ESS’ Energy Center is First LDES Solution to Receive IEEE 693 Rating Demonstrating Resilience Against Seismic Events

ESS Tech, Inc. (ESS) (NYSE: GWH), a leading manufacturer of long-duration energy storage systems (LDES) for commercial and utility-scale applications, today announced that the company’s Energy Center product line has passed rigorous testing and meets the requirements for the highest level of IEEE 693 certification, a widely-accepted seismic rating for energy infrastructure. This standard provides assurance that the Energy Center product line qualifies for deployment as critical infrastructure across the United States. The company is the first non-lithium LDES provider to receive such a rating.

Testing was conducted by the Pacific Earthquake Engineering Research Center at the University of California, Berkeley, and included a shake table test of ESS battery module assemblies and thorough evaluation of Energy Center design. Certification to the IEEE 693 – Level: High standard demonstrates that the Energy Center can withstand acceleration up to 2.5 times the force of gravity and be relied upon to provide power during major seismic events.

“We are committed to providing resilient, high-quality energy storage solutions that customers can rely on when they need them most, especially during extreme weather or natural disasters,” said ESS Chief Technology Officer, Dr. Julia Song. “Achieving IEEE 693 certification for the Energy Center follows rigorous testing and demonstrates the key role for ESS technology in the critical infrastructure powering the clean energy future.”

ESS iron flow battery technology offers numerous safety advantages over incumbent energy storage technologies including significantly lower risk of fire and a safe and sustainable electrolyte primarily made of iron, salt and water. Availability of flexible, safe and resilient LDES technologies will be critical as the world transitions to renewable energy. In regions such as California, a global leader in renewable energy that is also susceptible to significant earthquake activity, energy storage technology must be able to withstand seismic events without sustaining damage or causing power interruptions.

“Thanks to our engineering team’s efforts, we are continuing to develop, deploy and validate cutting edge long-duration energy storage solutions that provide the secure, resilient power that our customers require,” ESS CEO Eric Dresselhuys said. “Achievement of IEEE 693 follows rigorous testing and is an attestation to the quality and reliability of ESS solutions.”