Hi all new to solar and am looking at purchasing a used system and trying to do some tests to confirm the functionality. System installed 5 years ago, 5080 watt array (280 watt nusunsolar Panels x 18) .with sunnybou 5000 US inverter. System was never hooked up for net metering . Guy bought the house with the setup and has no interest in solar. Stated previous owner used the system Little as he was rarely there(it was a 2nd home).
I have found out that the nusunsolar company went out of business in 2 years and were in Columbus, INdiana not far from me. I set off to test the VOC and ISC of the panels To find out if they were in spec and The voltage for The VOC was 55-57V instead of 44 factory spec. The ISC was 4.2-5.2 instead of Factory 8.1. Full sun, panels isolated etc . Tested 9 panels. One panel inoperable had horrible corrosion under where The diodes were and is junk . Are these readings tolerable ? I
I have found out that the nusunsolar company went out of business in 2 years and were in Columbus, INdiana not far from me. I set off to test the VOC and ISC of the panels To find out if they were in spec and The voltage for The VOC was 55-57V instead of 44 factory spec. The ISC was 4.2-5.2 instead of Factory 8.1. Full sun, panels isolated etc . Tested 9 panels. One panel inoperable had horrible corrosion under where The diodes were and is junk . Are these readings tolerable ? I
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