Peaker Plant (Peaking Power Plant)
A power plant that runs only during periods of peak electricity demand. Typically natural gas combustion turbines that can start up quickly but have high per-kWh costs.
Why It Matters
Battery storage is increasingly replacing peaker plants because batteries respond faster (milliseconds vs. minutes), cost less to operate, and produce zero emissions.
Related Terms
Peak Demand
The highest rate of electricity consumption (measured in kW) recorded during a billing period. Commercial customers often pay demand charges based on their peak demand.
Demand Response
A program where utilities pay customers to reduce electricity usage during peak demand events, often by cycling AC units, adjusting thermostats, or discharging batteries to the grid.
Battery Storage
A system that stores excess solar energy for use when the sun isn't shining, providing backup power during outages.