On: Australia has so much solar that it's offering everyone free electricity

[energy123]

A second solution is to overbuild so you have enough even in winter. Easier to do near the equator.

A third solution is to pipe it across timezones using HVDC and accept some level of efficiency loss and some geopolitical risks.

A fourth solution is to mix lots of wind, which performs better in winter and cancels out the lower insolation.

Realistically it's going to be all of the above, with the balance determined by local factors.

[Manabu-eo → energy123]

Related to overbuilding, vertically mounted solar panels can help flatten the generation curve during the day, and may perform better than "optimally tilted" panels on winter, especially where snow might otherwise be a problem.