How do you go about doing a COC on a solar system with 8KW inverter and a couple batteries? My understanding is that it would be 3 seperate testes done on each of this sections such as the voltages, and Earth Fault Loop Impedance, what else needs to be tested on the solar panel side? Inverter side?, Battery side and Grid side? on p263 it talks about the Prospective short circuit current test on DC, What is meant by "total resistance of the upstream network"? it also says you can use the PSCC that the manufacturer used at the terminals (8.4.6.4) would you write down the manufacturer's rating on 1 battery or add up all the batteries and use that as the PSCC?