I have an RV with 12v chassis and 48v Lithium house bank. 99% of 48v charging is from 2100 watts of solar. 1% is from the Charger on my Multiplus II. I want to add the ability to charge from my dual 12v alternators but Victron does not make 12-48 DC to DC and the alternative brand is only 700 watts.
If I were to add a Victron Inverter to my 12 volt side and connect the 110 volt output into the 110 volt input on my Multiplus II would the Multiplus II accept the current and charge the 48v bank. I would program the Multiplus II to limit the current to less than the 12v inverter output.
On a previous camper I had a Renogy Inverter charger and would connect to a friend's Class A with an Onan generator. If the generator cut off the Class A would switch over to it's onboard Inverter and it caused a fault on my Renogy. It did not work with the input coming from another inverter.
Thank you
