Definition
A peaker plant, or "peaker," is a power station that runs only during periods of peak electricity demand, the hot summer afternoons when air conditioning surges, or the early-evening ramp when households switch on lights and ovens. Unlike baseload generators that run continuously, peakers sit idle most of the time and fire up for just a few hours, often operating fewer than 1,500 hours per year and sometimes as few as 250. Their defining trait is speed: they can start and reach full output quickly to plug short, sharp gaps between supply and demand.
Fast but costly
That responsiveness comes at a price. Peakers are typically natural-gas combustion turbines or reciprocating engines that are relatively inefficient and expensive to run per unit of electricity. Because they operate so rarely, their fixed construction cost is spread over very few hours, making the electricity they produce some of the priciest on the grid. They exist not because they're cheap, but because the grid must meet every peak in real time, and the cost of a blackout dwarfs the cost of an idle turbine.
The mining opportunity
Peaker economics are dismal precisely because of their low capacity factor, a multi-million-dollar asset earning revenue only a handful of hours a year. A co-located Bitcoin miner can monetize that otherwise-idle generation capacity during off-peak hours, then instantly curtail its load when the grid needs the turbine for a demand spike. This turns a single-purpose peaker into a dual-revenue asset and makes the miner a flexible grid-balancing partner rather than just another load.
This interruptible-load model is central to how mining integrates with grids. See also grid interconnection.
In Simple Terms
A peaker plant, or “peaker,” is a power station that runs only during periods of peak electricity demand, the hot summer afternoons when air conditioning…