If you need more energy in the winter, you build more wind power, not PV to store it an entire year.
And episodes of little wind+sun have a duration of less than a month.
And there are more storage use cases, e.g. short term grid stabilization (<1 second).
https://blogs.scientificamerican.com/plugged-in/wind-pattern...
Perhaps southern Europe will counteract as well: less need in the winter and energy required for increased cooling with heat pumps in the summer
If you need more energy in the winter, you build more wind power, not PV to store it an entire year.
And episodes of little wind+sun have a duration of less than a month.
And there are more storage use cases, e.g. short term grid stabilization (<1 second).