[InefficientRed]

> days or weeks

The eF150 gives you a couple days. The Prius is a better solution if you really need backup power.

[MisterBastahrd]

They're not running it non-stop though. They run it about 4 times a day for an hour each time, and ONLY for those appliances.

[InefficientRed]

In that case, the prius prime battery alone is probably sufficient for several days. And it's 30K less than the eF150. And you can actually buy one off the lot today. :)