However, with generation from solar - Germany’s second largest source of clean electricity behind wind - set to plunge this winter due to reduced daylight, Germany’s total clean power generation looks set to decline just as energy consumption levels rise from higher demand for heating.

There's a big push in Germany to install heat pumps. If people doing that are getting dual air conditioner/heater systems installed, it may be that it'll increase summer demand for electricity, and that'll mitigate some of that.

As things stand, Europe's peak electricity demand is during winter, due to electricity-powered heating.

In the US, peak electricity demand is during summer, due to air conditioning.

What you'd ideally like is, if your generation is non-dispatchable, for demand to more-or-less track when power is available. In general, solar is going to tend to be generating at the right times if your peak load is from air conditioning, and the wrong times if your peak load is from heating.

European adoption of air conditioning is increasing.

https://www.euronews.com/green/2023/08/02/europe-reluctantly-turns-to-air-conditioning-as-heatwaves-bite-data-shows

In Italy, sales of air conditioning units grew from 865,000 a year in 2012 to 1.92 million in 2022, according to the industry association Assoclima. These were mostly for business and not residential use, with growth reported in the first quarter of this year.

Most are split heat air pump systems, that can heat spaces in the winter, which Assoclima says can reduce gas consumption as prices spike during the war in Ukraine. That dual-use attracts consumers.

What I don't know is what the total impact will be.