A couple of points to add. Firstly I saw my first Tesla car on the road the other day, so not that common yet. I read that the battery for a family sized Tesla car weighs about 600 kg (12 cwt in old imperial weights), so what is the battery for a truck going to weigh? And secondly, there has been no response whatsoever from any of the major oil companies to the so called electric car revolution. These massive and powerful companies have most to lose if electric car and trucks assume prominence, but their silence on the subject is strange. Do they know something that we don’t?