CASE STUDY: The Nation’s Largest Renewable Energy Powered Bus Depot with On-Site Green Hyrdogen Production

Case Studies
2 min read

Montgomery County, MD

Case Studies
2 min read

Revolutionizing Sustainable Transportation: AlphaStruxure’s Hydrogen Powered Microgrid and Charging Solution

The challenge:

  • Montgomery County, Maryland is a national leader in responding to the challenge of climate change with goals to reduce greenhouse gas (GHG) emissions 100% by 2035
  • The County wants to transform their Equipment Maintenance & Transit Operation Center (EMTOC) into a self-sustaining bus depot to power a mixed fleet of 200+ buses with renewable energy.
  • Incorporate green hydrogen production to support fuel cell electric buses (FCEBs) and enhance the county’s Bus Rapid Transit (BRT) network.
  • Uninterrupted transit bus services under any power circumstances are required to ensure a ready supply of sustainable, resilient, and cost-effective power for the new bus fleet


  • Montgomery County leveraged its progressive energy purchasing regulations to create a public-private partnership with AlphaStruxure to design, build, finance, own, and operate the Microgrid
  • The 7MW microgrid will consist of 5MW of solar, 2 MW/7.35 MWh battery energy storage, and 4.5 MW of charging capacity
  •  An on on-site electrolyzer powered by solar and battery energy storage will enable green hydrogen production to support FCEBs
  • The microgrid will be interconnected to the utility but engineered to operate in island mode, ensuring uninterrupted service during power disruptions
  • The solution is delivered at no upfront cost through a Energy as a Service agreement, ensuring predictable operating expenses and guaranteed performance for sustainability, resilience, and reliability


  • AlphaStruxure’s Energy as a Service model and integrated Microgrid helped Montgomery County become a leader in fleet electrification and a sustainability archetype for local governments across the country — all with zero capital outlay.
  • On-site renewable energy generation and battery energy storage solutions provide peace of mind for the County’s 1.1 million residents, ensuring buses can operate in the event of a main grid outage.
  • This project also advances the County’s goal of reducing carbon emissions 80% by 2027, and 100% by 2035 with a 4,000 metric ton reduction in scope 1 and 2 CO2 emissions
  • The largest self sustaining bus depot in the nation, powered by renewable energy
  • The first on the east coast to feature green hydrogen production
  • Long-term cost predictability of energy supply

AlphaStruxure is the industry’s top-ranked Energy as a Service (EaaS) provider. Its purpose is to decarbonize energy infrastructure at speed and scale. It’s on a mission to design, finance, build, own, operate, and maintain energy infrastructure, including microgrids, to deliver emissions reductions, reliability, and resilience. By doing so, the company helps public- and private-sector organizations achieve ambitious, tailored energy transformations — without the CapEx or complexity. 

Explore more on Energy Transition

General ASX Microgrid Rendering
bus depot microgrid tour
Are you a transit agency applying for the Low-No NOFO? Did you include charging and energy infrastructure in your application? Since FTA guidelines allow partnerships, including a proven energy and sustainability partner like AlphaStruxure can help your zero-emissions project stand right out.Oh. And you can bypass the RFP process while you’re at it. Learn how you can gain a competitive advantage for your Lo-No application and see how we can applying match funds to help you achieve your ambitious decarbonization goals. 

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