Posted 5/14/2025 21:41 (#11225153 - in reply to #11225098) Subject: RE: Testing a solar charger for battery on tender trailer.
Wisconsin
It would help to know the wattage of the solar panel. And know that you're starting with a good battery, a solar charger won't bring back a dead battery any more than a plug in charger.
To test the output, start with a good battery that holds a charge, it should be 12.7v or so, hook it up to the panel, the voltage should rise fairly quickly above 13v,