Hello. As I mentioned earlier in this thread, I am not a fan of breaking the bank into two or three different placed battery(ies) but given the choice of butchering the Underhood area as RoadTrek is doing to place 2 6 volts there is still not an option for me. I have major problems in ripping that area apart and relocating hugely expensive modules for just placing two 6 volts there.
Since I posted about adding another two group 31 under the bed, I have been very impressed with the results. With the two group 31's currently in use, I am getting exactly the same voltage readings at both batteries under the exact same charging parameters. Alternator, PD charge converter and solar (albeit only 95W) and have found the discharge and recharge voltages to be identical. I feel that with the two group 31's in place now, both are connected to the MB terminal block under the drivers seat and then each battery is on its own 6 foot cable from that terminal block.
My questions are these, and I hope you could be more specific about the problems associated with this current setup and having the need of a "complicated" wiring setup and what benefits it would bring. I realize the two batteries are on their own 6 foot cable but they do connect at a common point where they are fed a charge from all sources. I fail to see how one battery could be chronically under and or overcharged. Also I have a hard time understanding your claim that they could only last a year at most.
If you have the wiring schematic which is complicated or convoluted to install I would really welcome looking at it. Like I said, the under hood 6 volt setup was not an option for me. I really fail to understand the problem in the current setup but would love to hear your suggestions.
Having worked with electrical and electronic systems for over 40 years, the only thing I could see that could equalize the charge to both batteries would be the addition of another, uninterrupted cable between both batteries positive terminals (not running through the terminal block). By the way, the existing wiring layout from MB and PW utilizes chassis ground for all battery interconnections and their power to all coach circuits. There is no negative wiring at all. It is all through the chassis. This means that both batteries are connected in a fully bonded way on the negative side of things to every source of charge and every source of draw. Do you feel a separate cable that would go between both positive terminals would create a better source of equalization? Any input would be helpful!
Thanks!