Book 22, Question 114
How Does Pumped Storage Work Like a Giant Water Battery?
Imagine a giant battery made of water. It uses two lakes, one high and one low. That is pumped storage! Some pumped storage plants can run for many hours at a time.
More fun facts
- A pumped storage plant pumps water uphill into a reservoir.
- When electricity is needed, the water flows back down through turbines to make power.
- These plants usually use more electricity to pump the water up than they make when it flows down.
- In 2025, the US had pumped storage plants in 18 states.
- Other hydropower plants also store water in reservoirs behind dams and release it when needed.
Sources: eia.gov
Questions kids ask
Where does the water wait?
It waits in a reservoir that sits higher up than the turbines.