Seite - 10 - in Our Car as Power Plant

10 We use our cars only for a very limited time. If we drive 20,000 km per year with an average speed of 50 km per hour, the time we use our cars is 400 hours – less than 5% of the time. Our car, a major asset for us all, that we use less than 5% of the time? So what else can we do with our car; when it is parked? Once we build fuel cells into cars it is possible to produce elec- tricity, with a high efficiency. That is interesting: the fuel cell in our car has a capacity of 100 kW, which is more than sufficient to produce all the electricity for about 100 European houses. So our future fuel cell cars can produce all the electricity that we need – with a better energy efficiency than the present power plants.