[spacemanspif]

I always thought that the diesel injectors were electronically controlled and turning the key back stopped them from firing, thus, stopping the engine. Even on old ones there must have been some kind of timing device to control the injectors, otherwise they'd be shooting fuel in all the time...

I like the solar panel bed cover idea. Pair it with multiple deep cycle batteries mounted in the bed and you would have quite a long range between charges from grid power. Don't forget that you still need a belt to turn the waterpump!