Don't let terminology confuse you.
Electricity from the grid cannot be stored in a battery in its AC state.
A converter transforms AC electricity to DC. Then you can store the DC power in your leisure batteries.
DC electricity from the battery bank, doesn't have enough voltage to run your powerful AC appliances.
An inverter transforms DC electricity to AC. Then you can power your air conditioner, coffee maker & more.
CAMPER VAN CONVERSIONS