Purchased new 2015 Solitude in September. When I took it home, checked battery and it was low, put it on a charger for 12 hours, chaulked this up to "while in dealers lot, slides in and out, lights etc from people looking at it. After two camp outs, both on shore power I checked battery again, it was low! Question, is there a charger in the unit? And shouldn't the TV charge while under way? Anyone else have similar experiences?