posted 3 years ago
[quote=Tom Berens]I picked up some older panels, { kyrocea kc-80 } when I test them in full sun, putting out 20 volts, when I hook them to charge controller they drop to 9-11 volts and drain the battery. Any help out there?
Tom[/quote]hmmm.
The first step is double checking polarity, then checking the charge controller. After that you would want to check the diodes on the panels. If the diodes blew you could drain the battery through the panel.