More than 550 MW are vying for space in the MATER despite capacity restrictions

The Wholesale Electricity Market Management Company ( CAMMEA ) received eight renewable energy projects in the current call for bids for the Renewable Energy Term Market (MATER) , corresponding to the fourth quarter of 2025. The initiatives, totaling 737.9 MW of power , are requesting dispatch priority, although the minimum capacity requested by the projects is 551 MW , while the maximum reaches 635 MW. The eight projects are distributed as follows: five solar (544 MW) and three wind (193.9 MW) . The photovoltaic initiatives are located in Buenos Aires, Corrientes, Formosa, Catamarca, and San Juan , and request a combined minimum of 529 MW . Meanwhile, the three wind farms are competing exclusively in the province of Buenos Aires , with requested capacities ranging from 22 to 91 MW , within the Patagonia-Buenos Aires Province corridor. However, the technical scenario is complex: The electricity transmission system imposes serious limitations on this call for bids, as only 50 MW are fully available to inject energy without restrictions , located exclusively in the Misiones NEA Litoral corridor, according to Annex III published by CAMMEA. Therefore, only two projects compete under the MATER Pleno , meaning with effective and immediate dispatch priority:

• PS Aluar Abasto (24 MW) , from the company Aluar , one of the largest aluminum producers in the country
• PS El Sol de VG Güemes (30 MW) , promoted by the firm Ambiente y Energía , which has a projection of 400 MW of solar power between 2026 and 2027

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The remaining requested capacity is subject to the Reference "A" allocation modality, a scheme that implies the possibility of up to 8% curtailment (generation limitation) until the necessary infrastructure works are enabled , distributed as follows.

• Patagonia Buenos Aires : 190 MW available + an additional 200 MW if the projects are solar.
• Cuyo NOA Center : only 32 MW can be awarded, exclusively for wind technology.
• NEA Litoral Missions : up to 475 MW with the possibility of priority without limitations, although only 50 MW of them are considered without restrictions.

MATER 360: Infrastructure works under analysis Among the projects presented, two solar parks stand out that include works associated with transmission infrastructure and/or energy storage systems, under the MATER 360 scheme.

Both initiatives belong to the firm

Genneia with a combined capacity of 450 MW, located in the Central Cuyo Northwest Argentine corridor:

• PS Sol del Valle (300 MW) : includes the Malvinas 132 kV Shunt compensation , the replacement of the series capacitor at the Recreo substation , and the expansion of the transformation at the La Rioja Sur 132/500 kV substation .
• PS Tocota III (150 MW) : encompasses the adaptation of the Bauchaceta ET , the normalization of the Calingasta Rodeo LAT and the incorporation of a BESS (Battery Energy Storage System) .

Thus, the country's largest renewable energy generator is repeating the strategy it has implemented in previous calls for bids , adding storage projects, electricity transmission infrastructure, and supply infrastructure for large consumers such as data centers to its portfolio of over 1,500 MW. CAMMEA's call for bids closed on January 16 , and the resolution of any ties is now pending so that the awarded projects can be announced on February 13.