I'm in the process of fitting electric affairs to VW Crafter and chose victron products. So far I fitted smart solar mppt 100/50 controller, 630W solar array, 360ah 12v lifepo4 battery bank, Orion isolated 12/30 charger, BMV712 monitor and Multiplus 12/2000/80A inverter /charger.
Now looking for solution of maintaining starter battery whilst car is not used and multiplus inverter won't be running. I don't see any easy setup which would offer multi-stage charging /maintaining except BLUE SMART IP65 CHARGER 12/5 plugged into inverter which requires running inverter 24/7/365
I understand that multiplus inverter /charger doesn't offer reasonable solution.
Just wondering about the interference of following setup :
Currently running intermittently Orion isolated DCDC 30A charger when solar is not producing enough. How about using Orion DCDC converter the other way from house batteries to starter? I have the feeling it's possible only once DCDC charger is off, maybe double latch relay connecting / disconnecting both systems respectively from ignition feed /running engine feed?
Still would rather use car charger 5A with 7 stage then converter (size, weight, price difference).
Also how is the multiplus gonna be happy with only charger drawing measly nothing when run virtually without load for months?