I've got two 306ah batteries that I built and just installed, they haven't even used 1 cycle yet. These are batteries I bought from EEL. Is there an issue with buying a 300ah battery like a Chins, Li-Time, Power Queen, Redodo...etc. and adding that in parallel so I have 900ah+ or two and have 1200ah+? Didn't know if mixing and matching same size but different brands would matter. I wouldn't think it would.