This is sort of an off-topic "rant and opinion" but I read that guys diary and it appears his battery bank lasted about 6000 miles. For an ordinary person, driving 10,000 miles a year or so, that would be unacceptable.
Another thing that bugs me is how he brags that his car has "zero emissions". Where I live, most of our electricity is provided from coal fired plants so anyone using an electric car here is just moving their emissions a couple hundred miles away. And how much embodied energy does a person use replacing hundreds of pounds of lead acid batteries every 6000 miles?