Harbor freight has a 145 watt 3 panel kit with a cheap charge controller that I got on sale for $140.
When we went camping on Memorial Day weekend we were dry camping. It was cold at night and we ran the heat all 3 nights, Used lights and water pump as needed, along with having the stereo playing most of the weekend.
I'm not a solar Guru but I can say this got us through a long weekend with no issues at all, though my batteries were pretty weak when we packed up Monday to come home.
Maybe this will do what you need it to.
