Hi Cee,
If you are planing to replace the inverter then I'd strongly urge you to consider a 48 volt battery bank. If I were starting from scratch, I would certainly not do 12 volt.
I'd also consider a Victron hybrid. They don't seem to have the issue with GFCI outlets that my Magnum has. I.E. it appears to not be loved by some gfci--but others it works just fine with. It is not a fault in the RV, for if I wire around the Magnum, the gfci does not trip.
BoonHauler wrote:
Cee
PS: I'm looking (in the not too distant future) to change out my MS inverter for an MSH. You and I have a lot in common although I'll stay away from the resistance heating.