I've read of this on other forums, but curious what you think.

I bought two small 1.5 amp solar chargers, about the size of a sun visor that plugs into the cigarette lighter. $12 each with coupon http://www.harborfreight.com/15-watt...ger-68692.html

Thinking of putting them both in so it would keep the 12v charged when sitting. I would also think this would help charge the 12v battery when driving so the 330v battery wouldn't have to as much.

This probably won't do much, but would it work?

 

Nope