If I were to do my P1k5 again…I’d skip the isolator bs and go straight to a disconnect and a car battery under the drivers seat. If you got big continuous draws, you’ll hate the isolator.
Seriously…cheaper, and far cleaner.
My winch, heater, lights when im plowing snow absolutely make the isolator wigg out in short order.. I got the same problem when im spraying pastures at low ground speed and the cooling fan, under seat fan and my spraying pump are all running wide out.
last winter I just bypassed the isolator and paired up the two batteries. No problems since. I’d put a car battery under the seat, but I already have a heater there.
Just a contrary opinion from my experience.