$20 Solar Battery Maintainer
I had one of these el cheapo gadgets laying around. So when we left a car in the garage for a few months while away, I plugged it into the cigar lighter and set the panel near a window. That lighter...
Forum Discussion
You said you were gone several months and had done this same thing in years past without the solar maintainer. Is this the same battery? If so maybe the battery has had it and needs to be replaced. Even the gypo solar maintainers have a diode(s) to prevent electrical back flow during the dark hours.
