EUC approves 8‑MW solar PPA and a deal to reserve home battery capacity with Base Power
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Summary
The Electric Utility Commission authorized negotiating an 8‑MW PPA for a city‑hosted landfill site and approved an agreement with Base Power to reserve capacity from home batteries for grid services; both items passed by voice vote.
The Austin Electric Utility Commission on April 13 approved two procurement items intended to expand local renewable generation and distributed energy storage.
Solar PPA: Commissioners authorized negotiating and executing an agreement with U Power to procure 8 megawatts from a utility‑scale solar site sited on city‑owned landfill property. Pat Sweeney, interim vice president for energy and market operations, said the site is a direct PPA (not part of the community solar program) and is expected to be operational roughly two years after contract execution. Sweeney said the host department is Austin Resource Recovery and staff are negotiating fair compensation for use of the site.
Home battery arrangement (Base Power): Commissioners also recommended approval of an arrangement with Base Power that would have Base install and own home battery systems while Austin Energy purchases reserved capacity for grid uses. Staff described the construct as a capacity reservation: customers who opt in enter a contract with Base Power to install a backup battery and pay for that customer‑facing agreement; Austin Energy pays Base for the portion it reserves and has dispatch control over the reserved capacity for grid services such as reducing 4CP exposure or providing ancillary services. Tim Harvey (director of customer renewable solutions) and other staff said the customers would continue to be billed by Austin Energy for energy used during backup events and that customers retain value‑of‑solar credits in typical solar‑plus‑battery configurations.
Commissioners asked several operational questions — who dispatches batteries, how frequently they can cycle, whether customers can charge batteries from rooftop solar during outages, and how the reservation payments are structured. Staff said the agreement reserves a significant portion of each battery for Austin Energy subject to operational constraints and that detailed dispatch/cycling rules are part of negotiated contracts rather than the EUC’s authorization.
Vote and next steps: Both items were approved by voice vote during the meeting. Commissioners requested follow‑up materials on land‑use compensation for the PPA site and more detail on customer terms for the Base Power program before the contract finalization.
Why it matters: The PPA adds utility‑scale solar capacity on city land without using the community solar enrollment pathway; the Base Power arrangement is a new model to scale distributed battery capacity for grid services while enabling customer backup. Both moves reflect Austin Energy’s strategy to increase local clean energy and storage options without obligating large, immediate capital outlays by the utility.
