AC battery charger and a solar panel denoted by the 14.4VDC source, crank that source down under 13V and it switches "off", e.g. it doesn't reach breakdown potential and can't conduct, and the mains takes over, I like how little power my truck draws :) haha 'cept this snow is kinda making my solar panel useless, shit sucks, can't wait for summer, won't need the battery charger ;) Free energy this summer :)
