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Prices soar by 22% at the largest US grid energy auction

According to the results of PJM Interconnection's annual energy auction, which was held by the U.S.'s largest grid operator, prices cleared at $329.17 per megawatt-day. This is 22% more than the record high levels set last year.

The recent increase in U.S. electricity consumption, driven by Big Tech data centers' demand, has collided with a decade-long decline in power supply in PJM. This has led to a shortage of power that has pushed prices at the capacity auctions to new highs.

PJM’s capacity auction will determine what owners of power plants in the grid that serves one out of five Americans are paid in order to ensure that they can pump out electricity at times of high demand. These days tend to be the hottest and coldest of the year.

The news of the auction results boosted shares in major power producing companies within PJM. Talen Energy shares rose over 9% in the trading after bell, Constellation Energy shares increased over 5%, and NRG Energy shares increased over 6%.

The payments represent the balance between energy supply and demand on the grid. This grid spans 13 States and the District of Columbia. Higher prices are usually an incentive to developers to build new power plants.

PJM's area includes the largest concentration of energy-intensive data centres in the world, located in "Data Center Alley", a part of Northern Virginia. Other hubs are also emerging that need massive amounts of power faster than the power plants can connect to the grid.

Data center demand pushed up the price of auctions by nearly nine times, to $269.92/megawatt-day.

These high payment prices, ultimately paid by the public themselves, drew a reaction from consumer groups, politicians, and environmental organizations, which led to several changes within PJM.

The auction cleared 45% of the capacity for natural gas, 21% coal, 22% nuclear, 4% wind, 3% solar, and 4% hydro. Reporting by Laila KEARNEY in New York, and Noel John from Bengaluru. Editing by Aurora Ellis.

(source: Reuters)