Ah, so not only do you not know the difference between stocks and flows, you’re unable to figure out very basic ideas like “you don’t have to solve all of a problem in one go”. The UK doesn’t need to have a solution for dunkelflautes today. It can carry on decarbonising the 90%+ of annual electricity consumption that does not get used during dunkelflautes, and keep the gas peakers and their gas in reserve for that 10% of demand.
The UK today uses 270TWh of electricity annually. About 50TWh of that happens in winter lulls, ie periods combining cold temps, low wind & low insolation. So a little over 80% of current UK electricity demand can be covered with wind, solar, nuclear, intraday storage, stacking flexibilities, etc, with practically no calls on gas. Gas peakers can deliver the remaining 20% (albeit they only have to cover most of it, not all of it, nuclear etc will still be there, wind doesn’t drop to zero, etc). And as the price of renewable generation assets and battery storage continues falling, we can build out more and reduce that 20 to 10 and 5 and one day zero.
We’re at a touch under 190TWh of low-carbon generation today in the UK. We can focus on the 30 needed to get us to 220 over the next 5 to 10 years, and bearing in mind it’s a moving target / virtuous circle of increased electrification of heating and transport, by the time we’ll get there, we can do another 30 and another 30 after that without needing to worry about turning the gas peakers off and shivering through a dunkelflaute. This gets us into things like strategic reserves and temporal arbitrage, but don’t worry your pretty little head about all that.