Yes, it's carneval time, even if nobody notices due to corona. It is a good tradition that carnevalesque lectures are given at this time (evil tongues claim: not only then...). A popular german TV professor was probably also inspired by this, since a video of him with the following content went through the net (from "Terra X Lesch & Co", June 2019):
"So let's assume that a million vehicles […] now want to charge quickly [...]. So each car draws 350 kilowatts. A million, that makes a total of 350 gigawatts that then have to be provided. Well, now let's look at our electricity generation, the maximum was almost 70 gigawatts on April 19, 2021. So even given twice as much wind and solar power, it should be impossible to charge a million cars at the same time with 350 kilowatts".
What…, already 1 million charges would overwhelm our entire power generation infrastructure by a factor of 5? Given that, electromobility can’t work! True?
The calculation is correct, but the derived conclusion is wrong:
- A charging car draws around 7kW of electrical power on average, so we already have 50 million charging cars given that consumption
- not all charge at the same time. A more detailed calculation shows that with a charging capacity of 350 GW, the entire daily requirement for 100% BEV’s (battery electric vehicles) would be recharged in about 1 hour
So: don't trust anyone over 50, and certainly not a professor...
But of course... there are more than a few “little” problems. What if by chance too many want to charge at once and the network is regionally overloaded. How can incentives and means be created to distribute the load over the day matching the supply, and and and...
Lots of exciting tasks, help to solve them! The faculty's degree programs in the fields of automation technology, renewable energies and electromobility enable you to do this.
So: Fak E** instead of fake!
*) carnival call of the “alemans” in southern Gemany, means somewhat like “fool-i-fool-a”
**) Fak E is the abbreviation of “Fakultät für Elektrotechnik” (Dept. of Electrical Engineering)