In winter, even in cloudy weather, solar panels continue to produce energy, although, of course, not with the same efficiency as in the hot summer months. I learned more about this when I was planning to buy panels for my motorhome https://a1solarstore.com/blog/solar-panels-for-campers-the-basics.html . Most solar panel owners use them mostly in the summertime, but in some situations you may need to generate electricity in the winter as well. It’s just that in the winter, the electricity generation will be reduced by several times.