Hi,
I am about to order 2*280-300Ah bats(lets call it PRIMARY battery for short)., but was thinking about more yet, there is no space for that much weight in single area of small caravan. Initially i was thinking about getting 2*460Ah, but it just wouldnt work space/weight wise for vehicle.
Lets say i would like extend PRIMARY field anyway, and would find other place for batteries on other side of vehicle(basically on opposite site of axle) distance between batteries is 2m and lets say i would be going for additional 460Ah later on, lets call this one SECONDARY BATTERY - i suppose function of this battery is just additional STORAGE, dont need to be use and only function is to charge other battery, but must get charge also from PVs..
Now question how we connect this together if i would like to SOCs(2) be able to charge all those batteries from PVs and also i can use them with ease?
For this b2b charger (now please pardon me as i have no idea how technicall b2b chargers works and how they are used) can be used, but that works only one way? i mean what i would need is kinda switch which can disconnect battery from other once i dont wanna charge discharge happend, set charge SECONDARY->PRIMARY and plug SECONDARY into charging from PVs. But technically and safely to do so i have no clue, but there might be someone who did smth like this.
