I’ve got a AC200P Bluetti in a Dodge Promaster campervan that I use for lighting, heating, fans, frig, etc in the van. I’ve wired in the van battery through a 12V to 24V converter to boost the charging power from +/-100 Watts to +/-200 Watts (it works well, though I use solar most of the time). We’re going to be off the grid in Alaska this summer, so I was thinking of creating a wiring harness to utilize the Bluetti to charge the car battery in case it went dead. My thought was to bypass the 12V to 24V converter, and run 12V DC from the Bluetti to the battery via the existing wiring, using the aviation plug hooked to the wiring (I’d have to unplug the aviation plug that serves my existing van uses during battery charging). My concern is what would regulate the amperage to the battery - it might pull a high charge and trip out the Bluetti.
I suppose if I wanted to play it safe, I could just use a store bought AC battery charger and plug it in to the Bluetti, but that would be much less efficient, cost more, and require more room in the van.
Thanks for any thoughts.