The gas igniter is a second and you pass it up so it stops. After that no electric is used for the gas. An oven needs a heat source when it shuts down and needs to start again. But a battery and inverter are power hogs. You need to charge them. Augers in a pellet stove are hungry. How long will a 12 volt battery last taking it to 120 volts? Need the charger feeding the battery and it can ruin the battery fast.