- Once the leading renewable energy source, more hydroelectric dams are being used to store excess solar and wind energy.
- The Kaprun hydroelectric station in the Austrian Alps was one of the first dams converted into a storage facility.
- These facilities use excess solar/wind energy to pump water uphill, store it, then release it downhill at a later date for usage (click Bloomberg to see visual).
- Lithium-ion battery life limits have made hydro storage the best large-scale renewable energy storage.
