Precisely.
Which makes wind energy essentially useless a a large scale part of electricity generation without some form of carry over energy storage.
Or the ability to run the country off batteries of some sort (including e.g.pumped storage) for several days on end.
In the limit, that's why you need 6 times as much peak capacity as your average needs. It could be worse. Let's say that on the bad patches only
40% of your kit is working at only 30% of its rated output.and the rest ain't working at all..a mere 12% of its 'rated output'Which is why wind energy will NEVER be more than a small fraction of generating capacity.
Dynamo Dave keeps spouting on about '30%-35% average load factor' So what? in the end if your power goes out for 5% of the year, who cares that your average performance is good.
Heck, I won't tolerate even 0.3% - one DAY of total power cuts.
That's precisely the issues the Danes are finding. The more windmills they plug into the grid in preference to baseband reliable power, the more expensive and inefficient gas turbines they need to back them up when they can't actually do the job.
IF we had a cheap way to store the energy, it would be fine. We don't..not at the sorts of scales we need. Not for days on end.
The pumped storage systems in place can supply a few percent of total - they are very useful for smoothing out extremely short duration peaks and troughs, but not for maintaining huge energy reservoirs.
I suppose you could make hydrogen, and then burn it in gas turbines at
30% efficiency. Not hugely useful..fuel cells at that power level have never been attempted.