Explainer: Why are energy prices sometimes negative?
There are a lot of factors involved, but they boil down to a simple economic concept: surplus.
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- hydro, solar, wholesale prices, wind
wholesale prices
ISO-NE fact sheet, webpage offer help understanding electricity prices
Electric bills reflect a mix of factors, including fuel prices, weather, infrastructure needs, and public policy decisions.
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Summer 2025 recap: Reliability maintained as grid sees highest peak in over a decade
New Englanders consumed about 3% less total electricity in June, July, and August than during the same period in 2024.
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- summer, system operations, wholesale prices
Reserve price graph shows data during rare power grid conditions
The Real-Time Reserve Price Graph is active only when resources reduce or stop electricity production in order to satisfy reserve requirements instead.
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- website, wholesale prices
Five-Minute Real-Time LMP Graph captures variability of wholesale electricity prices
Part of the ISO Express dashboard, the chart continuously updates throughout the operating day.
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Hourly LMP Graph tracks wholesale prices
Part of the ISO Express dashboard, the chart reflects day-ahead and real-time energy prices as well as the strike price for ancillary services.
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Price Map shows wholesale energy markets in action
Here’s a breakdown of one of the most prominent features of the iso-ne.com homepage.
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- website, wholesale prices
Winter 2024/2025 recap: Region’s grid remains reliable, though cold weather drives up wholesale electricity prices
It was the first winter in a decade with colder-than-normal temperatures.
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- system operations, wholesale prices, winter
Monthly wholesale electricity prices and demand in New England, February 2025
Prices were up year over year in both the day-ahead and real-time markets, driven primarily by higher demand.
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- monthly prices, natural gas, wholesale markets, wholesale prices
Monthly wholesale electricity prices and demand in New England, January 2025
Prices were up in both the day-ahead and real-time energy markets in January.
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- monthly prices, natural gas, wholesale prices