In this case, don't you think it would eaiser to just connect the inverter to the vehicle battery in her car and run an extension cord inside?
McIlhenny Company has survived Hurricane Rita and will post more information once full power has been restored to our Corporate Office and Manufacturing Facility on Avery Island, Louisiana.
Yes, that's the easy way- you just have to be careful to not run the vehicle's battery down too much to crank the engine, or keep the engine running to charge the battery.