โNov-13-2018 09:49 AM
โNov-17-2018 05:01 AM
โNov-14-2018 06:03 PM
โNov-14-2018 05:30 PM
wd wrote:
I have 2 65w panels connected through a controller. I am testing them with the connection wires disconnected. I am getting 20.5 VOC and 3.5 ISC from each panel. The back of each panel says it should have 21.6 VOC and 8.31 ISC. Anyone know how much charging power i am losing? Are the panels worn out? I've had them about 9 years from Solarland. Don't have a lot of knowledge about these so any help would be appreciated.
โNov-14-2018 05:22 PM
โNov-14-2018 07:40 AM
โNov-13-2018 02:12 PM
โNov-13-2018 01:57 PM
โNov-13-2018 01:31 PM
mike-s wrote:
Unless you know for a fact that your solar irradiance is 1000 W/m^2 on a panel at 25C, you can't expect to get the numbers on the label. That ISC sounds about 2x too high for a 12 V (nominal), 65 W panel. What does it show as Vmp and Imp? When I Google "solarland 65W", the first relevant hit says 21.6 Voc and 4.21 Isc.
Are the panels part of a folding suitcase, or some such? The rating might be for the pair, not the individual panels.
โNov-13-2018 11:27 AM
โNov-13-2018 10:59 AM