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harryf24 asked

Can I connect two 12V - 24V DC-DC chargers in series to output 48V?


I'm putting together a camper electrical system and was wondering if anyone has had any success with charging 48V batteries off a 12V alternator using two Victron DC-DC chargers?

There are two options I'm considering,

1) Use two 12V/24V B2Bs connected with the outputs in series. I.e. the inputs are connected in parallel to the starter battery and the outputs are connected in series. Negative of one b2b and the positive of the other, connected to the leisure batteries and the other terminals connected.

2) Connect one 12V/24V B2B and one 24V/48V B2B in series. I.e. The inputs of the first B2B connected to the starter battery, the output of the first and input of the second connected to each other and the outputs of the second connected to the leisure batteries.

Would either of these options work or have any drawbacks?



battery chargingorion dc-dcalternator48v battery
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