I am going from one batt and installing a second one....that being said, the one battery I have now is a Duracell RV/Deep Cycle GP24.....first, I'm not sure how big a group i can go up to in my 230, whether or not a 27 or even a 31 but going to find that out.

I think I'm going with Interstate batteries and just buy two matching ones. I know nothing of Duracell RV battsm but do know of Interstates. Has anyone had good/bad experiences with the Interstate brand? I've read a lot of RV'ers do with a lot of brands that I'm not familiar with, so, for now, thought I'd stay with a more "name brand" to me anyway.

Thanks for your input.