Self-Sufficient Hydroelectric Power Facility

The upper (Reservoir 1) is filled with water pumped from a well using solar and / or wind power.

When the upper (Reservoir 1) is full of water, the solar and wind power can be used to run the pumps to re-circulate the water within the system.

When the upper (Reservoir 1) is full of water, the solar / wind pumps could be used to pump water to a nearby water treatment facility instead of being used to power the pump storage pumps.

Water flows from upper (Reservoir 1) through a turbine into lower (Reservoir 2).

Water from lower (Reservoir 2) is re-circulated to upper (Reservoir 1) using wind / solar powered pumps.

Before re-circulating back into upper (Reservoir 1) the pumped water flows over a overshot water-wheel producing a extra souce of energy to power the pumps, facility or to be sent into the grid.

"Since hydropower is so reliable, hydro plants can actually adjust the flow of water. This allows the plant to produce more energy when it is required or reduce the energy output when it is not needed. This is something that no other renewable energy source can do."
https://www.greengeeks.com/blog/hydroelectric-energy/