I wish these guys, or someone would get beyond the 'call us for pricing' vaporware stage and actually start selling to retail customers: https://www.watergen.com/home-office/
which is maybe 1€ per liter drinking water for my area
The tech is cool but not really new or a solution to all water problems, the energy cost is relatively high.
More about it here: https://www.youtube.com/watch?v=EGTRX6pZSns
Taking 400W *24/7 is quite a lot of energy, and I'm not really believing the 4-8L output.
At 17° Celsius and 38% humidity, you get 0.008g of water out of 1L of air. There are physical limits to this, of course.
The dude in the video does the calculations, and it's far from "no problem to make water out of air". It would be better to use the energy for something else.
If it was so easy to do, there would be no problems with water shortages around the globe (and soon maybe "water wars") just take it out of the air with solar.
I run a dehumidifier in my British house(in the conservatory) and it easily fills up its 10L tank every 2 days. Also indicentally it does use 400Wh(which yes, is a lot of energy).