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by Animats 796 days ago
Split transformers for power transmission exist, but are rare. Here's a 3 KW system used for non-contact charging of electric forklifts, industrial mobile robots, and such.[1] 93% efficiency claimed. Probably not worth the trouble just to get power through a window.

[1] https://www.wiferion.com/us/

1 comments

Witricity is trying to do the same with electric cars.