Research what converter you have.
Most of them are cheap, inefficient and easy to overheat.
I just measured my converter takes almost 3 amp @120V when all the breakers on it are off and battery disconnected.
"Power that goes nowhere"
Than the build-in charger goes over 14V what on long run will boil batteries and overheats very easy with high charging current.
The best way for charging I figure out is to take my computerized 25amp charger and power it from 800W generator that Harbor Freight sells for $89.
This way you have efficient charging without danger and don't wear out expensive generator. (I also like to have back-up and light generator fits the bill just fine)
Obviously I am timing generator run with using my coffee maker or running microwave.
The 800W generator handle both just fine.
