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Independent Fire Testing Confirms Eos Z3 Battery System Exhibited No Thermal Runaway, No Sustained Fire, and No Propagation Under Abuse Testing; Company Receives ISO 14001 Certification

$EOSEPress releaseJun 22, 2026, 8:30 AM ETRead the release

Eos Energy Enterprises announced that third-party testing by the Energy Safety Response Group confirmed its Z3 battery modules exhibited no thermal runaway, no sustained fire, and no propagation under severe abuse conditions including direct flame impingement and overcharge. The results address evolving NFPA 855 fire-test requirements and validate the inherent safety advantages of the company’s zinc aqueous chemistry for dense urban deployments.

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