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It's the same as putting 4 batteries in parallel. You only draw off the last battery, but all of the others back it up. One won't be overcharged, and the other undercharged. They are connected together.ions will travel from a greater concentration, to lesser concentration. In addition, the lmtv...

You are drawing off of one. The other will back charge it to keep them balanced out. The alternator charged both batteries at the same time. Heck, the lmtv has both 12 and 24 volt systems. You can do whatever you want, but your assumptions are incorrect.

This is nonsense. Running 12 volts off of one battery will just put a bit of a drain on one, but they are in series and the other battery will aid in back up and their charge will balance out. Many 24 volt trucks also have split systems, with both 12 and 24, with the 12 coming from one battery.

I just read this thread. Why did you go through all this expense, when you could have just ran a fuse panel off of one battery? With a disconnect, if you are prone to leave things running.