problem with solar panels

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

Hi Tom;
Go directly to a battery and see what you get.

[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.

Anyone know where I can get some diodes?... Lol

[quote=Tom Berens]Anyone know where I can get some diodes?... Lol[/quote]these days digikey Ebay robotshop or amazon. Dirt cheap.

Some used electronics will have fat diodes.
If the diode is bad the panel will only drain your battery when it's dark out.