OP
moggy1968
I had some concerns when you first posed on this forum because the inverter is quite a poor match to this system being very overspecced. My preference would be a 3.6kW and the most I would go to is a 4kW inverter.
Most larger systems (i.e one around 4kW) require a 100ma RCD. you can often get away with a 30ma but they can sometimes cause tripping. Some manufacturers even specify 300ma RCDs.
As above, if it doesn't need an RCD don't use one. If your installer says every circuit needs and RCD, as I have been told by more than one electrician, then they don't know what they are talking about.
Generally I try and keep PV completely seperated from the household circuits by using a sub board fed from a supply off the mains but if they move it to the unprotected side of the board you should be ok (assuming it doesn't need an RCD for other reasons)
I also have concerns about the cable they have used, it looks like DC cable to me. Totally wrong and their appears to be no earth, which there should be (not array earthing, which is a different matter. There should be an earth running from the inverter back to the board. If they used 3 core cable or twin and earth it would be one of those, but they haven't)
The cabling is quite untidy and should be clipped up, cable should not be allowed to hang on it's terminations.
It does make me rather concerned about what else they may/may not have done.
still, they wired the meter the right way round, thats a common mistake!
Most larger systems (i.e one around 4kW) require a 100ma RCD. you can often get away with a 30ma but they can sometimes cause tripping. Some manufacturers even specify 300ma RCDs.
As above, if it doesn't need an RCD don't use one. If your installer says every circuit needs and RCD, as I have been told by more than one electrician, then they don't know what they are talking about.
Generally I try and keep PV completely seperated from the household circuits by using a sub board fed from a supply off the mains but if they move it to the unprotected side of the board you should be ok (assuming it doesn't need an RCD for other reasons)
I also have concerns about the cable they have used, it looks like DC cable to me. Totally wrong and their appears to be no earth, which there should be (not array earthing, which is a different matter. There should be an earth running from the inverter back to the board. If they used 3 core cable or twin and earth it would be one of those, but they haven't)
The cabling is quite untidy and should be clipped up, cable should not be allowed to hang on it's terminations.
It does make me rather concerned about what else they may/may not have done.
still, they wired the meter the right way round, thats a common mistake!
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