Duke Energy Progress, LLC v. Federal Energy Regulatory Commission, No. 20-1495 (D.C. Cir. 2022)
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Duke generates electricity for Power, a “joint agency” of 32 North Carolina municipalities. Power pays Duke an Energy Charge that “reimburses Duke only for its fuel costs and variable operations and maintenance costs associated with producing the energy consumed by Power" and a Capacity Charge, designed to cover Duke’s fixed costs and provide a return on its infrastructure investments, calculated by determining its pro-rata share of the demand on Duke’s system during a one-hour “snapshot” of system usage taken during the peak hour on Duke’s system each month.
Their agreement regulates activities Power may employ to modify its electricity use, including Demand-Side Management and Demand Response. Demand-Side Management involves end-users accepting an inducement to sign up for a program where Power can turn off and on their appliances around high-demand periods. Demand Response involves a supplier providing end-users information on the price of energy at a given time and those end users then modifying their consumption to avoid elevated prices.
In 2019, Power petitioned the Federal Energy Regulatory Commission (FERC) arguing that the provisions that permit Demand-Side Management and Demand Response activities permit deploying battery storage technology to reduce metered demand during peak load periods and drawing from those batteries during the high-demand “snapshot” hour. Concerned that Power would reduce its Capacity Charge to zero, Duke opposed the petition. The D.C. Circuit affirmed FERC’s grant of Power’s petition, finding that the agreement permits Power to use battery storage technology as either Demand-Side Management or Demand Response.
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