A third of the day is the winter solstice in fairly northerly latitudes. It’s better the rest of the year and the further south you go.
The other thing to remember is that production and storage capacity are cheap to expand, so the better question is how often it’s the case that it’s dark at times of peak demand long enough to exhaust the grid storage capacity. Currently, that’ll be the case but I’d bet that a decade from now it’ll be much less common.
The other thing to remember is that production and storage capacity are cheap to expand, so the better question is how often it’s the case that it’s dark at times of peak demand long enough to exhaust the grid storage capacity. Currently, that’ll be the case but I’d bet that a decade from now it’ll be much less common.