Yeah, making it so heavy was a pretty large downfall too. The thing weighs nearly 3800 pounds.
And with an electric range of about 35 miles on a average temperature day is not much of a range. Up North right now in the cold weather it would be half of that. Then it gets only about 38 miles to the gallon burning gas used to turn a generator. They might as well take out the 435 pounds of batteries, let the gas engine drive the wheels directly, and get 40 plus miles to the gallon.