Chile Reaches 4,597 MW Of Energy Storage Capacity Under Construction, Accelerating Grid Decarbonization

SANTIAGO - Chile has reached a milestone in its energy transition, with 38 battery energy storage systems (BESS) currently under construction across the country, representing a combined power capacity of 4,597 MW and an energy capacity of 18,780 MWh, according to the latest report from the Ministry of Energy's Construction and Investment Projects in the Energy Sector, published in March 2026.

The figures, which reflect the sector's growth as of the first quarter of 2026, underscore Chile's rapid acceleration in deploying grid-scale storage technologies - a critical component in managing the country's increasingly renewable-heavy electricity system. According to ministry data, total investment in the 38 projects under construction amounts to approximately US$4.076 billion.

In a development that has surprised even optimistic industry forecasts, Chile officially reached its 2030 target of 2,000 MW of installed BESS capacity on March 31, 2026 - fully four years ahead of schedule. The goal was achieved with the commissioning of two hybrid projects: Víctor Jara (solar plus BESS) and BESS Andes III (solar plus storage), according to the Ministry of Energy.

With the current pipeline of projects under construction, the country is now on track to meet its 2050 target of 6,000 MW of installed BESS capacity as soon as early 2027 - more than two decades ahead of the original timeline, the ministry said.

The achievement reflects a combination of maturing regulation - including the landmark 2016 Law 20.936 and 2022 Law 21.505 (Storage and Electric Vehicles Law), which established independent storage systems' ability to participate in wholesale markets - as well as falling battery costs and growing private sector confidence in Chile's energy transition roadmap.

The construction activity is heavily concentrated in Chile's mineral-rich northern regions, where solar irradiance is among the highest in the world and mining operations represent a significant source of electricity demand. The Antofagasta region, home to the country's copper heartland, accounts for the largest share under construction, with 2,140 MW of BESS capacity currently being deployed.

The Atacama region follows with 1,144 MW under construction, while Tarapacá adds 778 MW. The southern regions of Maule (303 MW), Coquimbo (110 MW) and Arica-Parinacota (64 MW) round out the remaining activity, according to ministry data.

The largest projects in the pipeline are hybrid facilities combining renewable generation with lithium-ion battery storage. Among the most significant are BESS Cristales - 400 MW of solar generation paired with 340 MW/1,360 MWh of storage - and Pampas, a 348 MW hybrid facility also featuring 340 MW/1,360 MWh of battery capacity.

Beyond the projects currently under construction, an additional 13 storage systems are in the testing and commissioning phase, representing a combined capacity of 2,119 MW/9,708 MWh. These systems are concentrated primarily in Antofagasta (1,504 MW), with additional capacity in Arica-Parinacota (258 MW), the Metropolitan Region (199 MW), Tarapacá (98 MW) and Atacama (46 MW).

The volume of projects moving from construction into testing - and from testing into commercial operation - is expected to accelerate significantly through the remainder of 2026 and into 2027.

Major international infrastructure players are mobilizing substantial capital into Chile's storage sector. In April 2026, Copenhagen Infrastructure Partners (CIP) issued a Final Notice to Proceed for its 300 MW/1,500 MWh Patache battery storage project, located near Iquique in the Tarapacá region. The project, managed through CIP's Growth Markets Fund II, is designed to shift excess daytime solar generation to higher-demand evening hours, reducing reliance on thermal generation and cutting CO₂ emissions.

Patache builds on lessons from CIP's Arena BESS project - a 220 MW/1,100 MWh system in the Antofagasta region - which has already completed construction and is delivering electricity to the national grid, the company said.

Meanwhile, Spanish renewable energy developer Grenergy is advancing its Central Oasis solar-storage platform - planned to become one of the largest hybrid systems in the region, with 1.1 GW of solar capacity and 4 GWh of storage. Total investment is estimated at US$900 million, with operations expected between 2026 and 2027. In March 2026, Grenergy announced a strategic partnership with BYD Energy Storage to supply 2.6 GWh of battery storage systems for the platform, deploying 468 MC Cube T batteries featuring Blade Battery technology.

The surge in storage deployment is supported by an increasingly sophisticated regulatory framework. Chile's new administration under President José Antonio Kast has prioritized batteries and energy storage as pillars of its energy security strategy, with guidelines released in March 2026 aiming to accelerate investment in renewable energy, expand storage systems and modernize electricity grid infrastructure.

Key regulatory updates, including the ongoing review of decrees DS125 (system operation and storage development) and DS88 (PMGD distributed generation regime), are expected to provide additional legal certainty for investors and further reduce barriers to hybridization and grid integration.

The investment pipeline extends beyond the 38 projects currently under way. A broader portfolio of 42 energy projects valued at US$16.3 billion - recently unlocked through a coordinated effort by the Ministry of Energy, the National Energy Commission (CNE) and other government agencies - includes storage as the second-largest category, accounting for approximately 34 percent of total investment.

The National Electrical Coordinator has previously estimated that initial investment in storage alone could reach around US$3.16 billion by 2026, a figure that is now being surpassed by ongoing construction activity.

Chile's aggressive storage deployment is not an abstract policy choice - it is a technical necessity. The country's renewable energy generation, which accounts for approximately 70 percent of installed generating capacity, faces structural challenges. Most renewable generation is concentrated in the northern desert regions, while the majority of demand is located in the central metropolitan area around Santiago. This geographical imbalance, combined with the inherent variability of solar and wind resources, has resulted in rising levels of curtailment - the intentional reduction of renewable generation when supply exceeds transmission or demand capacity.

In 2025, renewable curtailments reached 5 TWh, representing approximately 15 percent of available wind and solar generation, according to industry data. Without intervention, energy losses from curtailment were projected to escalate further by 2026. Chile's energy ministry has recognized this imperative, with Energy Minister Ximena Rincón calling for continued investment in enabling infrastructure - particularly storage and transmission - as the foundation for further renewable energy growth at the RE+ Southern Cone Summit in Santiago.

Chinese companies have become significant players in Chile's storage sector. Beyond BYD's collaboration with Grenergy, leading Chinese manufacturers including CATL, Sungrow Power Supply, Tianhe Energy Storage, Huawei, Kelu Electronics, CSI Solar, Ampace and JinkoSolar have all established a presence in the Chilean market, according to industry reports. Sungrow and BYD have each secured GWh-level storage orders in Chile in recent months, highlighting the growing depth of bilateral cooperation in clean energy.

The convergence of supportive policy, abundant renewable resources, growing international investment and maturing technology has positioned Chile as one of the world's fastest-growing energy storage markets. With 4,597 MW already under construction and more projects in the pipeline, the country is well on its way to solidifying its role as a regional leader - and a global laboratory - for grid-scale energy storage deployment.