Together, the Elora and Hedley projects will provide 420 MW / 2,122 MWh of new storage capacity to Ontario's grid, making them among the largest energy storage facilities currently under development in the province.

Canadian Solar Inc. (the "Company" or "Canadian Solar") (NASDAQ: CSIQ) today announced that e-STORAGE, part of the Company's majority-owned subsidiary CSI Solar Co., Ltd. ("CSI Solar"), has entered into Battery Storage Agreements (BSA) and Long-Term Services Agreements (LTSA) with Aypa Power for the Elora and Hedley battery energy storage projects in Ontario, Canada.

Together, the Elora and Hedley projects will provide 420 MW / 2,122 MWh of new storage capacity to Ontario's grid, making them among the largest energy storage facilities currently under development in the province. The investments underscore Ontario's growing role in large-scale storage deployment and highlight continued collaboration between e-STORAGE and Aypa Power to deliver critical energy infrastructure across North America.

Both projects will deploy e-STORAGE's SolBank product under 20-year LSTAs that include continuous monitoring, preventive maintenance, and performance guarantees. These contracts are structured to ensure high system availability and predictable service revenues over the life of the assets. Delivery is scheduled to commence in the first quarter of 2026, with commercial operation expected in the first half of 2027.

Moe Hajabed, CEO of Aypa Power, commented, "The Elora and Hedley projects represent critical investments in Ontario's energy system, providing the flexible capacity needed to meet rising demand and maintain a reliable grid. By working with trusted partners and applying the highest standards in performance and safety, we are building assets that deliver lasting value to Ontario's communities and economy."

Colin Parkin, President of e-STORAGE, added, "We are proud to expand our partnership with Aypa Power through the Elora and Hedley projects. These projects will provide reliable capacity through the IESO's Long-Term 1 ("LT1") Resource Adequacy framework and reaffirm our long-term commitment to the Canadian market."

About Canadian Solar Inc.

Canadian Solar is one of the world's largest solar technology and renewable energy companies. Founded in 2001 and headquartered in Kitchener, Ontario, the Company is a leading manufacturer of solar photovoltaic modules; provider of solar energy and battery energy storage solutions; and developer, owner, and operator of utility-scale solar power and battery energy storage projects. Over the past 24 years, Canadian Solar has successfully delivered nearly 165 GW of premium-quality, solar photovoltaic modules to customers across the world. Through its subsidiary e-STORAGE, Canadian Solar has shipped over 13 GWh of battery energy storage solutions to global markets as of June 30, 2025, boasting a $3 billion contracted backlog as of June 30, 2025. Since entering the project development business in 2010, Canadian Solar has developed, built, and connected approximately 12 GWp of solar power projects and 6 GWh of battery energy storage projects globally. Its geographically diversified project development pipeline includes 27 GWp of solar and 80 GWh of battery energy storage capacity in various stages of development. Canadian Solar is one of the most bankable companies in the solar and renewable energy industry, having been publicly listed on the NASDAQ since 2006. For additional information about the Company, follow Canadian Solar on LinkedIn or visit www.canadiansolar.com.

About e-STORAGE

e-STORAGE is a subsidiary of Canadian Solar and a leading company specializing in designing, manufacturing, and integrating battery energy storage systems for utility-scale applications. e-STORAGE offers proprietary battery energy storage solutions, comprehensive EPC services, and innovative solutions aimed at improving grid operations. Currently, e-STORAGE operates fully automated, state-of-the-art manufacturing facilities with an annual battery energy storage system capacity of 10 GWh and battery cell capacity of 3 GWh. For more info, please refer to the Media&PR section of www.csestorage.com and follow our LinkedIn page.

About Aypa Power

Aypa Power, a Blackstone portfolio company, develops, owns, and operates utility-scale energy storage and hybrid renewable energy projects across North America. With 30 projects currently in operation or under construction, and a development pipeline exceeding 22 gigawatts, Aypa delivers solutions that strengthen grid reliability, integrate renewable energy, and reduce dependence on fossil fuels. Aypa has been at the forefront of energy storage development since its first energy storage project came online in 2018. For more information, follow Aypa Power on LinkedIn or visit www.aypapower.com