Why is the concept of pumping water uphill not commonly used as a source of electricity generation, similar to pumped-hydro systems?

They use very low priced power to move the water uphill. Think about $0.05 per KW.. Then when peak power is needed, and the Power Utility is willing to pay $0.45 per KW for that power, they reverse the pumps, and produce electricity. So even if they use 4,000 MW to pump the water uphill at $0.05 per KW, and then get back only 3,000 MW when they generate power at $0.45 per KW, they are making a big profit.

Why not more pumped storage locations? They are actually kinda difficult to find a great pumped hydroelectric place to install them. I can think of a couple of ideal locations. But they are also very expensive to build them. About $1 Billion.

But hydroelectric can have problems too. Lake Shasta in California was down by over 200 feet of water level around 2022. They where not able to make affordable hydroelectric power for a few months. Then the winter of 24 happened, and the lake was filled again.

Hello, I have a question about astral projection. I started to get interested in this a little while after my mum passed in april. I thought I may be able to see her and speak with her if I managed to achieve astral projection. Since this interest, every time i sleep on my back I go into sleep paralysis. However, I cant progress into astral projection because it is very scary for me as I feel like I'm suffocating when this happens. I panic and force myself to wake up. This only ever happened about once a year before this. It sometimes lasts a long time. This has happened about 3 times per week since my mum died, as mentioned on a previous post. I no longer try to go into it anymore(due to the suffocating feeling), but it still happens. I read that sleep paralysis is the pathway to astral projection. Why has this started to happen so frequently since simply taking an interest in it? Is this connected to the afterlife? I am concerned about it as I now cannot seem to stop this happening. Could it be my mum trying to communicate? Im asking due to more knowledge around this in this group.

There are about 4 places where they have large pumped hydroelectric storage in California. A couple more in the TVA power system, one in Missouri that I know of.

Why do this? Because they can get a return of about 80% of the power they used pumping the water uphill. How can that make money?

While pumping the water uphill, they use huge amounts of power, like 475 MW per hour in the TVA project, and similar amounts in other projects. So if you have 4 pumps moving water uphill at 400 MW each, that is like using as much power as my home uses in 1 month in about 40 minutes. I pay about $130 a month, so about $200 a hour to pump the water uphill.

Patti LuPone stuns Broadway as The Apologizer - AV Club

And the hydroelectric generators do not need to be charged to make the power. They rely on rain and snow filling the upper reservoirs and having water to flow downhill into that lake. So basically no fuel cost to run it.