That would be cool. I can tell you from experience that it won't last long. About a month ago I awoke to about a foot of snow. I had put studded snow tires on Grendal (the Prius) two days before. After trying to get out of my driveway for about 5 minutes I broke down and made a path with the 4X4. When I got back in Grendal I noticed that the battery was discharged enough to light up the warning lamp in the dash. I think I had one bar left. This was under very heavy load but it sure didn't last long.