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Dirtdaddy's avatar
Dirtdaddy
Explorer
Jul 25, 2023

Question on Coleman 100W Solar Panel "open circuit" voltage

I have what looks to be a Coleman 100W Solar Panel with a 30 amp Coleman controller in the trailer. It doesn't really charge my batteries, so I checked the open circuit voltage coming off the panel an...
CA_Traveler's avatar
CA_Traveler
Explorer III
Jul 25, 2023
Are you using a digital meter with the panel in full sun? Voc (open circuit) and Isc (short circuit) are 2 basic checks for panel. A 100W 12V panel should have about Voc=18V+ and Isc=3A+.

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