“How much does a charge last with the temperature at 20deg with the heater on high?”
Less than 15 miles, even without the heater on high. Eric Bolling tested one and never made it to work, twice!
http://video.foxnews.com/v/1430236461001/eric-bolling-test-drives-chevy-volt/#sp=show-clips
False, when the battery ran out of charge, the gas engine started and the car never stopped. He didn't make to work on only electric. The car made the trip.
In fact, Bolling’s video of his second drive to work showed the car seamlessly switching from EV mode to hybrid mode. The Volt didn't “break down.” Bolling made it to work and after one week reported his findings… the ones he wanted to find.
His chief complaint, as indicated above is that the car switched from electric to hybrid at only 25 miles.
I'm not a fan of the Volt, but the car is bad enough on it's own. We don't have to make up false claims to make it look worse, reality is bad enough.