e-STORAGE’s SolBank 3.0 Achieves Fire Safety Certification Through Successful Large-Scale Testing

e-STORAGE’s SolBank 3.0 Successfully Passes Large-Scale Fire Testing (LSFT)

The recent Large-Scale Fire Testing (LSFT) of e-STORAGE’s SolBank 3.0 energy storage system has yielded successful results, confirming that it meets essential fire safety standards. This testing demonstrated the system’s ability to contain thermal events within a single enclosure, thereby enhancing safety for utility-scale applications.

Canadian Solar Inc. (NASDAQ: CSIQ) announced that its subsidiary, e-STORAGE, has achieved this significant milestone. The LSFT was conducted in accordance with the CSA C-800:25 §9.7 protocol, a stringent industry standard designed to assess the risk of fire propagation between adjacent battery energy storage systems (BESS) during a fully developed fire condition.

During the test, all doors, louvers, and structural components of the target units remained closed and intact. The protocol aligns with crucial safety objectives outlined in NFPA 855, which aim to prevent cascading thermal events and ensure that fires remain contained within a single unit. Notably, e-STORAGE’s SolBank 3.0 showed no fire spread to neighboring units, successfully passing the LSFT and affirming the effectiveness of its passive fire containment design.

The testing was independently verified by CSA Group and Energy Safety Response Group (ESRG), a fire safety consulting firm. Josh Dinaburg, a Fire Test Specialist at CSA Group, remarked on the importance of this testing, stating, “Key stakeholders in the energy storage industry have raised justifiable concerns about the ability of BESS to limit the spread of fire between units without relying on complex extinguishing systems or putting first responders at risk. The e-STORAGE system demonstrated that an aggressive fire consuming all available fuel in one unit does not ignite new fires and spread to adjacent units. This is critical performance data for end-users, site managers, first responders, insurance adjusters, and the community where these systems may be installed.”

Colin Parkin, President of e-STORAGE, highlighted the significance of this achievement, saying, “Successfully completing the Large-Scale Fire Testing reinforces our high standard on system safety. At the same time, it positions e-STORAGE as a leader in delivering safe, scalable energy storage solutions across products, projects, and markets, demonstrating our commitment to exceeding industry standards for operational safety.”

### About Canadian Solar Inc.

Founded in 2001 and headquartered in Kitchener, Ontario, Canadian Solar is one of the world’s largest solar technology and renewable energy companies. The company is a leading manufacturer of solar photovoltaic modules and provides solar energy and battery energy storage solutions. It has developed, built, and connected approximately 11.6 GWp of solar power projects and 4.5 GWh of battery energy storage projects globally. As of March 31, 2025, Canadian Solar has shipped over 11 GWh of battery energy storage solutions to global markets, boasting a $3.2 billion contracted backlog. The company has a geographically diversified project development pipeline that includes 27 GWp of solar and 76 GWh of battery energy storage capacity in various stages of development. Canadian Solar has been publicly listed on NASDAQ since 2006.

### About e-STORAGE

e-STORAGE, a subsidiary of Canadian Solar, specializes in designing, manufacturing, and integrating battery energy storage systems for utility-scale applications. The company offers proprietary battery energy storage solutions, comprehensive EPC services, and innovative approaches to improve grid operations. Currently, e-STORAGE operates two fully automated, state-of-the-art manufacturing facilities with an annual battery production capacity of 20 GWh. For more information, visit the Media & PR section at www.csestorage.com and follow their LinkedIn page.