Germany will need a total of 1,867 TWh per year in 2030, so an average of 155 TWh/month.

fossil fuels are very inefficient when used in most applications (especially ICE and oil for heating). As countries use more and more electricity instead of fossil fuels to generate motion and heat, total energy demand will decrease accordingly.

Currently, Germany imports almost all of its fossil fuel from abroad. Mainly Norway, USA, Gulf countries, etc. Russia used to play an important role and we paid dearly for that. As we are for the reliance on the US, I guess.

We could actually bring our energy dependence closer to home and make it cheaper by substituting fossil fuel imports with solar + battery with the PV part being distributed across northern African countries. But most likely it will be more convenient (if less efficient) and politically desirable to create a mix of domestic and souther European sources, with specialized stuff like H2/Green NG imports from Iceland and other energy rich places being mixed in.

Also, Germany will (and does) a large share of it energy requirement not from solar, but from wind. Already, renewable energy has very much softened the effects of the Iran war on electricity prices. They never exceeded the highest levels of 2025, while fossil fuels jumped to levels last seen immediately after Russia's invasion of Ukraine and are still elevated over 2025 levels.

> How on earth do you expect 7-8 to be enough? 300 isn't enough either. The real number for a fully renewable-based grid here is somewhere north of 2000.

2.000 hours of storage would equate to 83 full days of electricity demand. That's on its face absurd. Most models assume that a "Dunkelflaute" (span of time with significantly reduced solar and wind output) will last at most 10 days. Add a few days as a safety margin. And that is all of Europe becalmed and dark, as the entire European electricity net is synchronized and transfer capacity between various regional grids is continuously expanded.

Power transmission is a thing. And where you can't lay down a transmission line, you can convert electricity into h2 or methane and put it on ships, just like we do with dino juice.

I think it also depends on other stuff. Spain gets bunch of sun even when there's the deepest winter in Finland but even if they are technically part of the same grid, the challenge is getting the energy there.