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For a typical house in my parts (Finland), it would be 230V and 3 x 25A fuses, so maximum power draw is 17kW.

Most houses would be able to upgrade to 35A without extensive reworking of cables, getting to a 24kW maximum.

Also 50A and 63A are available for consumers in most locations, but would require re-evaluating the cabling coming to the house.

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At least in Slovenia, many new-ish houses also have a 3-phase outlet or two. I don't know what the maximum wattage of those is, but I do know it's a lot --- and on a single outlet.

Many houses here have those as well. The outlets in question are rated for 3 x 230V x 16A, about 11kW.

I'm guessing it would be the same in Slovenia.

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