Canadian Solar Inc has reported that its e-STORAGE division successfully completed fire testing on the SolBank 3.0 battery system in accordance with CSA C-800:25 §9.7.
The test, which took place under the Large-Scale Fire Testing (LSFT) protocol, demonstrated that the SolBank 3.0 can prevent fire propagation between battery enclosures.
According to Canadian Solar, the test verified the passive fire containment features of the system and aligned with fire safety goals set out in NFPA 855.
The company stated that the LSFT standard is designed to replicate a fully developed fire in a battery energy storage system (BESS) enclosure and assess its impact on nearby units.
Canadian Solar explained that the test verified that all structural elements of the battery enclosures remained sealed and undamaged during the fire.
It added that the SolBank 3.0 system successfully contained the event to the origin unit, preventing ignition of neighboring enclosures and meeting containment objectives required by North American safety codes.
The company said the test was independently witnessed and verified by the CSA Group, which conducted the testing, and Energy Safety Response Group (ESRG), a fire safety consultancy.
Josh Dinaburg, Fire Test Specialist at CSA Group, said: “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 the end-users and site managers, first responders, insurance adjusters, and the community at large where these systems may be installed.”
Canadian Solar reported that the SolBank 3.0’s performance in the LSFT supports its use in utility-scale deployments that demand clear evidence of fire containment capability.
Colin Parkin, President of e-STORAGE, said: “Successfully completing the Large-Scale Fire Testing reinforces our high standard on system safety.
“At the same time, it once again positions e-STORAGE as a leader in delivering safe, scalable energy storage solutions—across products, projects, and markets—and our continued commitment to go beyond industry standards for operation safety.”
Canadian Solar added that it views this test as an important step in providing confidence to customers, regulators, and fire service professionals.
Canadian Solar has completed large-scale fire testing on its SolBank 3.0 energy storage system.
The test followed the CSA C-800:25 §9.7 protocol for Large-Scale Fire Testing.
It was intended to assess whether a fire in one BESS unit would spread to others.
The company reported that the test showed no fire propagation beyond the initiating unit.
The test was independently verified by CSA Group and Energy Safety Response Group.
All structural elements of the adjacent enclosures remained intact.
The test aligns with fire safety criteria from NFPA 855.
Josh Dinaburg of CSA Group stated the system prevented spread to nearby units.
Colin Parkin of e-STORAGE said the result supported the safety standards of the system.
Canadian Solar stated this supports deployment at utility-scale energy projects.
