> It's much better to massively over-provision the solar so you have enough energy - on average - for the winter. Keep in mind that the UK is really far north,

> It's much better to massively over-provision the solar so you have enough energy - on average - for the winter. Keep in mind that the UK is really far north, much farther north than most people expect, really, and the nights are really long in winter (there's up to 16 hours of night in London in December). And even your daylight hours aren't going to be sunny in average So you'd have to over-provision a lot (like 10 or twenty times).