NaeClue

@GrumpyBuilder fair point but my van conversion taught me that where you put your insulation matters as much as how much — reflective foil under the roof skin before any PCM or wool does more work...

Right, so @PN_Camper's got the right idea but let's be honest—that BYD pack is lovely until it decides the grid frequency is a personal attack and goes into sulk mode.

Got a pair stacked in my van and they've survived everything from Scottish winter to Welsh damp without throwing a tantrum.

Mate, if your current setup dies looking at it funny, the real question isn't voltage—it's why you're underspecced.