An ever-led argument of electric car opponents is the claim that the electricity vehicles would take the German electricity grid too much and in the worst case would even be paralyzed. A thesis that has been refuted several times is available more than enough energy to electrify all cars: One million electric cars would increase power consumption by only 0.35 percent, such a current report at company car.de, in which several energy experts come to speak.
The invoice was based on the typical driving profile of an average car. Is called: 12.500 kilometers per year, energy consumption 15 kWh to 100 kilometers, makes an annual consumption of 1875 kilowatt hours.
Even the complete conversion of all German cars – at least more than 40 million pieces – on electric drive would lead to no energy bottlenecks, even if they are supplied exclusively with electricity from renewable energy sources, such an official document of the Federal Environment Ministry: “There are far enough renewable energies to electrify the entire German car fleet, “it says there. Large energy companies like Eon and Innogy share this opinion.
However, not “the energy quantity of the expected electric vehicles the critical size”, as Innogy says. Problems could come, a large number of electric cars should be connected at the same time on the electricity grid at the same time, for example at 6 pm, when people come home from work on how to consider a study of the consulting company Oliver-Wyman: with a local network size of 120 Households would already be sufficient for 36 electric cars, “to overload the network locally,” it says.
“The problem that people all invite at the same time, almost does not occur in reality”
However, this extreme scenario barely realistic, like company car.DE researched: “The charger hythus of the inhabitants is so different that we did not yet come close to a bottleneck situation. Of the ten electric cars, a maximum of five went to the net at the same time – without we influenced that, “said about Christian Bott, who heads an e-auto project for ENBW in Eastfildern. The same was shown a further project of the energy supplier Allgau overland a few years ago: “The problem that people invite all at the same time, almost does not occur in reality,” said project manager Robert Koberle.
Nevertheless, one must admit that there is a theoretical possibility that networks could be overloaded in part when 80 or 90 percent of cars are electrically in Germany. But this too can be influenced or. Prevent without any costly network expansion: by loading the electric cars intelligently and flexibly, how even the critical Oliver-Wyman study admits.
This “backup” could be supported by the construction of local energy storage, as it has tested networks BW in Ostfildern. But the expansion of the network will continue to be examined as an option. “The royal road is not found yet”, sums up company car.DE, but it is definitely fixed: “For the network operators, there is still a lot to do on the way to the e-auto-age”.
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