I am trying to figure out how to safely and efficiently charge my 48V Pylontech 4.8kWh US5000 LiFePO Battery setup using my narrowboat engine...
I have been advised by a trusted boat electrician that drop-in batteries like pylontechs can’t be charged directly from alternators, not even using regulator-controlled high-spec alternators, as the stop charge signal from the Pylontech BMS causes too much of a voltage spike that would damage the alternator and the regulator…
Can anyone advise on how I might be able to resolve this without losing too much of the efficiency of charge that lithiums offer?
I have heard people mention hybrid batteries (using a Lead Acid battery to absorb or protect from the voltage spikes somehow?), or using a DC to DC charger from the 12V starter batteries (I would assume this would negate the efficiency of charge that you can get with Lithiums, but maybe there's a setup that works around this)?