I have been on this forum for a while, and have never heard of such a thing!
If it is true, it is an amazingly stupid set-up. I have a single use 2000w inverter that does need house batteries, but if I have shore power I don't that inverter at all.
I have a converter/charger that does not need any batteries to make 12v from 120v. So I would be fine on shore power with no batteries at all.
Hard to believe an expensive inverter/charger instead, would require a battery to even run its 120v. What about using the engine battery to get the inverter/charger operating using the boost interconnect that Class A MHs have?
Just ridiculous!
