If power is interrupted, by Mother Nature or a little one unplugging the appliance, your pellet equipment will not function. When power is off, there will be no additional fuel delivered to the burn pot, so any fire that’s burning will continue until it simply burns itself out. If there is some rise to the venting profile, the smoke from the dying fire will be naturally drafted up and out of the stove. This is why it’s always advantageous to have at least a few feet of rise in the vent system. Without any rise in the venting, there is a distinct possibility of smoke spilling back into the house.
There are more and more models today, that have a battery back-up/inverter system as an option, or some as standard equipment. These types of back-up systems may provide enough electricity to power your stove, up to 24 hours. Keep in mind that batteries will require some routine maintenance, as well as the stove.