Hi Jeff and gang, I have a 10kw electric motor supplied by a 48v lithium ion battery bank. Can I charge my 12v house battery from it or, do I need a separate charger (as suggested to me by my surveyor). Right now it has a cheap Canadian Tire plug in for the 12v battery. If yes, what kind of converter do I need? - Etienne
For charging your 12v battery we would recommend using a 48v-12v DC-DC charger. That way when your 48vDC bank is charging from shore the power will be passed through to the 12v battery.
Here is a link to the product we use for this purpose - the 48/12/9a model is $200 and could be shipped to you in Ontario.