A: Suntiki Solar Verification Certificate:

DESIGN, CONSTRUCTION, INSPECTION AND TESTING:

I/we being the person(s) responsible for the design, construction, inspection and testing of the electrical installation (as indicated by the signature(s) below), particulars of which are described above, having exercised reasonable skill and care when carrying out the design, construction, inspection and testing, herby certify that the said work for which I/we have been responsible is, to the best of my/our knowledge and belief, in accordance with ………………………………………………..

B: Suntiki Solar Inspection Report:

General

The entire system has been inspected to the requirements of IEC 60364-6 and an inspection report to meet the requirements of IEC 60364-6 is attached.

DC system – General

• The DC  system  has  been  designed,  specified  and  installed  to  the  requirements  of IEC 60364 and IEC TS 62548:2016.
• The maximum PV array voltage is suitable for the array location.
• All system components and mounting structures have been selected and erected to withstand the expected external influences such as wind, snow, temperature and corrosion.
• Roof fixings and cable entries are weatherproof (where applicable).

DC system – Protection against electric shock

• Protective measure provided by extra low voltage (SELV / PELV) – yes / no.
• Protection by use of class II or equivalent insulation adopted on the DC side – yes / no.
• PV string and array cables have been selected and erected so as to minimize the risk of earth faults and short-circuits. Typically achieved by the use of cables with protective and reinforced insulation (often termed “double insulated”) – yes / no.

DC system – Protection against the effects of insulation faults

• Galvanic separation in place inside the inverter or on the AC side – yes / no.
• Functional earthing of any DC conductor – yes / no.
• PV Array Earth Insulation Resistance detection and alarm system  is  installed  – to the requirements of IEC TS 62548:2016.
• PV Array Earth Residual Current Monitoring detection and alarm system is installed – to the requirements of IEC TS 62548:2016.

DC system – Protection against overcurrent

• For systems without string overcurrent protective device:
  • IMOD_MAX_OCPR (the module maximum series fuse rating) is greater than the possible reverse current;
  • string cables are sized  to accommodate the maximum  combined fault current from parallel strings.
• For systems with string overcurrent protective device:
  • string overcurrent   protective   devices   are   fitted   and   correctly   specified   to   the requirements of IEC TS 62548:2016.
• For systems with array / sub-array overcurrent protective devices:
  • overcurrent protective devices are fitted and correctly specified to the requirements of IEC TS 62548:2016.
• For systems where the inverter(s) can produce a DC back-feed into the PV array circuits:
  • any back-feed current is lower than both the module maximum fuse rating and the string cable ampere rating.

DC system – Earthing and bonding arrangements

• Where the PV system includes functional earthing of one of the DC conductors:
  • the functional earth connection has been specified and installed to the requirements of IEC TS 62548:2016.
• Where a PV system has a direct connection to earth on the DC side:
  • A functional earth fault interrupter is provided to the requirements of IEC TS 62548:2016.
• Array frame bonding arrangements have been specified and installed to the requirements of IEC TS 62548:2016.
• Where protective earthing and/or equipotential bonding conductors are installed:
  • they are parallel to, and bundled with, the DC cables.

DC system – Protection against the effects of lightning and overvoltage

• To minimize voltages induced by lightning, the area of all wiring loops has been kept as small as possible.
• Measures are in place to protect long cables (e.g. screening or the use of SPDs).
• Where SPDs are fitted, they have been installed to the requirements of IEC TS 62548:2016.

DC system – Selection and erection of electrical equipment

• The PV modules are rated for the maximum possible DC system voltage.
• All DC components are rated for continuous operation at DC and at the maximum possible DC system voltage and current as defined in IEC TS 62548:2016.
• Wiring systems  have  been  selected  and  erected  to  withstand  the  expected  external influences such as wind, ice formation, temperature, UV and solar radiation.
• Means of isolation and disconnection have been provided for the PV array strings and PV sub-arrays – to the requirements of IEC TS 62548:2016.
• A DC switch disconnector is fitted to the DC side of the inverter to the requirements of IEC TS 62548:2016.
• If blocking diodes are fitted, their reverse voltage rating is at least 2 x Voc (stc) of the PV string in which they are fitted (see IEC TS 62548:2016).
• Plug and  socket connectors  mated  together  are  of  the same type  and  from  the same manufacturer and comply with the requirements of IEC TS 62548:2016.

AC system

• A means of isolating the inverter has been provided on the AC side.
• All isolation and switching devices have been connected such that PV installation is wired to the “load” side and the public supply to the “source” side.
• The inverter operational parameters have been programmed to local regulations.
• Where an RCD is installed to the AC circuit feeding an inverter, the RCD type has been verified to   ensure   it   has    been    selected    according    to    the    requirements    of IEC TS 62548:2016.

Labelling and identification

• All circuits, protective devices, switches and terminals suitably labelled to the requirements of IEC 60364 and IEC TS 62548:2016.
• All DC junction boxes (PV generator and PV array boxes) carry a warning label indicating that active parts inside the boxes are fed from a  PV array and may still be live after isolation from the PV inverter and public supply.
• Means of isolation on the AC side is clearly labelled.
• Dual supply warning labels are fitted at point of interconnection.
• A single line wiring diagram is displayed on site.
• Installer details are displayed on site.
• Shutdown procedures are displayed on site.
• Emergency procedures are displayed on site (where relevant).
• All signs and labels are suitably affixed and durable.

C: Suntiki Solar PV Array Test Report: