Thanks. That is how I was assuming. A hard to find piece of kit.

I've been working on the basis of 1.5-1.75miles/kWh. My current diesel setup gets around 24mpg, (less when I drive too fast) which I've used to base my calcs on accounting for the equivalent energy per litre of fuel, however, a 4x4 will likely get worse milage. Re: the 4x4 conversion, I've not ...