EPC Energy is proud to announce a major milestone in the development of a 25 MW / 100MWh Battery Energy Storage System (BESS) for the City of Pasadena Water and Power (PWP). Located at the existing Glenarm Power Plant in Pasadena, California, the project is designed to strengthen grid reliability and support the City’s clean energy future.
Project Highlights
- 25 MW / 100 MWh utility-scale BESS
- Powered by EPC Energy’s E2500 Series
- Located at the Glenarm Power Plant
- Supports renewable energy integration
- Enhances long-term grid resilience
- Expected Commercial Operation Date (COD): Q2 2027
Project Challenges & Considerations
- Urban site constraints with limited footprint at existing power facility
- Advanced fire mitigation requirements
- Noise mitigation considerations to minimize operational noise
- Multi-stakeholder coordination across utility teams, regulatory agencies, and community stakeholders
As utilities modernize aging infrastructure, projects like Glenarm demonstrate the growing shift away from traditional fossil-fuel peaker plants toward cleaner, more flexible energy storage solutions. Battery storage helps improve air quality, reduce emissions, and deliver reliable power when demand is highest.
Partnership & Progress
Developed in partnership with Pasadena Water and Power under an Energy Storage Agreement (ESA), the Glenarm BESS project reflects EPC Energy’s commitment to delivering scalable, forward-thinking clean energy solutions for public power agencies. The project also showcases EPC Energy’s ability to provide truly turnkey energy storage infrastructure from conceptual design through final commissioning.
By overseeing project management internally and leveraging the expertise of our in-house design and engineering team, EPC Energy has maintained direct involvement throughout every stage of development while working closely with PWP to move the project forward efficiently and collaboratively. EPC Energy also assembled a strong network of private equity and financing partners to support project execution, demonstrating our ability to structure and deliver utility-scale energy projects beyond engineering alone. As the project equipment provider, EPC Energy is supplying the integrated energy storage solution, reinforcing our vertically integrated approach to delivering reliable, scalable infrastructure.
After months of close collaboration between EPC Energy and PWP, the project has officially entered the construction bidding phase — a major milestone toward bringing the system online. We’re excited about the momentum behind the Glenarm BESS project and look forward to the next stages as development continues to ramp up.