One thing that puzzles me is why electric car manufacturers do not us a small fossil fuel powered generator to extend the range of electric vehicles. They could either save costs buy using less batteries or have an unlimited range so long as you have fuel. I would be first inline to purchase one.
This product launched late last year may just fill that gap.
MiTRE Range Extender
The MiTRE (aka Micro Turbine Range Extender) is a tiny form factor motor and generator which can charge up an EV battery as the car is moving. No more worrying about flat batteries!
The MiTRE is around 40% smaller and 50% lighter than an equivalent piston engine device, and can be used both to help extend the range of an electric car, and also enable manufacturers to make EVs with smaller batteries in them.
The unit was launched embedded inside a custom made vehicle, although it was not shown running. The unit can generate power from petrol, diesel or eventually biofuel, although the company is still working on perfecting the latter two fuels. The key thing about the turbine is the fact that it can keep a battery topped up while a car is cruising at 70 mph on a highway, which is perfect for those longer trips. Of course the total range will depend on the size of your fuel tank!
The company was coy about eventual pricing, although a figure of around £1000 per unit at volumes of around 1000 units were mentioned. This means that in larger volumes it could even become attractive for the after market, with retro kits being sold to existing EV owners. The hybrid market could be about to get very interesting indeed.