SJ-Chris wrote:
I've been reading up online about having different battery capacities and whether that is okay or bad. The system I acquired has a 12v 105ah connected in parallel to two 6Vs which are probably ~220ah. Is that inherently a problem?
YES. And you have a prime example of why.
Good 6 volts in series usually have more total capacity than an equal number of 12 V is parallel.
IF.....you don't really need a huge amount of capacity, I suggest you convert to two of the largest 6 V deep cycles that you can find and be done with it. If that is not enough capacity, 4 6's in series parallel would be easier to deal with than the mess that you are starting out with.
It looks like 3 of 4 of your existing batteries are shot.
NO WAY should you try to duplicate that ill-advised lash up with new batteries.
