BESS - ContourGlobal

Storage (BESS) Projects

Driving the Transition Globally

Battery storage is becoming a defining technology of the energy transition. Transforming renewables from variable generation into stable, dispatchable power, while reducing curtailment and enabling greater grid flexibility, storage is playing more and more a critical role. As the global energy landscape shifts toward sustainability, ContourGlobal is at the forefront of this transition.

With an innovative strategy, the company surpassed 3 GWh of operational Battery Energy Storage System (BESS) projects in Europe and Americas.

ContourGlobal’s strategy in markets with favorable competitive conditions is to harness the potential of advanced storage technologies to maximize the value of renewable generation by making it available outside peak production hours. The company’s strategy also involves exploring the potential to develop battery energy storage systems alongside its existing facilities, making use of available land and established grid connections to maximize efficiency and value.

The deployment of hybrid and stand alone BESS systems is key part of ContourGlobal’s strategy making it a primary partner for power-hungry digital infrastructures like data centers and hyperscale utilities. The hybridization approach applies both to thermal generation assets and renewable facilities.

Our Projects Around the World

Chile: Giga-scale projects with “Sun at Night” Hybrid Model

In Chile, we are pioneering hybrid models that combine large-scale solar generation with high-capacity, long-duration energy storage. Quillagua plant is already fully operational, forming a 221 MWp photovoltaic complex equipped with a 1.2 GWh battery storage system. This advanced system enables the delivery of 200 MW of clean energy for up to 6.2 hours after sunset, making Quillagua the largest solar plant with storage in Latin America. The project operates under a long-term overnight purchase agreement (PPA), ensuring the reliable supply of renewable energy at night.

At the same time, Victor Jara project (231 MWp PV + 1.3 GWh BESS) has reached COD in March 2026, and, together with Quillagua, will form one of the world’s most advanced hybrid energy complexes in Chile’s Atacama Desert. These facilities will enable continuous energy delivery for up to 6.5 hours after sunset under the innovative “Sun at Night” model and PPA.

Discover our assets in Chile

400

of Power Capacity

6.5

Hours

of duration

Bulgaria: one of the country's largest BESS project

In the industrial perimeter of the ContourGlobal Maritsa East 3 thermal power plant, we have commissioned one of the country’s largest standalone battery storage systems. Reusing the grid connection of the former Coal Units 1 and 2, the company deployed a 500 MWh stand-alone BESS that is now in operation. On the same site, construction is set to begin on additional hybrid renewable projects, including PV systems integrated with batteries.

Discover our assets in Bulgaria

202

of Power Capacity

2.5

Hours

of duration

United States: Scaling Up Renewable-Hybrid Projects

In the United States, ContourGlobal is expanding its hybrid renewable portfolio with a major solar-plus-storage project in the western region, strategically located near the Arizona-California border. The project will be built in two phases, with a combined capacity of 509 MWp of solar PV and 360 MW / 1.4 GWh of Battery Energy Storage Systems (BESS), reaching a total of 869 MW of hybrid capacity once fully operational.

The BESS component is designed to deliver 360 MW of storage for up to four hours, enabling the project to supply clean energy during evening peak demand periods when renewable availability typically declines. This extended-duration storage solution enhances system flexibility and reliability, addressing the growing imbalance between daytime solar oversupply and evening carbon-free energy shortage

Discovers our assets in USA

360

of Power Capacity

Hours

of duration

Italy: Strengthening Grid Resilience with very large portfolio acquisition

We’ve significantly expanded our presence in Italy by acquiring two major BESS portfolios for a total of over 1.6 GW of capacity, with storage durations of up to eight hours. These geographically diversified projects position us as a key player in Italy’s energy storage landscape, helping to accelerate the phase-out of fossil fuels. Once fully developed, the portfolio could reach a total energy storage capacity of nearly 9.5 GWh.

Discover our assets in Italy

1.6

of Power Capacity

Hours

of duration

UK: supporting grid stability and reducing clean energy curtailment

ContourGlobal entry in the UK market through the acquisition of a 500 MW / 2,000 MWh battery energy storage project, 4 hours of continuous discharge, has marked a significant milestone in ContourGlobal’s european expansion.

The facility is designed to charge during periods of excess renewable generation and discharge when the system needs flexibility and represents one of the largest BESS developments in the UK where the abundance of renewable power, cooler climate and interest in digital infrastructure attracts more power-intensive sectors, including data center developers, make the Wallace project play an important role in supporting grid stability and reducing clean energy curtailment.

Discover our asset in Scotland

500

of Power Capacity

Hours

of duration

Greece: growing with PV and BESS

ContourGlobal has entered in the Greek market in January 2026, with the acquisition of 37 MWp operational solar PV portfolio and 500 MW / 2,000 MWh of battery energy storage systems (BESS) in mature state of development.

The BESS projects come from 2 transactions. The first one, is a 100 MW / 400 MWh ready-to-build facility in Thessaly with 4 hours of duration. Construction starts Q1 2026 and operations by early 2027. It will be one of Greece’s first merchant BESS.

The second one includes up to 400 MW / 1,600 MWh of additional BESS projects in advanced stage of development, eligible under Greece’s Priority Regime for Battery Storage, fast-tracking up to 4.7 GW of standalone storage.

Discovers our assets in Greece