Argentina recorded its highest level of renewable energy curtailment since 2020 during March 2026, with 91,580 MWh of wind and solar generation unable to be injected into the national grid due to transmission constraints. The figure exposes a structural gap between rising generation capacity and the country's high-voltage transport infrastructure.
According to data published by CAMMESA, the Argentine wholesale electricity market operator, March 2026 marked the largest reduction in renewable dispatch since 2020. The 91,580 MWh figure substantially exceeded previous records: 80,716 MWh in November 2023 and 68,300 MWh in November 2024. The trend signals that the problem is intensifying rather than easing as installed renewable capacity continues to grow.
Curtailment occurs when wind or solar parks are technically able to generate electricity but must reduce their output because the transmission network cannot evacuate all the energy available. The phenomenon presents a clear seasonal pattern: solar curtailment dominates in spring and summer, while wind curtailment becomes more prominent in autumn and winter.
Behind the seasonal variation lies a deeper structural issue. The lack of investment in high-voltage transmission infrastructure has emerged as the principal constraint on incorporating new renewable projects into the Sistema Argentino de Interconexión (SADI), the country's interconnected electricity system.
The expansion of renewable generation capacity over the past decade has not been matched by equivalent investments in transmission lines and transformer substations. As a result, the country has accumulated installed renewable capacity that cannot be fully utilised, with energy that could supply industrial demand or be exported regionally being instead curtailed at the source.
During March 2026, the Cuyo region concentrated 65 percent of all undispatched renewable energy, with solar and wind parks in the zone reducing their delivery by 60,207 MWh. Patagonia ranked second with 22,914 MWh of restricted energy, while Buenos Aires province registered 2,531 MWh.
The Cuyo concentration has been consistent across the analysis period. The region also led restrictions during September, November and December 2025, as well as February 2026, consolidating its position as one of the principal congestion points of the national grid.
Patagonia accumulated seven consecutive months as the region with the greatest limitations on delivering energy between March and August 2025, in addition to January 2026, despite hosting some of the world's best wind resources.
The growing restrictions have intensified the long-standing concerns of the principal chambers and business associations linked to the electricity and renewable energy sectors. Entities such as the Cámara Eólica Argentina (CEA), the Cámara Argentina de Energías Renovables (CADER) and the Asociación de Generadores de Energía Eléctrica de la República Argentina (AGEERA) have repeatedly warned that the expansion of generation has not been accompanied by equivalent investment in transmission and transformer infrastructure.
From the sector, the diagnosis is consistent: Argentina has renewable projects ready for development and natural resources of world-class quality, but faces serious difficulties in accessing the SADI due to the saturation of strategic electrical corridors. The critique points both to the lack of execution of transmission works over the past decade and to the absence of agile financing mechanisms that would allow for the expansion of evacuation capacity in regions with strong energy growth potential.
Industry voices coincide that, without new high-voltage transmission lines, Argentina risks failing to capitalise on substantial investments, limiting the integration of clean energy into the matrix, and losing competitiveness against other regional markets.
CAMMESA calculates curtailment from signals registered by the Sistema de Operaciones en Tiempo Real (SOTR), comparing the actual power generated against the potential power output of each renewable park. The potential figure reflects the energy that could be injected into the system considering the available resource (wind or solar radiation) and the operational equipment.
When a difference exists between the two values for reasons external to the generating plant, such as transmission restrictions or operational limitations of the system, the reduced energy is accounted for as curtailment. The methodology provides a standardised measure of unrealised renewable output across the SADI.
The data reflects a paradox at the heart of Argentina's renewable build-out: while the country pursues higher participation of renewable energy and attempts to attract investment for the energy transition, a growing share of that energy is unable to reach consumption centres due to infrastructure gaps.
The March 2026 record places transmission expansion at the centre of the policy and investment agenda. The realisation of the renewable promotion regime extended through 2046, the storage tender programmes such as AlmaGBA and AlmaSADI, and the broader thesis of Argentina as a clean energy and artificial intelligence hub all depend on the capacity of the country to translate generation investment into deliverable power. Without parallel investment in high-voltage transmission, installed capacity continues to grow at a faster rate than the system can absorb.
For investors, developers and policy stakeholders engaged with the Argentine renewable sector, the curtailment data represents both a constraint and a market signal. The constraint limits short-term returns on existing capacity. The signal points to where structural investment, regulatory action, and financing mechanisms will need to converge to unlock the full value of the country's renewable potential.
Sources:
Canal 12, "La falta de infraestructura eléctrica profundiza el desperdicio de energía renovable en Argentina," 21 June 2026.
https://canal12web.com/la-falta-de-infraestructura-electrica-profundiza-el-desperdicio-de-energia-renovable-en-argentina/
Econojournal, "Cuáles son los parques eólicos y solares que redujeron despacho de energía por falta de transporte eléctrico," June 2026.
CAMMESA, monthly grid operation reports, 2026.
