Okay, I have convinced myself I need 2 6v true deep cell AGM batteries, then I can get rid of the vented box and have plenty of room for 2. What is a good "ah" number? The ones I am looking at are 225ah that seems pretty good, but are there better ones out there.
2013 Jayco Eagle HT 26.5RLS
2004 GMC 2500HD CC SB Duramax