We practically don't see the sun in northern Europe during winter. And yes, the wind might not blow either.
I consider 2 weeks of supply a bare minimum.
How would 2 weeks of battery help you in that situation? The winter lasts a lot longer than 2 weeks. So after 2 weeks of no sun, wouldn't you be just as screwed as if you had 1 week of battery storage?
How would 2 weeks of battery help you in that situation? The winter lasts a lot longer than 2 weeks. So after 2 weeks of no sun, wouldn't you be just as screwed as if you had 1 week of battery storage?