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Negative electricity prices registered in nearly all European energy markets
(www.pv-magazine.com)
this post was submitted on 14 Apr 2024
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if electricity is cheap enough, we can use it to collect water back from the air.
Collecting water from the air is not really viable in the parts of the world where lack of water is an issue since humidity is not very high there. You would need to filter huge amounts of air even just to theoretically get enough water, never mind practical concerns like efficiencies of less than 100%.
Dude, even heaters cannot get to 100% efficiency.
...heaters are the one thing that's 100% efficient. And if you want to go even further, look up heat pumps.
I mean, kinda? What sort of heater are we talking about and how do we measure its efficiency? But, if the definition is just converting energy to heat, without specifying where the heat needs to be, then sure. Every heater has 100% efficiency. Otherwise, there will always be a loss at transport and others.