Hydroelectric pumped-storage system

3

2

1

3

The electricity produced is delivered back into the grid. This technology is reliant on topographical features for its deployment

2

During peak demand the energy is recovered by allowing the water to flow back through turbines to produce power

1

Excess or off-peak power is used to pump water from a lower reservoir to an upper reservoir, usually up a mountain

Powerplant

and turbines

Low-level

loch or basin

High-level

reservoir

3

3

The electricity produced is delivered back into the grid. This technology is reliant on topographical features for its deployment

2

During peak demand the energy is recovered by allowing the water to flow back through turbines to produce power

1

Excess or off-peak power is used to pump water from a lower reservoir to an upper reservoir, usually up a mountain

2

1

Powerplant

and turbines

Low-level

loch or basin

High-level

reservoir