1. Taking Aim at PJM’s 10-Hour Duration Capacity Rule for Energy Storage

    Taking Aim at PJM’s 10-Hour Duration Capacity Rule for Energy Storage

    The U.S. energy storage industry has been getting into arguments with grid operators over their plans to implement FERC Order 841, the mandate to integrate energy storage assets into the country’s wholesale energy markets. The biggest argument to date has been over PJM’s insistence on a 10-hour duration requirement for its capacity market. Last week, ESA and NRDC unveiled an analysis by Astrapé Consulting, using PJM data and industry-standard modeling, that indicates gigawatts' worth of energy storage in 2-hour, 4-hour and 6-hour durations could provide the same capacity value as power plants that run 24 hours a day.

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