A very large part of the people on this planet have (almost) no winters.

We could start with those ~3 billion people.

Also wind has proven to be a very good supplement to pv.

Those people already use almost no energy compared to everybody else.

Great we should be done relatively quickly then. ;)

Done with what, they don't matter here.

I live in Switzerland and my house currently consumes 35-40kWh of electricity each day. I'm in the process of installing as many panels as possible on my roof and right now in winter, they're forecasted to produce ~18kWh on a good day.

While it'll be possible for me to be more than fully self-sufficient in summer, I'd need roughly 3x more panels to come close to having a chance in winter, plus far more battery storage than is reasonable.

I suspect it might be more doable somewhere with milder winters, like Italy but especially as you go further north and the days get shorter, there's just no chance.

For it to work in places with large seasonal differences, we need something else (e.g. nuclear) and/or storage.

The over build causes these rosey projections about power prices from solar to turn on their heads.

6.5 cents/kWh is pretty good, 65 cents though is terrible.

Actually difference is more than 10:1 too