Mexico’s Energy Ministry (Sener) has extended the registration deadline for standalone battery energy storage projects to March 1, 2027, under a national call covering a reference capacity of 935 MW. The fourth amendment to the Call for Strategic Electricity Generation and Storage Projects was published in the country’s Official Gazette (DOF) on Oct. 29.
The resolution, signed by Energy Minister Luz Elena González Escobar, moves the deadline for submitting expressions of interest and connection study requests for electricity storage systems (SAEE) from Oct. 30, 2026, to March 1, 2027. The registration period began on June 2, 2026.
The amendment also clarifies that procedural deadlines must be calculated in working days unless otherwise specified.
Sener said the extension is intended to attract more viable proposals, strengthen technical assessments by energy authorities, reduce costs for project developers and improve administrative efficiency. It does not change the required storage capacity or introduce new technical requirements.
The previous, third amendment, issued in September, had established separate schedules for generation and storage projects. Registration for renewable generation projects closed on Sept. 2, while the storage registration deadline was extended to Oct. 30. The latest extension applies only to storage.
The call sets a reference requirement of 935 MW of standalone storage, with three-hour duration systems representing 2,805 MWh of energy capacity. The regional allocation is:
- 245 MW for the Northern Regional Control Management area
- 180 MW for the Eastern area
- 160 MW for the Northwest area
- 140 MW for Baja California
- 140 MW for the Peninsular area
- 50 MW for Baja California Sur
- 20 MW for the Western area
The regional capacity figures are indicative rather than strict limits on proposals. Mexico’s National Energy Control Center (Cenace) must assess storage requirements in each region and exclude projects in areas where those needs are already covered.
The evaluation criteria include each project’s contribution to system reliability, congestion relief, capacity provision and operational flexibility. Projects scheduled to enter commercial operation before 2030 will receive priority.
The call, initially published in May, establishes a priority process for projects that could be developed through partnerships with state-owned utility Comisión Federal de Electricidad (CFE). Developers must complete the relevant technical assessments and permitting procedures and secure the necessary contracts. The extended registration period does not guarantee that submitted projects will be approved or awarded capacity.
From pv magazine Mexico
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