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Home electricity bills are skyrocketing. For data centers, not so much.
(yaleclimateconnections.org)
This is a most excellent place for technology news and articles.
Since a lot of people live in rented flats, the 800w these so called "balcony solar plants" can cover your base load, thus reducing your electric bill. Of course they can't support whatever setup you seem to have where 108m2 of solar can't cover it