Excuse me, there are two batteries on my boat, A is STARTER BATTERY (70AH), B is LITHIUM (80AH), I installed Orion-Tr DC-DC Converters (12V) in the middle to isolate the two batteries, the engine is directly connected A charging, when A battery voltage is sufficient during driving, B battery will be charged through DC-DC.
I want to use a charger to charge battery A when the ship is towed back to shore, and then charge battery B through DC-DC. I don't know which charger and how much current charger can be selected for this configuration to avoid overheating?
*****Please forgive my english*******