50m2 Solar on the roof top of every household would power An average western country. That is not a lot. And that is is an upper band as we have wind power, biomass, hydro power geothermal and many other sources of clean energy.
Offshore wind is getting really cheap and offers vast amount of unused space.
As I mentioned we got tons of other options besides solar power.
EVs are now increasingly beating gasoline cars on cost of ownership and these often have batteries large enough to store the power required for 4 days of a regular western household.
I doubt you will be entirely without sunshine for 4 days straight.
