To make solar power viable, we need a solution for overnight energy storage.
Batteries are complicated.
Do you know what isn't? Water go up. 
this post was submitted on 29 Sep 2024
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Of course not all of the energy used to power the pump is lost (that's the whole idea) but there is still some energy loss. Maybe it's only a small amount like you say with the turbine but that's what I was referring to.
Yeah, I see what you mean.