Hotel RIU Plaza Chicago Installation Marks RIU’s Fourth Capstone Project

Capstone Green Energy Holdings, Inc. (the "Company” or “Capstone”) (OTCID: CGEH) and Capstone Green Energy, LLC announced that Vergent, Capstone’s exclusive distributor for the Midwest and Northeast United States, will hold a ribbon cutting ceremony with RIU Hotels & Resorts for a high-efficiency Combined Heat and Power (CHP) microturbine system installation at Hotel RIU Plaza Chicago. The system was ordered in December of 2024 and delivered in March 2025.

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The Hotel Riu Plaza in Chicago marks RIU’s fourth Capstone Project and features three C65 ICHP microturbines in a combined heat and power (CHP) application. The new system highlights RIU’s ongoing commitment to sustainability, operational cost savings, and energy resilience across its North American properties.

This marks RIU’s fourth Capstone-powered hotel, with three previous projects, two in New York and one in Toronto. The new system, installed in July 2025, highlights RIU’s ongoing commitment to sustainability, operational cost savings, and energy resilience across its North American properties.

Project Details:

• Three Capstone C65 ICHP microturbines
• Three gas compressors
• Vergent Energy Plant Controller with remote monitoring
• On-site electricity and hot water generation
• Factory Protection Plan (FPP) contract

The Hotel RIU Plaza in Chicago marks RIU’s fourth Capstone Project and features three C65 ICHP microturbines in a combined heat and power (CHP) application. The new system highlights RIU’s ongoing commitment to sustainability, operational cost savings, and energy resilience across its North American properties.

The Capstone microturbine systems deliver on-site electricity and hot water to support the hotel’s operations, with a long-term Factory Protection Plan (FPP).

This follows the deployment of seven C65 microturbines at Hotel RIU New York Times Square in 2014, and four C65 microturbines for Hotel RIU Plaza Manhattan Times Square in 2019, and two C65 microturbines at Hotel RIU Plaza Toronto in April 2025.

RIU was able to take advantage of a mix of federal and utility incentives supporting clean energy investments for this Chicago project. Combined with the system’s strong performance and long-term cost savings, the project is expected to deliver a payback period of just over one year.

“Capstone microturbines are a smart investment for hotels,” said Justin Rathke, President of Vergent. “They provide clean, on-site power and heat, significantly cutting energy costs. This boosts profitability and asset value, appeals to environmentally conscious guests, and reinforces RIU's sustainability leadership.”

To protect its bottom line from rising utility costs, RIU sought a reliable and efficient energy solution. Capstone’s compact, quiet, and modular design made it an ideal fit for the urban hotel environment, while the proven success of previous installations helped accelerate decision-making.

“This fourth project is an excellent example of how Capstone and its Distribution Partners transform customers into clients. RIU’s continued investment and trust in Capstone systems reflects our shared commitment to energy efficiency, emissions reduction, and long-term value creation,” said Vince Canino, President and CEO of Capstone Green Energy. “This is the kind of forward-thinking partnership we strive for, solving the energy trilemma of resiliency, affordability, and sustainability with proven, efficient, and adaptable technology.”

Capstone microturbines are gaining popularity in the hospitality industry for their low-maintenance and low-emission performance. They help hotels meet ambitious sustainability goals while boosting energy independence and operational resilience.

About Capstone Green Energy

For nearly four decades, Capstone Green Energy has been a leader in clean technology, pioneering the use of microturbines to revolutionize how businesses manage their energy needs sustainably. In collaboration with our global network of dedicated distributors, we have shipped over 10,600 units to 88 countries, helping customers significantly reduce their carbon footprints through high-efficiency, on-site energy systems and microgrid solutions.

Our commitment to a cleaner, more resilient energy future remains steadfast. Today, we offer a comprehensive range of microturbine products, from 65kW systems to multi-megawatt solutions, tailored to meet the specific needs of commercial, industrial, and utility-scale customers. In addition to our core microturbine technology, Capstone’s growing portfolio includes flexible Energy-as-a-Service (EaaS) offerings, such as build-own & transfer models, PPA’s, lease to own and rental solutions, are designed to provide maximum value and energy security.

Capstone’s fast, turnkey power rental solutions are designed for customers with limited capital budgets or short-term energy needs. For more information, please contact us at rentals@CGRNenergy.com.

In our pursuit of cutting-edge energy solutions, Capstone has forged strategic partnerships to expand our impact and capabilities. Through these collaborations, we proudly offer advanced technologies that leverage renewable gas and heat recovery solutions—further enhancing the sustainability, efficiency, and reliability of our clients' operations. These integrated offerings reflect our commitment to building a cleaner, more responsible energy future.

For more information about the Company, please visit www.CapstoneGreenEnergy.com. Follow Capstone Green Energy on Twitter, LinkedIn, Instagram, Facebook, and YouTube.

Cautionary Notes

This release contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. The Company has tried to identify these forward-looking statements by using words such as “expect,” “anticipate,” “believe,” “could,” “should,” “estimate,” “intend,” “may,” “will,” “plan,” “goal” and similar terms and phrases, but such words, terms and phrases are not the exclusive means of identifying such statements. Actual results, performance and achievements could differ materially from those expressed in, or implied by, these forward-looking statements due to a variety of risks, uncertainties and other factors, including, but not limited to, the following: the Company’s liquidity position and ability to access capital; the Company’s ability to continue as a going concern; the Company’s ability to successfully remediate the material weaknesses in internal control over financial reporting; the Company’s ability to realize the anticipated benefits of its financial restructuring; the Company’s ability to comply with the restrictions imposed by covenants contained in the exit financing and the new subsidiary limited liability company agreement; the uncertainty associated with the imposition of tariffs and trade barriers and changes in trade policies; employee attrition and the Company’s ability to retain senior management and other key personnel; the Company's ability to develop new products and enhance existing products; product quality issues, including the adequacy of reserves therefor and warranty cost exposure; intense competition; financial performance of the oil and natural gas industry and other general business, industry and economic conditions; the impact of litigation and regulatory proceedings; inquiries from the SEC; the potential material adverse effect on the price of the Company’s common stock and stockholder lawsuits. For a detailed discussion of factors that could affect the Company’s future operating results, please see the Company’s filings with the Securities and Exchange Commission, including the risk factors contained in our most recent Annual Report on Form 10-K. Except as expressly required by the federal securities laws, the Company undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, changed circumstances or future events or for any other reason.

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Capstone microturbines are gaining popularity in the hospitality industry for their low-maintenance and low-emission performance. They help hotels meet ambitious sustainability goals while boosting energy independence and operational resilience.