I’m in the process of designing/speccing the electrical component for my sailboat’s diesel/electric propulsion system. I’m primarily looking for some advice on what BMS and battery combiners/disconnects to use.
The propulsion unit comprises a 48V Hybrid-Marine diesel-electric motor/generator. As an electric motor it can consume up to 10 kW, so the BMS will need to handle a load up to around 250A at 48V. As a generator is can produce 6 kVA max, so again, the BMS will need to cope with a charging current of up to 150A at 48V. The system’s controller has LFE charging profiles, but is not a BMS as such.
I’ve pretty much decided on a Victron Quattro 48/5000 and 2x Victron LiFePO4 25,6V/200Ah (in series) as a storage solution. House is an existing separate 12V system that I intend to cross-charge using the inverters, so there will be no other DC loads to worry about, only the electric motor.
I’ve looked at various scenarios of the Victron BMS products, but I can’t find one that has both the generator and load on the same side. The only scenario that comes close (that I’ve found) was using a VE.Bus BMS and a Cyrix-Li-ct combiner to cater for a separate starter battery on the engine/alternator side. Is that something that would work for my much bigger electric motor load?
Any advice is appreciated.
