 2 SEPTEMBER 2015 dmt INSTALLER errr irs se Soot settee oe TN iliill y 7 10 26 If a junction box is used at the array it is recommended that junction boxes are mounted so that the access to the junction box is made on the side of the junction box and not on a side facing up Additionally the junction box should be installed in a location that is not exposed to the weather 7 11 PV array cable between array and inverter 7 11 1 PV array cables within a domestic building that are installed in ceiling spaces wall cavities under floors shall be enclosed in metal or heavy duty HD insulating conduit When installed in a building other than those listed previously the PV array cable shall be in medium duty conduit as a minimum Note the intention of this is to provide additional protection for cables in locations where they may not be visible e
17. 015 prr 7 2 7 Where monocrystalline or polycrystalline modules are used at least 50mm clearance should be allowed below the array for cooling by natural ventilation Insufficient ventilation will result in high operating temperatures for the modules 7 2 8 The installer shall follow the array frame supplier manufacturer s recommendations when mounting the array to the roof support structure to ensure that the array structure still meets AS1170 2 certification 7 2 9 Where timber is used it shall be suitable for long term external use and fixed so that trapped moisture cannot cause corrosion of the roof and or rotting of the timber The expected replacement time should be stated in the system documentation NOTE Attachment 2 provides some guidance for securing PV arrays on roof structures 7 3 Free standing PV arrays 7 3 1 The array mounting frame shall be wind rated in accordance with AS 1170 2 part 2 Wind Loads 7 3 2 Installation of footings posts and or in ground fasteners shall follow the manufacturer s instructions and installation manual 7 4 Building integrated BIPV installations 7 4 1 The installation of modules that are being used as building material e g tiles building walls sun screens should only be installed by a person qualified to install that particular type of building element 7 5 Verification of AS1170 2 5 1 Installers shall obtain from their frame supplier a copy of the engineering certific
18. CH A AT SWITCHBOARD 2 TURN OFF THE PV ARRAY DC ISOLATORS A LOCATED NEXT TO THE INPUT TERMINALS 2C SOLRORA fn SOLAR SYSTEM A OF THE INVERTER DAIMA AA MAT ANCA nir tie Asin iie GRID CONNECTED SOLAR PV SYSTEMS 20 zi S CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ACCREDITED ISSUE 10 2 SEPTEMBER 2015 8 2 5 Where strings are paralleled at the inverter the CEC recommend that this should occur on the inverter side of the disconnection devices or in the inverter itself Note This will enable the cable to either string to be safely de energised without the need to turn off both rooftop isolators 8 2 6 Where the inverter and isolator are exposed to the weather the isolator shall have an IP rating of at least IP 55 Note the CEC recommend using isolators rated to IP66 8 2 7 Where an isolator is exposed to the weather the CEC recommend that there be no top entries into the isolator and drip loops are utilised at the bottom of the isolator to minimise water ingress Conduit entry at bottom of isolator drip loop 8 2 8 PV array isolators shall meet the requirements of 7 10 6 to 7 10 23 8 3 AC isolator near inverter The purpose of the AC isolator is to de energise the inverter for maintenance or fault rectification siti GRID CONNECTED SOLAR PV SYSTEMS 21 d cLeANeNercycounci INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ud ACCREDITED ISSUE 10
19. CLEAN ENERGY COUNCIL ISSUE 10 1 SEPTEMBER 2015 TABLE OF CONTENTS 1 GENERAL 4 2 DEFINITIONS 4 3 STANDARDS FOR INSTALLATION 4 4 LICENSING 4 1 Extra Low Voltage ELV 5 4 2 Low Voltage LV 5 5 DOCUMENTATION 6 6 RESPONSIBILITIES OF ACCREDITED PERSON 6 6 1 An accredited person shall sign off on systems where they have 6 6 2 Limits apply to the number of installations an accredited person shall sign off per day 7 6 3 Multiple systems at one location 7 6 4 Grid Connect Battery Backup System 7 7 PV ARRAY INSTALLATION 8 7 1 General 8 7 2 Roof mounting not building integrated 8 7 3 Free standing PV arrays 9 7 4 Building integrated BIPV installations 9 7 5 Verification of AS1170 2 9 7 6 Attaching modules to array mounting structure 10 7 Earthing of array frames for a PV array with maximum voltage greater than ELV including AC modules and micro inverter systems 11 7 8 Wiring at the PV array 12 7 9 String protection 12 7 10 PV array DC isolator at array Not applicable for micro inverter and AC modules systems 13 7 11 PV array cable between array and inverter 16 8 INVERTER INSTALLATION 19 8 2 PV array DC isolator near inverter Not applicable for micro inverter AC and modules systems 20 8 3 AC isolator near inverter 21 8 4 AC cable selection 22 8 5 Solar supply main switch in switchboard 23 8 6 Shutdown procedure 23 8 7 Additional Requirements for Micro Inverters 24 8 8 Inverter Earth Fault Indication 24 m GRID CONNECTED
20. CREDITED ISSUE 10 2 SEPTEMBER 2015 prr 7 10 PV array DC isolator at array Not applicable for micro inverter and AC modules systems The positive and negative terminal of a solar array or sub array represents a hazard with potentially high risk when the output voltage is 120V DC or above See Attachment 1 for more details Note the following requirements for the PV array isolator at array 7 10 1 AS NZS 5033 2014 Clause 4 4 1 5 makes it mandatory for an isolator to be installed within 3 meters of the array and visible from both locations for LV systems This is to enable safe disconnection of the array and isolation of the PV array cable 7 10 1 1 lsolators shall not be installed mid string E g Where one electrical string is split over different roof faces all faces are at the same orientation one isolator is required at the point where the PV panel wiring transitions from the PV array to the fixed wiring to the inverter at the array No switch disconnectors required mid string 7 10 2 Isolators shall not be fixed on any portion of the panel 7 10 3 Isolators shall be fixed to the supports by the use of stainless steel screws or by screws of galvanically similar material to minimise corrosion 7 10 4 Isolators shall have an IP rating of at least IP 55 Note the CEC recommend using isolators rated to IP66 7 10 5 Isolators shall be UV resistant 7 10 6 The recommended method of fixing isolators is by using fixing
21. RMAL is permanently fixed at the main switch SUPPLY MAIN SWITCH is permanently fixed at the solar main switch If the solar system is connected to a distribution board then the WARNING following sign is located on main switchboard and all intermediate DUAL SUPPLY distribution boards white on red ISOLATE SOLAR SUPPLY AT DISTRIBUTION BOARD DB01 Installed on all roof top AC isolators ISOLATOR ARRAY D C ISOLATOR This sign is required to notify other people that inverters are installed INVERTER LOCATION on site and where they are located e g on roof SIGNAGE AS NZS 5033 pup M AENEID NEUEM Fire emergency information is permanently fixed on the main UU DI ATE INVERTER SURFIY switchboard and or meter box if not installed together This will isolate the PV array and de energise the PV system b PV installation using a c modules and or small microinverters Shutdown procedure is permanently fixed Any other signage as required by the local electricity distributor at inverter and or on main switchboard EEEE GRID CONNECTED SOLAR PV SYSTEMS 31 3 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS us ACCREDITED ISSUE 10 2 SEPTEMBER 2015 ty Dern ans 5 13 ATTACHMENT 1 DANGEROUS SITUATION A dangerous situation can occur if the person installing the system comes int
22. S 3000 clause 3 9 4 3 1 Conduit passing through a hole in a steel roof and then sealed with silicon is in breach of Standards Australia Handbook 39 1997 clause 8 6 adu GRID CONNECTED SOLAR PV SYSTEMS 17 C CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ACCREDITED ISSUE 10 2 SEPTEMBER 2015 Examples of non acceptable methods GRID CONNECTED SOLAR PV SYSTEMS 18 4j counciL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS 4 ISSUE 10 2 SEPTEMBER 2015 e g ate se ah Pr geo fan 8 INVERTER INSTALLATION 8 1 1 8 1 2 8 1 3 8 1 4 The inverter shall be installed in accordance with the manufacturer s instructions The installer shall do the following 8 1 1 1 ensure the location is appropriate for the IP Rating of the inverter Where this is not possible then the inverter s should be in an appropriate weatherproof enclosure 8 1 1 2 comply with specific environmental requirements e g not exposed to direct sunlight direct rain etc 8 1 1 3 ensure mounting structure is able to support inverter weight 8 1 1 4 ensure mounting structure material is appropriate for the inverter 8 1 1 5 recommended clearances around the inverter shall be followed The inverter heat sink shall be clear of any obstacles to facilitate cooling of the inverter Cables connected to the
23. ards 6 3 3 Once the assessment is complete the CEC will respond to the installer with a letter detailing the assessment finding and exemption from clause 6 2 1 if granted This letter shall be the only acceptable evidence of an exemption from clause 6 2 1 for the purposes of STC creation Note An administration fee may apply for all exemption request assessments in the future 6 4 Grid Connect Battery Backup System 6 4 1 When installing a grid connect battery backup system the installation shall be performed by a person with CEC grid connected install accreditation with battery backup endorsement or a person s with CEC grid connected install accreditation and CEC stand alone install accreditation Note The installation of battery storage has additional safety risks associated with their installation These include e Electric shock hazard e Energy hazard e Chemical hazard mm GRID CONNECTED SOLAR PV SYSTEMS 7 d cLeANeNercycounc INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS zd ACCREDITED ISSUE 10 2 SEPTEMBER 2015 7 PV ARRAY INSTALLATION 7 4 General 7 1 1 PV arrays for installation on domestic dwellings shall not have PV array maximum voltages greater than 600 V The following types of buildings are considered domestic dwellings using the building classifications in the National Construction Code e Class 1 e g a free standing house terrace house town house villa unit e Class 2 e g an apartment
24. ate stating that the array frame is certified to AS1170 2 for their location 7 5 2 Installers shall obtain information on how the frame is to be mounted on the roof to maintain this certification 7 5 3 array frame shall be installed to the manufacturer s instructions to ensure that the array structure meets AS1170 2 certification The installer shall consider the following 7 5 3 1 spacing between fixings for specific wind load regions 7 5 3 2 area of roof that is applicable for panels to be installed some manufacturers only allow the frames to be installed in a specific internal zone of the roof 7 5 3 3 type length and gauge of screws to be used 7 5 3 4 number of screws required per fixing 7 5 3 5 size of batten purlin required for fixing 5 4 The installation checklist includes a clause stating that the system has been installed in accordance with the recommendations of the supplier manufacturer Copies of both these documents shall be included in the manual provided to the customer idu GRID CONNECTED SOLAR PV SYSTEMS 9 i0 S CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ACCREDITED ISSUE 10 2 SEPTEMBER 2015 NOTE If installers are manufacturing their own frames then they shall provide the certificates and include in the manual 7 6 Attaching modules to array mounting structure 7 6 1 Solar modules should be attached to the array structure either using the mounting holes provided by
25. cator light or another form of fault communication e g fax email SMS The fault indication shall be installed in a way that it will make the system owner aware of the fault and initiate an action to correct an earth fault 8 8 3 Micro inverter and a c module systems operate at with a PV array maximum voltage in the ELV range and therefore are not required to have the earth fault indication although the CEC recommends that if the system has the capability it should be installed 8 8 4 Where the system utilises remote monitoring to inform the customer of an earth fault the configuration of the remote monitoring shall be provided in the customer manual see section 5 mU GRID CONNECTED SOLAR PV SYSTEMS 24 2 INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ud ACCREDITED ISSUE 10 2 SEPTEMBER 2015 mts INSTALLER 9 METERING 9 1 1 The installer shall notify the customer of the metering processes 9 1 2 The system shall not be energized until correct metering is installed other than for testing or commissioning purposes as defined in section 12 Note AS NZS3000 clause 7 3 3 states that the system may not be energised until a formal agreement has been made with the electricity distributor 10 SIGNAGE 10 1 1 All signage on switches isolators and within distribution boards and switchboards shall be in accordance with AS 4777 and AS NZS 5033 and or 10 1 2 The relevant electrical service and installation rules
26. ce at time of recording the current 12 Wim2 INSULATION RESISTANCE MEASUREMENTS see table 12 3 1 for minimum values of insulation resistance Array positive to earth Array negative to earth MO INSTALLER INFORMATION CEC Accredited installer s name il CEC Accreditation number verify that the above system has been installed to all relevant standards Signed Date CEC Accredited Designer s name Licensed electrician s name where applicable e g LV work Electrician s licence number SIGNAGE AS 4777 aiin GRID CONNECTED SOLAR PV SYSTEMS 27 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS P ACCREDITED ISSUE 10 2 SEPTEMBER 2015 5 276 INSTALLER fama un WARNING DUAL SUPPLY ISOLATE BOTH NORMAL AND SOLAR SUPPLIES BEFORE WORKING ON THIS SWITCHBOARD NORMAL SUPPLY MAIN SWITCH SOLAR SUPPLY MAIN SWITCH WARNING DUAL SUPPLY ISOLATE SOLAR SUPPLY AT DISTRIBUTION BOARD DB01 INVERTER LOCATION SIGNAGE AS NZS 5033 SOLAR ARRAY ON ROOF Open Circuit Voltage Short Circuit Current A PV ARRAY D C ISOLATOR Shutdown procedure is permanently fixed at inverter and or on main switchboard SHUTDOWN PROCEDURE INSERT APPROPRIATE STEPS FOR SAFE SHUTDOWN Table 12 3 1 Minimum insulation resistance TIPP 4 ee 4 1 CLEAN ENERGY COUNCIL zd ACCREDITED
27. ch the inverter is connected An example shutdown procedure would be e Turn off the main switch solar supply at the AC switchboard This will isolate the PV array 8 6 4 DC Conditioning Units The shutdown procedure must reflect the specific requirements of the individual system Note As this is different for the various technologies an example cannot be given 87 Additional Requirements for Micro Inverters The following is in addition to the above requirements for all inverters 8 7 1 Each input of the micro inverter is limited to 350W PV power at STC and at ELV 8 7 2 DC cable length is less than 1 5m including any adaptor cables 8 7 3 The method of cable support for the interconnecting AC cable and DC panel cables shall have a life as long as the system 8 7 4 Cable support shall ensure that there is no stress placed on connectors 8 7 5 Plugs sockets and connectors shall only be mated with those of the same type from the same manufacturer 8 7 6 A PV array disconnection device is not required for PV modules connected to micro inverters AS NZS 5033 2014 clause 4 4 1 2 Note See section 7 for array earthing requirements for micro inverter systems 8 8 Inverter Earth Fault Indication As of 11 July 2015 AS NZS 5033 requires the installation of an earth fault alarm indication 8 8 1 Where the PV array maximum voltage is greater than ELV an earth fault system shall be installed 8 8 2 The alarm system may be an audible signal indi
28. e PV array is within 1 21 as metre of roof edges wind loading can be 3 doubled Additional fixing may be required 30 based on the wind region Wind regions C and D below are cyclonic areas and have special roof and PV module attachment requirements Consult the PV module structural and Region A k mounting specifications for high wind areas Region B Region C VJ Image Sunlock Region D FM GRID CONNECTED SOLAR PV SYSTEMS 32 1 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ACCREDITED ISSUE 10 2 SEPTEMBER 2015 5
29. ent temperature Example of temperature de rating curve Image 7 10 13 Isolators shall not be polarity sensitive 7 10 14 Isolators shall interrupt all live conductors simultaneously 7 10 15 Isolators shall not have exposed live parts in connected or disconnected state 7 10 16 Shall comply with the requirements of IEC 60947 series and shall have a utilization category of at least DC21B refer IEC 60947 3 7 10 17 Isolator voltage ratings shall be as per AS NZS5033 2014 Appendix B 7 10 17 1 for non functionally earthed systems isolated inverter transformer based voltage rating of both poles together of the switch disconnector shall be at least the PV array maximum voltage Voc Array adjust for lowest ambient temperature of site 7 10 17 2 non isolated inverter transformerless based voltage rating of each pole of the isolator switch disconnector shall be at least the PV array maximum voltage Voc Array adjust for lowest ambient temperature of site 7 10 18 Functionally earthed array presents specific issues The voltage rating of isolators for these systems are detailed in AS NZS 5033 2014 Appendix B 7 10 19 Labelled PV ARRAY D C ISOLATOR 7 10 20 Manufacturer s installation instructions for isolators shall be followed regarding mounting orientation to ensure the IP rating is maintained The roof mounted isolator should be mounted such that the switch is in a sideways position Entry points underneath
30. er is not also signing off as the CEC accredited designer for the installation the accredited designer shall provide the information as indicated below 5 1 1 Alist of equipment supplied Obtained from CEC designer 5 1 2 A list of actions to be taken in the event of an earth fault alarm including any remote monitoring configuration 5 1 3 The shutdown and isolation procedure for emergency and maintenance 5 1 4 A basic connection diagram that includes the electrical ratings of the PV array and the ratings of all overcurrent devices and switches as installed Obtained from CEC designer 5 1 5 System performance estimate Obtained from CEC designer 5 1 6 Recommended maintenance for the system Obtained from CEC designer 5 1 7 Maintenance procedure and timetable Obtained from CEC designer 5 1 8 The commissioning sheet and installation checklist 5 1 9 Array frame engineering certificate for wind and mechanical loading Obtained from CEC designer 5 1 10 Installer designer s declaration of compliance 5 1 11 Warranty information Obtained from CEC designer 5 1 12 Equipment manufacturer s documentation and handbooks for all equipment supplied Obtained from CEC designer 6 RESPONSIBILITIES OF ACCREDITED PERSON 6 3 Anaccredited person shall sign off on systems where they have 6 1 1 Undertaken the installation or 6 1 2 Supervised the installation by others 6 1 3 Supervision includes visiting the site at
31. including but not restricted to methods such as non reactive separators between metal surfaces and under screw and bolt heads and selection of materials with appropriate type and thickness of anti corrosive coating 7 2 2 Refer to the manufacturer s guidelines to ensure that the materials introduced are compatible with the roofing 7 2 3 Any roof penetrations shall be suitably sealed and waterproofed for the expected life of the system Refer to roofing manufacturer s guidelines See section 7 11 6 for more details If this is not possible then this shall be detailed in the system s Maintenance Timetable 7 2 4 Itis important to allow sufficient clearance to facilitate self cleaning of the roof to prevent the build up of leaves and other debris Refer to roofing manufacturers guidelines 7 2 5 If fauna such as birds vermin etc are a problem in the vicinity of the installation then consideration should be given to how to prevent them gaining access under the array 7 2 6 Tiles shall sit flat after the installation of tile mounting brackets to ensure the tiles maintain their original ingress protection There may be a requirement to grind some of the underside of the tile to enable it to sit correctly These are examples of tiles not maintaining their original ingress protection mM GRID CONNECTED SOLAR PV SYSTEMS 8 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS 53 ACCREDITED ISSUE 10 2 SEPTEMBER 2
32. mation an earth strap shall be installed across the join As per AS NZS 3000 the earth cable can be insulated unsheathed cable except when exposed to direct sunlight If exposed to direct sunlight the insulated unsheathed cable shall have a physical barrier to prevent exposure to direct sunlight e g conduit The earth cable shall be installed as per AS NZS 3000 requirements Particular attention shall be paid to mechanical protection and support Earth cable cannot pass through a tile or steel roof without additional mechanical protection conduit and an appropriate collar flashing e g dectite The same conduit that is used for the PV array cable can also be used for the earth cable These are examples of earth cable that is not adequately mechanically protected The earthing conductor from the PV array can connect to inverter s main earth conductor in the A C output cable provided the following conditions are met 7 7 8 1 Installation is not subject to lightning 2 2 8 2 Inverter A C earth is of an appropriate size GRID CONNECTED SOLAR PV SYSTEMS CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ISSUE 10 2 SEPTEMBER 2015 7 7 9 e Isolated inverter transformer based and floating array inverter A C earth size is appropriate e Non Isolated inverter transformerless earth conductor shall be sized according to AS NZS 3000 using the size of the PV array cabling as the active conductor e Functi
33. n 8 3 6 2 The isolator shall be installed adjacent to the inverter or inverter group This isolator may be a single isolator and can be used to isolate multiple adjacent inverters 8 3 6 3 Where micro inverters are not installed adjacent to each other additional isolators shall be installed 8 3 6 4 Isolator enclosures shall be IP55 rated CEC recommend IP66 8 3 6 5 All entry points conduit and cable glands to the isolator should be on the lower end of the enclosure either underneath or facing down the roof 8 4 ACcable selection 8 4 1 cables shall comply with the wiring requirements of AS NZS 3000 8 4 2 Individual states and territories may have their own specific requirements regarding cable selection and voltage rise The installer shall ensure these are complied with 8 4 2 1 Where this is not defined it is recommended that the voltage drop between the inverter and the main switchboard should be kept as small as possible recommended 196 to minimise voltage rise within the installation See table below Note This will limit inverter disconnection in areas where the grid voltage may be high to decrease incidents of overvoltage trips for inverters This is also an issue for micro inverter installations where the AC cable run may be long iie GRID CONNECTED SOLAR PV SYSTEMS 22 dir CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ACCREDITED ISSUE 10 2 SEPTEMBER 2015 Maximum Cable Lengths
34. ng Protection AS NZS 3008 Electrical installations Selection of cables e GRID CONNECTED SOLAR PV SYSTEMS 4 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS 0 ACCREDITED ISSUE 10 2 SEPTEMBER 2015 3 1 1 3 1 2 The grid interactive inverter shall be tested in accordance with AS 4777 parts 2 and 3 and with IEC 62109 parts 1 and 2 The grid interactive inverter shall be listed on the Clean Energy Council s approved inverter list or approved by the Distribution Network Service Providers DNSP The system shall comply with the relevant electrical service and installation rules for the state where the system is installed NOTE the local electricity distributor may have additional requirements These guidelines set additional requirements to the standards An accredited installer or supervisor is expected to follow these guidelines in addition to the requirements within the relevant standards These guidelines will become mandatory on 1 September 2015 4 LICENSING 41 Extra Low Voltage ELV 4 1 1 All extra low voltage wiring should be performed by a competent person which is defined by the Australian Standard AS NZS 4509 1 stand alone power systems as a person who has acquired through training qualifications experience or a combination of these Knowledge and skill enabling that person to correctly perform the task required 4 2 Low Voltage LV 4 2 1 4 2 2 4
35. o contact with the positive and negative outputs of the solar array or sub array when the output voltage is 120V DC or above Most grid connected systems use approved solar modules which are connected using double insulated leads with polarised shrouded plug and socket connections A dangerous situation is only likely to occur at the PV array isolator before the inverter the roof top isolator the sub array and array junction boxes if used DISCONNECT To prevent the possibility of an installer coming in contact with live wires it is recommended practice that one of the interconnect cables in each string as shown above is left disconnected until all the wiring is completed between the array and the inverter Only after all isolators and other hard wired connections are completed should the interconnection in the middle of the array be connected 14 ATTACHMENT 2 PV ARRAY ROOF MOUNTING Refer to AS NZS 1170 2 Structural design actions Wind actions and Australian Wind Regions map below PV array frames shall be wind rated for the site Consult the manufacturer s specifications some modules are not suitable for use in cyclone zones 50km 100km Care shall be taken with roof fixing systems 9 Consideration shall be given to factors such as e wind direction e terrain category suburban city industrial e location topography e height of structure 25 EM As an example where th
36. onally earthed arrays see AS NZS 5033 clause 4 4 2 2 for requirement Note See AS NZS 5033 clause 4 4 2 2 for more detailed information regarding this requirement AC modules Micro Inverters additional requirements not subject to lightning 7 7 9 1 The earthing of the PV module and mounting frame can be achieved using the micro inverter earth connection see AS NZS 5033 clause 4 4 2 2 7 8 Wiring at the PV array 8 1 7 8 2 7 8 3 7 8 4 7 8 5 7 8 6 7 8 7 7 8 8 7 8 9 7 8 10 7 8 11 7 8 12 The electrical installation of the array shall be in accordance with AS NZS 5033 All LV wiring shall be undertaken by a licensed electrician Plastic cable ties are not to be used as the primary means of support The PV array wiring shall comply with the wiring requirements of AS NZS 3000 Cables shall be protected from mechanical damage The installer shall ensure that all connectors used are waterproof and connected securely to avoid the possibility of a loose connection Only connectors which are the same type model from the same manufacturer are allowed to be married at a connection point Cables shall not lay on roofs or floors without an enclosure or conduit Cable size to be determined by AS NZS 5033 Clause 4 3 6 1 For LV PV arrays the CEC recommend that under maximum load conditions the voltage drop from the most remote module in the array to the input of the inverter should not exceed 3 of the Vmp voltage at STC In
37. ovide a network of competent solar photovoltaic power systems designers and installers e increase the uptake of solar photovoltaic power systems by giving customers increased confidence in the design and installation work The performance of a reliable installation that fulfils customer expectations requires both careful design and correct installation practice Compliance with relevant state health and safety regulations is also necessary NOTE These guidelines alone do not constitute a fully definitive set of rules and are to be read in conjunction with all relevant Australian standards Where these guidelines have additional requirements above that stated in the Australian standards then these guidelines should be followed 2 DEFINITIONS This document uses the same terminology as outlined in AS NZS 5033 Two important definitions are 2 1 1 Where the word shall is used this indicates that a statement is mandatory 2 1 2 Where the word should is used this indicates that a statement is a recommendation 3 STANDARDS FOR INSTALLATION Accredited installers shall comply with the following standards where applicable AS NZS 3000 Wiring Rules AS NZS 5033 nstallation and safety requirements for photovoltaic PV arrays AS NZS 4509 2 Stand alone Power Systems Design AS NZS 1170 2 Structural design actions Wind Actions AS 4777 1 Grid connection of energy systems via inverters Installation requirements AS NZS 1768 Lightni
38. points that are on the outside of the enclosure to minimise penetrations and water ingress in to the isolator 7 10 7 When internal screws are used the designated screw locations shall be used A dangerous situation may occur if a wire becomes loose and makes contact with the fixing screw This could put the full array voltage on to the mounting structure see below 7 10 8 All screw cover caps that are supplied with the isolator or junction box shall be installed 7 10 9 All internal mounting holes should be silicone filled External fixing points should be used to minimise the chance of water ingress If the cable becomes disconnected it could liven up the mounting structure GRID CONNECTED SOLAR PV SYSTEMS 13 iE CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ACCREDITED ISSUE 10 2 SEPTEMBER 2015 7 10 10 Isolators shall be readily available this is defined as Capable of being reached for inspection maintenance or repairs without necessitating the dismantling of structural parts cupboards benches or the like 7 10 11 Isolators shall be rated for DC use 7 10 12 Isolators shall be rated to interrupt full load and prospective fault currents rated operational current suitable for a temperature of 40 C ambient plus an additional 40 C e g 80 C see below for example Derating curve 1 tT 35 40 45 50 55 60 65 70 75 80 85 Ambi
39. rame is installed to manufacturer s instructions location Wiring is protected from mechanical damage and is No galvanically dissimilar metals are in contact with appropriately supported the array frames or supports Roof penetrations are suitably sealed and weatherproofed LV DC and AC INSTALLATION All low voltage wiring has been installed by a licensed All wiring has been tested and approved by qualified electrical tradesperson electrical tradesperson adit GRID CONNECTED SOLAR PV SYSTEMS 29 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS zd ACCREDITED ISSUE 10 2 SEPTEMBER 2015 dmt INSTALLER INVERTER AC isolator mounted adjacent to each group of micro Inverter communications device has been installed inverters inverter where required Lockable AC circuit breaker mounted within the Inverter is installed as per manufacturer s specification switchboard to act as the inverter main switch for the PV inverter system Rating Inverter ceases supplying power within two seconds of Inverter does not resume supplying power until mains loss of AC mains have been present for more than 60 seconds CONTINUITY CHECK Circuit checked record a description of the circuit checked in this column SYSTEM CHECK may need to be verified through the sys
40. recorded as part of the contractual commissioning otherwise a record of the actual operating current of each string is sufficient This could be done by using the meter on the inverter or by using a clamp meter when the system is operational 12 2 Insulation resistance measurement WARNING PV array dc circuits are live during daylight and unlike a conventional ac circuit cannot be isolated before performing this test Follow AS NZS 5033 Appendix D4 for the steps that shall be undertaken to measure the insulation resistance safely 12 3 String Inverter Installation and commissioning sample INSTALLATION DETAILS LLL am and model number oc series in a string in PV array model number Numberofinveters Number of MPPTs PV ARRAY PV array tilt PV array orientation installation location instructions No galvanically dissimilar metals are in contact Roof penetrations are suitably sealed and PV wiring losses are less than 3 the Where PV array comprises multiple strings string maximum current output of the array protection has been provided Wiring is protected from mechanical damage Weatherproof PV array isolator mounted adjacent to and is appropriately supported the array Brand LV DC and AC INSTALLATION All low voltage wiring has been installed by a All wiring has been tested and approved
41. repairs per day Note The reasoning behind these requirements is to ensure integrity is maintained in the solar industry and that all systems are installed in a safe manner and meet all the guidelines and standards Data from previous audit regimes identified that there was a direct correlation between systems deemed to require rectification sub standard installation and the number of systems signed off in one day 6 3 Multiple systems at one location If a project involves multiple systems at one location where the systems are installed in stages the accredited person installing or supervising these installations may request a formal exemption from clause 6 2 to sign off up to 10 systems per day Example multiple systems installed on an apartment block or at a retirement village where the cables roughed in on one date the inverter mounting frame and panels installed on another date and the final connection and commissioning on an another date 6 3 1 An installer shall contact the CEC and request an exemption from clause 6 2 prior to the installation starting Exemptions to clause 6 2 WILL NOT be granted after a project has been completed 6 3 2 The installer must provide details of the project and the installation schedule for assessment by the CEC Exemptions may be granted by the CEC to installers who can demonstrate that the schedule of installation will ensure all systems are installed in a safe manner and meet all guidelines and stand
42. tem communications portal WARNING e IF POLARITY IS REVERSED AT THE INVERTER DAMAGE MAY OCCUR TO THE INVERTER Polarity Operating Operating Polarity Operatin Operating Current Voltage Current 0 Voltage Panli O Pandi A Panel2 _ A O JPameli2 V A Panl38 V _ A Panel V A Pael4 VA Panel5 V _ A A Panle A Panel7 msT VA Panl8 A Pare 18 V A PPanel9 gPaelig V A 10 _ A pe jJPael20 A Irradiance at time of recording the current TT INSTALLER INFORMATION CEC Accredited installer s name CEC Accreditation number verify that the above system has been installed to all relevant standards Signed Date CEC Accredited Designer s name Licensed electrician s name Electrician s licence number Signed Date asin GRID CONNECTED SOLAR PV SYSTEMS 30 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS zd ACCREDITED ISSUE 10 2 SEPTEMBER 2015 SIGNAGE AS 4777 WARNING On switchboard to which inverter is directly connected white on red DUAL SUPPLY ISOLATE BOTH NORMAL AND SOLAR SUPPLIES BEFORE WORKING ON THIS SWITCHBOARD NO
43. the manufacturer or via clamps 7 6 2 Where modules are installed in such way that the junction box is to the side or at the bottom care must be taken to ensure this is permitted by the manufacturer 7 6 3 When using clamps solar panel manufacturer s installation instructions shall be followed The installer shall consider the following 7 6 3 1 amount of overhang allowed from clamp to end of module 7 6 3 2 size of clamp required Uplift load gt 2400 4 To ensure the clamps overlap the module frame Downforce load 2300 by at least 0 2 in 5 mm tn the long sias range 5 To ensure the clamps overlap length is at least 1 57 in 40 mm EA Clamping en z Min 3 mm thickness long side E frame Clamping an Min overlap length short side Far CS5P and CS6P series an additional suppor f bar should be placed below the module where I 1 i ume download farce above 1600P a4 is expected M n 3 m m Over d 5 m m Mounting rails should rum parallel to the short side Fame Image Canadian Solar NOTE Attaching a solar module in such a manner e g drilling pop riveting that causes a hole in the anodised aluminium frame of the solar module typically voids the manufacturer s product warranty with respect to defects in material and workmanship If the installer intends to undertake an installation in this manner they shall obtain written verification from the manufacturer that it does not affect
44. the warranty This shall be included in the system documentation supplied to the customer FM GRID CONNECTED SOLAR PV SYSTEMS 10 CLEAN ENERGY COUNCIL INSTALL AND SUPERVISE GUIDELINES FOR ACCREDITED INSTALLERS ACCREDITED ISSUE 10 2 SEPTEMBER 2015 7 7 1 7 1 2 7 7 3 7 7 4 7 7 9 7 1 6 7 1 1 7 7 8 All exposed metal PV module frames and the array mounting frames shall be earthed where the PV array has a PV array maximum voltage Voc adjusted for lowest temperature of greater than ELV or a c modules or micro inverters with LV outputs are installed Minimum earth cable size of 4mm shall be used and may be larger See AS NZS 5033 clause 4 4 2 1 for requirements Earth connection shall be 7 7 3 1 by a purpose made fitting providing earthing or bonding connections for dissimilar metals and fitted to the manufacturer s instructions or 7 7 3 2 purpose made washers with serrations or teeth for the connection between the PV module and mounting frame fitted to the manufacturer s instructions and 7 7 3 3 arranged so that the removal of a single module earth connection will not affect the continuity of the earthing or bonding connections to any other module Self tapping screws shall not be used Ensure that rail joiners splice provide earth continuity Some rail manufacturers state that the use of the rail joiner splice provides earth continuity between rails If the manufacturer does not provide this infor
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