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ERCOT officials describe ADER pilot growth and technical hurdles
Summary
ERCOT staff told the committee the ADER pilot started in 2023 and has grown to about 120 MW of aggregated residential batteries; ERCOT stressed the need for accurate modeling, telemetry and distribution planning before scaling to several hundred megawatts.
ERCOT managers and consumer counsel described how aggregated distributed energy resources (ADER) are being tested as virtual power plants that can provide grid services.
Ryan King, manager of market design at ERCOT, said the pilot began in 2023 and has rapidly expanded. "This pilot began in, 2023 and, we're now at a point where we have a 120 megawatts of participation in this pilot," he said, adding ERCOT currently allows a 500 MW pilot limit and is evaluating modeling, telemetry and distribution impacts before broadening participation.
Ben Barclay of the Office of Public Utility Counsel said ADERs and microgrids can improve resiliency and lower costs for residential and small commercial customers, but warned that interconnection and interconnection‑cost allocation must not shift undue costs to small consumers.
ERCOT witnesses and committee members discussed eligibility for future reliability products and the need to integrate batteries, EVs and other DERs carefully into market rules so they complement—not harm—local distribution reliability.
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