I found in the net some web sites where companies takes a standard car and make a conversion it into electrical, also DIY is available.
A few examples:
http://www.diyelectriccar.com/forums/
http://www.canev.com/kits.php
http://www.electroauto.com/catalog/d...ts.shtml#heavy
http://www.electroauto.com/gallery/911.shtml
So the question is – In the far future can you suppose, to change internal combustion engine in your troll to electric with the same or better characteristics or old troll should eat oil?
PS. Lets miss out heavy accumulators, less daily mileage or motor water protection it is a matter of time.