What about something like this:
http://www.amazon.com/Sunforce-50048-60W-Solar-Charging/dp/B000CIADLG/ref=sr_1_13?ie=UTF8&qid=1430494210&sr=8-13&keywords=rv+solar+starter+kit
OR
http://www.amazon.com/Renogy-Portable-Folding-Battery-Charging/dp/B00JX3XKFC/ref=sr_1_11?s=lawn-garden&ie=UTF8&qid=1430494252&sr=1-11&keywords=rv+solar+kit
OR
http://www.amazon.com/ECO-WORTHY-120watts-Polycrystalline-Portable-Folding/dp/B00MGLIIQO/ref=sr_1_sc_10?s=lawn-garden&ie=UTF8&qid=1430495712&sr=1-10-spell&keywords=portable+solar+pannels
OR
http://www.amazon.com/ECO-WORTHY-Portable-Folding-Charge-Controller/dp/B00ICE0ES4/ref=sr_1_sc_15?s=lawn-garden&ie=UTF8&qid=1430495712&sr=1-15-spell&keywords=portable+solar+pannels
