jplante4 wrote:
If I'm following the math, I'm really not adding that much capacity switching to 6v, so I may just say screw it and do 12V AGMs and stop carrying around distilled water.
Well if you currently have G27s they're each likely rated at ~ 90 AH apiece for a total of ~ 360 AH at the 20 Hr rate for four of them connected in parallel. Sure, you can say "screw it" and opt for more costly AGMs but for the investment you're going to have to put out you darned well better make sure you can properly recharge them, particularly when you're not using solar but rather a 120 vac converter / charger to maintain them. Many AGMs
require temperature compensated charging which almost no converter installed in trailers these days is capable of, otherwise you'll be replacing the much sooner than you expect. :M The devil is in the details. ;)