In my travel trailer I'm in the process of installing 3 105 A-hr LiFP batteries and a 3 KW Victron Multi-plus inverter charged from 500 W of PVs controlled by a Victron 100/50 MPPT. The LiFP batteries, ect. will be about 20 ft from the existing batteries up front. I'm wondering if it is possible to retain one of the lead acid batteries and charge this from the LiFP battery pack? This way I would isolate the LiFP circuit from the existing 12 V lead circuit which has some benefits such as smaller wire to the tongue jack and retain the converter and tow vehicle charging. I was looking at a Victron Orion 12 V to 12 V 30 amp device but it doesn't appear to really be a charger for Lead batteries. It could be made to work by adding a switch or relay but I want something simple and automatic. Also, it appears that the LiFP voltage will at times drop too low for Lead acid charging.
Should I just give up on this idea and buy heavier cable and add small voltage regulators for any sensitive devices...TV or example?
David G
Should I just give up on this idea and buy heavier cable and add small voltage regulators for any sensitive devices...TV or example?
David G