Seite - 77 - in Our Car as Power Plant

77 Charging the batteries of your electric car with electricity and also using your electric car as an electricity storage is the first step in integrating the transport and electricity system. But with the introduction of the fuel cell car we even get more and better possibilities for an integrated transport- and power system. The fuel cell in the car can produce electricity with a high efficiency. For transport it means a higher overall efficiency, a long driving range and short fuelling time. For electricity production it means a larger system efficiency than the present power system efficiency. Moreover: a very flexible and vast amount of capacity that can react on every demand- and supply fluct- uation all the time. At first, when fuel cell cars will be introduced to the market, we still have a power system not fully based on renewable sources. We will therefore produce hydrogen that we can fuel in the tank of our car mainly from natural gas. And at the time we have parked our car we can produce electricity with the fuel cell in our car when there is a need for it. Of course we use first and directly the electricity that is produced by renewable resources, hydropower, geothermal, waste/biomass, wind and solar. But in the end all the other electricity could be produced by the fuel cell cars. This system change means that we will use more and more gas in our transport system, but also in our power system. And of course not all the cars will be fuel cell cars. There will be certainly a lot of cars that drive electrically with a battery only to provide the electricity. Therefore also the demand for electricity in the transport system will still grow.