Construction costs are currently skyrocketing

So, now nuclear power plants have a utilization rate of over 90%, i.e. more than 8000 full load hours per year. They are super plannable and predictable and controllable up to nominal capacity.

Wind power in China has maybe 3000 or at best 4000 full load hours, hardly plannable and predictable, and how much of the nominal capacity is currently available is more or less a matter of chance.

With OPV (offshore photovoltaics) it looks even worse, in China you might have maybe 1500 full load hours.

So 5 kWp photovoltaic capacity then produces 7500 kWh p.a.
But 1 kW nuclear capacity produces 8000 kWh p.a.

In other words: newly installed nominal capacity without mentioning achievable full load hours is nonsense, big nonsense!
Or: for 4 kW from a wind/photovoltaic mix, you only need about 1 kW conventional capacity to produce the same annual output. Whereas the photovoltaic/wind mix is so erratic that it either requires a shadow power plant park of conventional plants or gigantic electricity storage.

That means for 1 kW secured capacity you need almost 1 kW conventional power plant, running in standby plus 4 kW renewable energy generators. Alternatively, 4 kW renewable energy generators plus storage (for photovoltaics at least a 2-month winter demand, for wind about 1 week demand).

Coal is at least a substitute for missing storage. Somehow you have to have something for power generation during nighttime weak wind, or you risk a blackout. In Germany, the latter is increasingly preferred, in China I strongly suspect the former.

Haha:D:D:D

Why not just 83 GW per hour? Per second would also be correct! GW is a power. You do not consume power, you provide it. Like a gasoline engine that provides 100 kW. The 20 liters of gasoline or 200 km of driving distance you can achieve with it in an hour is the work done. So work = power times time.

Now electric cars have batteries to store that work. So you probably mean 41 GWh storage capacity. That's what 83 GW of power plants deliver in about 30 minutes. But if of the 83 GW only 41 GW are available because it is night and the wind does not really blow, you could of course take the car batteries and feed their power into the grid. Provided they are all fully charged, no one needs to drive soon and they may therefore be drained to a state of charge (SOC) of 0, you could compensate the power plant park’s underperformance exactly for 1 hour, 41 GW*1h = 41 GWh. After that, it's game over! Blackout for days.

For comparison: in the year 2020 about 500 billion kilowatt-hours of electricity were generated in Germany. That is 500,000 GWh and you come here with 41 GWh... a factor of 12,000. Even if from the existing 600,000 BEVs there were 60 million someday, the factor would still be 120. And then nothing would be left for the actual purpose of a BEV (which is performing driving service).

And at the same time, from November to February, we have relatively little solar power across Europe, mainly only at certain times. If there is also a lull, it will certainly be tight in the evenings. It will take many years before cars can be used as storage. Neither inverters nor cars of the current generation are capable of this. So we are talking about at least 10 to 15 years until market maturity. Don’t get me wrong, everything is doable and must be tackled. But it is dangerous to believe that this transition could be possible within 3 years.

As I have already written, China is expanding renewable energies on a huge scale. This year alone, power plants with renewable energies are to be newly connected to the grid with a nominal capacity equal to all power plants and energy sources in Germany combined. After this year, China will be able to generate seven times the amount of electricity produced in Germany through renewable energies. Seven times the amount! And this amount will continue to increase every year.

I consider it rather unlikely that all renewable energies across Germany/Europe would fail simultaneously. They do not only consist of solar and wind, but also include hydro and biomass, among others. Moreover, there are still conventional power plants for the base load at the moment.

Thanks for this calculation. That's always the problem when people who have no idea like Habeck and Co want/are supposed to calculate whether it is sufficient. “the energy supply of Germany is secure.” Hahaha