No amount of solar panels will generate electricity without sun light. Also the amount sun light can shrink quite a lot in winter months at high latitudes and under cloud cover.

No amount of wind turbines will generate electricity without wind, or to be more precise:

Cut-in speed: 3–4 m/s (12–15 km/h) to begin spinning and producing power.

Cut-out / Stop speed: Above 25 m/s (90 km/h) where brakes are applied to prevent mechanical damage

Germany has to have backups, currently quite expensive, for all this times of missing renewables production.

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boshomi an hour ago | parent | next [-]

The apparent volatility of electricity generation from a single wind turbine is negligible, because what counts is the wind and PV output over large areas. Due to regular weather fronts, electricity output from wind and PV in Europe is surprisingly stable; when there is less sunshine, there is more wind. In 2025, for example, the weekly electricity output from wind and solar PV was 14.0 TWh, with no week falling below 10.5 TWh. If more wind power were installed in Eastern Europe, the curves would flatten out even further.

https://www.energy-charts.info/charts/energy/chart.htm?l=de&...

	▲	leonidasrup 13 minutes ago \| parent \| next [-]
		Yes, single wind turbine is negligible, what counts is the wind and PV output over extremely large areas because weather fronts are correlated over hundreds of km. Of course night/day cycle is correlated over whole Europe with few hours shift. So in 100% renewables Europe scenario, you have build multiples of renewable production in each region. You build enough renewables in Western Europe to power the whole Europe, you build enough renewables in Central Europe to power the whole Europe and you build enough renewables in Eastern Europe to power the whole Europe and build electric grid to transfer 2/3s of electricity produced in each region into other regions. Can it be done? Yes, but it will be very expensive. Many renewable energy modelers often ignore realities and costs of physical electric grid and model whole continent as copper plate which can transfer infinite amount of electricity from each to point to any other point. For more realistic scenarios German government is looking into power-to-gas energy storage systems, where you convert renewable electricity to hydrogen, ammonia or ethanol and store it underground. There are also plans to import large part of these gases/liquids from other countries, so no energy independence in the future. https://www.bundeswirtschaftsministerium.de/Redaktion/EN/Pre... https://www.cleanenergywire.org/news/germany-revise-hydrogen...
	▲	BenoitP 34 minutes ago \| parent \| prev [-]
		Took your link, changed de to en, reduced granularity weekly to daily. It looks way more spiky: https://www.energy-charts.info/charts/energy/chart.htm?l=en&... Also, both wind and solar (especially solar) change vastly under a sub-daily aggregation.

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flaburgan an hour ago | parent | prev [-]

I think the point is, if you can decide when to consume electricity then you will do it when it's the cheapest, so let's put the cheapest when the low carbon sources are available. So the website is taking into account that renewables are not always available, that's exactly its point.

And the backup source for Germany is the nuclear electricity from France. The grid is at the European scale.