I've got enough solar to handle conservative needs....in the sun....but we're primarily Pacific NW campers, sooo we carry a 2200w genny. I'd rather not use it at all but that's a fantasy. When I do I want it fast. I've got BFL13's pot mod at the top of my list now...and the warranted version at #2 :-) I'm intrigued by the adjustable voltage to handle different objectives, different batteries or different temperatures. All this may not be that big a deal but if I can't find out I'll never know. I'd forgotten about generator limits but I think my genny will push the 75a charger.