The Compañía Administradora del Mercado Mayorista Eléctrico (CAMMESA) received eight renewable energy projects in the current annual call of the Renewable Energy Term Market (MATER), corresponding to the fourth quarter of 2025.
Together, the initiatives total 737.9 MW of installed capacity and have applied for priority dispatch. However, the minimum capacity requested amounts to 551 MW, while the maximum rises to 635 MW.
The eight projects are split between five solar PV plants (544 MW) and three wind projects (193.9 MW). The photovoltaic initiatives are located in Buenos Aires, Corrientes, Formosa, Catamarca and San Juan, and jointly request a minimum of 529 MW.
Meanwhile, the three wind farms are competing exclusively in Buenos Aires Province, with requested capacities ranging from 22 MW to 91 MW, within the Patagonia–Buenos Aires (PBA) corridor.
However, the technical scenario is complex. The electricity transmission system imposes significant constraints for this call, as only 50 MW have full availability to inject power without restrictions, all of them located in the Misiones–NEA–Litoral corridor, according to Annexe III published by CAMMESA.
As a result, only two projects are competing under Full MATER conditions, meaning effective and immediate priority dispatch:
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PS Aluar Abasto (24 MW), developed by Aluar, one of the country’s largest aluminium producers
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PS El Sol de V.G. Güemes (30 MW), promoted by Ambiente y Energía, a company planning to deploy 400 MW of solar capacity between 2026 and 2027
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The rest of the requested capacity falls under Referential Allocation “A”, a scheme that allows for up to 8% curtailment until the necessary transmission infrastructure is enabled. Available capacity under this modality is distributed as follows:
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Patagonia – Buenos Aires: 190 MW available + an additional 200 MW if projects are solar.
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Centre – Cuyo – NOA: only 32 MW awardable, exclusively for wind technology.
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Misiones – NEA – Litoral: up to 475 MW with potential priority dispatch, although only 50 MW are considered unrestricted.
MATER 360: infrastructure works under analysis
Among the submitted projects, two solar parks stand out for including associated transmission infrastructure works and/or energy storage systems under the MATER 360 scheme. Both initiatives belong to Genneia, with a combined capacity of 450 MW, and are located in the Centre – Cuyo – Northwest Argentina corridor:
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PS Sol del Valle (300 MW): includes Malvinas 132 kV shunt compensation, replacement of the series capacitor at the Recreo substation, and expansion of the La Rioja Sur 132/500 kV transformation capacity.
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PS Tocota III (150 MW): includes upgrades at the Bauchaceta substation, normalisation of the Calingasta–Rodeo transmission line, and the incorporation of a BESS (Battery Energy Storage System).
In this way, the country’s largest renewable power generator repeats a strategy used in previous calls, adding energy storage projects, transmission works and supply to large consumers such as data centres to its portfolio of more than 1,500 MW.
The CAMMESA call closed on 16 January, and attention is now focused on potential tie-break decisions. On 13 February, the awarded projects are expected to be officially announced.
