COC for a solar system

[Alfred M]

If hybrid systems is used in parallel with incoming mains and any switchgear is changed at point of consumption (db board) then a new coc is warranted. Labelling of db board should indicate that alternate supply is present and in case of emergency both mains supply and alternate supply should be isolated. Pv systems are deemed fixed installations and there are no legislation in SA governing the installation we should at least expect pv installers have acquired green card for installations. There are many alternative supplies available if not connected to incoming mains supply (Free standing ups systems) then coc is not required.

[GCE]

Pv systems are deemed fixed installations and there are no legislation in SA governing the installation

PV systems are covered in legislation under SANS 10142-1 extensively in section 7.12 and 7.15 and falls under the definition of Electrical Installation work

we should at least expect pv installers have acquired green card for installations.

A " Green Card " has no Statutory standing and does not qualify one to install solar plants - Only the OHSA ,electrical regulations , and SANS 10142-1 are the only Statutory requirements

There are many alternative supplies available if not connected to incoming mains supply (Free standing ups systems) then coc is not required.

If the UPS is a plug into socket outlet and then a single PC plugs in then I agree - The bigger units that are connected to electrical installations are covered under SANS 10142-1 section 7.12 and a COC would need to be written for the Electrical Installation work that takes place.

7.12 Alternative supplies
NOTE Alternative supplies include but are not limited to low-voltage generating sets,
photovoltaic (PV) installations, gas generators, diesel generators, wind turbines and
hydropower plant.

7.12.1.2 Subclause 7.12 covers, but is not limited to, the following:
a) alternate supply that consist of a combination of an internal combustion
engine or a turbine, hydro plant, wind energy recovery installation or any
similar source of mechanical energy and an alternator or a d.c. generator;
b) rotary UPS (uninterruptible power supply) systems that consist of a
combination of an electric motor and an alternator, with batteries as a
standby power source for the electric motor, or with an internal combustion
engine, gas or turbine as a standby power source for the alternator;
c) static UPS systems that consist of static inverters with batteries as the
standby power source (with or without bypass facilities), and
d) installations similar to those in 7.12.1.2(c), but sourcing energy from
photovoltaics or other sources.

[Alfred M]

https://www.durakoolrelays.com/infor...-why-use-them/

[Alfred M]

Dc supply always more positive than load side. As contactors or interuptors are in series of the positive lead the + always go to the battery or array the load is always more negative than the source

[Derlyn]

Thank you very much for your assistance, brother. Much appreciated.
Have a lekker day.