[lacrew]

The 10 hr charge gets the Volt about as far as a gallon of gas.

How much coal is that?

By my calculation, 9.75 lb of coal.

A gallon of gas weighs around 7.1 lb.

Sounds green to me.

[Redalways]

You cite 10 hours as the recharging time, but the General Motor says it takes 8 hours or 6 hours, depending on the type of charge, and in the case of a wall-mounted unit in the owner's garage, as low as 3 hours. From the GM website:

Recently GM revealed the production charging equipment that will come with the Volt when it can finally be bought. There will be a portable 120 V unit (R) that can be plugged into any standard receptacle. It will be able to recharge the car fully in 6 hours at 12 amps or 8 hours at 8 amps.