Unlike the Prius it only has an electric drive train with a gas generator.
And it's a hatchback with the seats folded you might just be able to sleep.
The volt is a sedan, but only 2 seats in the back split by a center console. I don't think that'd be very comfortable without an air mattress.
Here's an image of the new 2016/2017 volt with its seats folded down: http://www.tampabay.com/resources/images/dti/rendered/2016/0...
Unlike the Prius it only has an electric drive train with a gas generator.
And it's a hatchback with the seats folded you might just be able to sleep.