en.Wedoany.com Reported - On July 14, 2026, the National System Operator (Pvt.) Ltd., under the Ministry of Energy of Sri Lanka, issued an international tender for a 250 MW / 1000 MWh battery energy storage system (BESS), with a bid submission deadline of August 14, 2026, at 10:00. Tender documents are available until August 13, 2026, at 10:00.

This project aims to provide opportunities for global and local developers to participate in Sri Lanka's energy storage transformation, supporting grid stability as the country expands renewable energy integration. Interested parties may submit inquiries via email.

This international competitive tender plans to develop a 250 MW / 1000 MWh standalone battery energy storage system. The project is divided into 25 individual BESS projects, each with a capacity of 10 MW / 40 MWh (AC), to be developed at 25 grid substations across the country. These substations include Ambalangoda, Ampara, Bolawatta, Chunnakam, Hambantota, Kurunegala, Matara, Galle, Monaragala, and others.

The project will be developed under a Build-Own-Operate (BOO) model, with the tender scope including a 15-year energy storage agreement and the development of a 33 kV grid connection at each substation.

Previously, Sri Lanka awarded a BESS tender to WindForce PLC for the development of 12 standalone battery energy storage system projects with a total capacity of 120 MW / 480 MWh. These projects were also obtained through an international competitive bidding process under the Build-Own-Operate (BOO) model, with a 15-year contract period.

The country has also advanced large-scale wind power projects. Last year, Sri Lankan President Anura Kumara Dissanayake presided over the groundbreaking ceremony for the country's first utility-scale wind power project—the 50 MW Mannar Wind Power Project. Located in the northern coastal region of Sri Lanka, the project is supported by Chinese wind turbine manufacturer Envision Energy.

Additionally, Sri Lanka has developed its first grid-scale standalone BESS project, led by WindForce. The country previously announced a collaboration with the International Finance Corporation (IFC) and WindForce PLC to develop a utility-scale 100 MW solar power facility, expected to generate approximately 220 GWh of clean electricity annually.