[Gem930]

I too went to a 48V system and decided to use the engine batteries only for all 12V and to charge from the 48V using a solar controller (vs a battery to battery charger), all by Victron, I saw no need to add another battery for the loads.   I have not had any issues with the system operating fine, even though the engine batteries are 7 years old and counting.




So you are using a solar charge controller connected to your batteries instead of panels? I wondered if that would work. I ordered 2 25 amp 48 to 12 V DC Buck converters to do the same thing, but I think the charge controller might work better.