went to our local motorhome dealerto ask how much to have a solar panel fitted to our warwick duo ended up coming out having ordered 2x110 amp batts fitted instead.they have had to order low profile batts to fit under seats ( passenger one swivels) .Their advice because ileave it on hookup when in storage at home.when we are away we only do two or three nights wild then find site with hook up to recharge.est £450 inc parts and labour ?