6 hours of daylight, then you need to over-provision the solar so you can charge 18 hours worth of batteries in that time. This is still cost competitive with nuclear
Basically if we are lucky we hit 5% of a typical summer day for an hour maybe two. As the days are less then half as long you end up with ~1% the production vs summer.
But in reverse the panels are really good during the summer as the days are very long. This is why people bother installing solar here.
