Lithium for dummies: need advice in simple terms

I like making things more complicated than they need to be as much as the next guy, but it's actually pretty simple, even with the battery living on the tongue. I set up the heater per the manufacturer's instructions. It keeps the batt above 37 degrees-ish. The solar does it's thing. If I'm short amps in the evening I fire up the genny, charge at 45 amps for between 20-60 minutes and call it a day. Easy peasy. It most likely woulb be more complex at -30c but whose crazy enough to camp at that temp:)