ESS Energy Center receives Smarter E innovation award, highlighting the key role of LDES in the clean energy transition

ESS’s flagship utility-scale product recognized as an innovative, safe and sustainable technology that will accelerate global decarbonization.

Munich, June 19, 2024–(BUSINESS WIRE)–ESS Tech limited liability company (ESS) (NYSE: GWH), a leading manufacturer of long-term energy storage (LDES) systems for commercial and utility-scale applications, today announced that its Energy Center™ system received the Smarter E Award for energy storage technology at the Smarter Ceremony E awards ceremony taking place before the Intersolar Europe trade fair in Munich, Germany.

The smarter E Award is awarded by a selected group of independent industry experts, analysts and scientists and is one of the most important awards in the energy industry.

On June 18, 2024 in Munich, ESS received the award for its Energy Center system, a safe and sustainable utility-scale, front-of-meter LDES product that provides over eight hours of energy storage for a wide range of use case applications and customers thanks to its modular, scalable design . The judging criteria included technical innovation, uniqueness, social and economic benefits, safety and creativity.

“We are honored to be recognized by Smarter E. This award highlights the critical role that long-term energy storage will play in the clean energy transition, as well as the value that ESS’s Energy Center product line provides customers,” said Eric Dresselhuys, CEO of ESS . “ESS iron flow technology provides the long-term storage required for baseload renewable energy generation, while providing the flexibility utilities and generators need to manage a fully renewable grid.”

The core technologies of Energy Center and ESS have received numerous certifications to international standards, including UL1973, UL 9540 and IEEE 693 – High, which together confirm the highest safety and resilience of ESS products. The inaugural Energy Center is currently undergoing commissioning and testing in Oregon and will be incorporated into the system delivered to Portland General Electric later this year.

Throughout the duration of the fair, ESS will be available at stand B2-453.

About ESS, Inc.

Our mission at ESS (NYSE: GWH) is to accelerate global decarbonization by ensuring a safe and sustainable LDES system that powers people, communities and businesses with clean, renewable energy anywhere, anytime. As more and more renewable energy is added to the grid, LDES becomes essential to providing the reliability and resiliency we need when the sun isn’t shining and the wind isn’t blowing.

Our technology harnesses iron, salt and water found in the earth to provide environmentally safe solutions that can provide up to 12 hours of flexible energy capacity for commercial scale and utility energy storage applications. Founded in 2011, ESS Inc. enables project developers, independent power producers, utilities and other large energy users to implement reliable, sustainable and long-lasting energy storage solutions.

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More information can be found at www.essinc.com

Forward-looking statements

This announcement contains certain forward-looking statements regarding the expectations, hopes, beliefs or intentions of ESS and its management team regarding the future. The words “estimate”, “expect”, “will” and similar expressions may identify forward-looking statements, but the absence of these words does not mean that the statement does not relate to forward-looking statements. Examples of forward-looking statements include, but are not limited to, statements regarding the status of ESS products and technologies and customer relationships and product implementations. These forward-looking statements are based on ESS’s current expectations and beliefs regarding future developments. Many factors could cause actual future events to differ materially from these expectations, including, without limitation, disruptions or quality control problems in the Company’s manufacturing operations; as well as the risks and uncertainties set forth in the section entitled “Risk Factors” in the Company’s Quarterly Report on Form 10-Q for the three months ended March 31, 2024, filed with the Securities and Exchange Commission (the “SEC”) on May 8, 2024 and other documents filed with the SEC. Except as required by law, ESS undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

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