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OWLelectrical
I dont profess to know much about solar but said I would check some voltages and ask on here for a friend. He has a Fronius IG20 inverter the panels are 180 ( unsure of make) thats what it says on paperwork. The inverter is saying that its only working at 50 %. He has 14 panels on 1 string. Does this sound right. When I tested the DC isolator there was 406v DC and the AC was 243v AC. Why is the efficiency down? Many thanks.