Walter Leach
Junior Member
- Joined
- Jun 8, 2012
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I don't install PV myself but I now have two customers where I have done work and installed split load CU's (2 * 30mA RCDs) as part of the work who have since had Solar PV installed and they are now experiencing increased nuisance tripping since the PV was installed (all anecdotal so far). I have had a quick look at one site and where my x1 RCD ramp trip tests were tripping at 24.0mA with the solar PV connected they now trip at 18/19mA which implies the inverter is creating about 5-6mA earth leakage. If I isolate the PV the trip test reverts back to 24mA. Customer has had their PV installer out to look at it and he said his side is all OK and suggested customer moves some sockets to the other RCD but that would put all sockets on one RCD rather than across two. I plan to get a meter and measure the actual current in the earth to follow this up but is this typical?