I have a Magnum 1212 Inverter, and to my knowledge, it does charge the house batteries. How I know this is that the house batteries ran down, and the Inverter turned out to be bad after less than two years use. Fleetwood should have replaced under warranty, but refused, because their factory tech (Decatur, IN) tested it five times, failing the first four times, worked the fifth time, so management declared that it was okay. I told them unacceptable, put a new one in. Cost me over $1,000.00. Sent the bad inverter to Magnum in November, 2017, and they agreed it was bad. Since it was sold to Fleetwood in 2015, they would not pay for it either. Before Magnum was bought out, the warranty was three years.