Forging a national legacy:

Our Portfolio of Alternative Energy Investments

WGL has worked to build a presence locally, regionally and nationally as a leader in the development and implementation of alternative energy solutions.

National Highlights
Case Studies
University of Maryland: Toward a Renewable Future
Powering Washington’s Favorite Teams with Renewables
Shining Light: Powering D.C. Buildings with On-Site Solar
Government Infrastructure for the Future

We have built our alternative energy portfolio on a consistent and growing commitment. Each year, our accumulating investment generates an increasing level of revenue. As we have gained experience in alternative energy, our annual investment has grown, reaching an annual rate of $100 million or more over the past four years.

We’ve also become more sophisticated, growing toward a distributed generation model that involves large multiple-solution projects that employ natural gas, solar, remotely generated wind and other solutions. One of those massive projects—supplying a comprehensive solution to the U.S. government’s General Services Administration—is now taking shape, with others also in the works.

WGL now has alternative energy projects across the United States, representing a total investment of almost $700 million.

Producing power at or near the site of consumption, utilizing a diverse combination of traditional energy, such as natural gas, along with renewable resources such as wind, solar, geothermal and more.


254,003 MWh

University of Maryland: Toward a Renewable Future

Case Study
Celebrating the addition of 2.2 MW of capacity at UMD

The University of Maryland (UMD) is one of WGL’s oldest customers. Through its regulated utility, Washington Gas, WGL has provided natural gas to UMD for decades. WGL’s partnership with UMD also represents one of our most established relationships, as we provide for the university’s more diverse energy needs, including electricity and alternative energy sources.

Located in College Park, Maryland, UMD first embraced solar energy as an alternative source of power when it partnered with WGL in 2011 to install solar panels on its Severn Building. Since then, the university has developed an ambitious plan to ensure that, by 2020, 100 percent of its purchased power comes from renewable sources.

Solar canopies at the University of Maryland

UMD is well on its way toward that goal, most recently engaging with WGL in a purchased power agreement to fund the installation of solar canopies on top of three UMD parking garages, adding nearly 2.2 megawatts of generating capacity, meeting 80 percent of the university’s goal of 2.7 megawatts of solar power for university facilities by 2018.

When added to the power generated from solar installations on its Severn Building and the Institute for Bioscience and Biotechnology Research, the new project brings UMD’s total capacity to more than 3,000 megawatt hours generated by solar power, the equivalent emissions reduction of not burning nearly 5,200 barrels of oil—that’s more than 250,000 gallons of gasoline.

Powering Washington’s Favorite Teams with Renewables

Case Study
Watch The Video

WGL in 2017 structured the solar supply delivery from a 10.8 megawatt ground-mounted facility in Frederick County, Maryland. The project will provide solar power to Washington, D.C.’s Capital One Arena, which is owned by Monumental Sports & Entertainment, and the National Geographic Society, as well as the 28 Walker Development, in Baltimore, Maryland—all three in congested downtown urban areas.

Constructed and operated by Cypress Creek Renewables, the solar farm will supply 25 percent of the power needs of the Capital One facility, which alone will consume about 4.7 million kWh per year of output from the solar installation.

WGL has served as the official energy and greening partner of Capital One Arena since 2015, donating carbon offsets to counterbalance emissions from Washington Wizards, Washington Capitals and Washington Mystics home games, concerts and other events. Last year more than 3,123 tons of greenhouse gas emissions from 201 events at the arena were counterbalanced with carbon offsets. This is equivalent to avoiding the consumption of over 351,000 gallons of gasoline, or taking 660 cars off the road for one year.

Shining Light: Powering D.C. Buildings with On-Site Solar

Case Study

In January of 2016, the District of Columbia Department of General Services (DGS) launched one of the largest municipal portfolios of onsite solar energy projects in the U.S.: 34 District-owned schools, hospitals, recreation centers, police training facilities and a carport served in part by 11.4 megawatts of power.

Partnering with Sol Systems—a solar development firm located in Washington, D.C.—WGL provided the financing to implement these projects using a power purchase agreement. This portfolio was unique in that the projects were implemented across a very diverse set of facilities at the same time. Each site within the DGS portfolio had its own limitations in terms of rooftop layout and system design, in addition to strict requirements not to disrupt operations at schools and public safety facilities. The total size of the rooftop space was approximately 1.5 million square feet.

Despite the challenges, the portfolio was successfully completed in July 2017, creating 140 jobs during installation. Combined, the installations produce about 13,800 MWh annually, and are expected to save $25 million in taxpayer dollars over the purchase power agreement’s 20-year term.

Government Infrastructure for the Future

Case Study

WGL has a strong and growing relationship with the U.S. General Services Administration (GSA) to supply a broad array of energy solutions to the government agency that owns and leases the federal government’s vast network of buildings nationwide.

Focused so far on the GSA’s properties in Washington, D.C., and Maryland, WGL is supplying natural gas, alternative energy and distributed generation under a wide variety of configurations. In 2016, WGL completed the sale of approximately 2 megawatts of installed solar capacity on eight federal buildings in Washington, D.C., including the State Department’s Harry S. Truman Building, the Natural History and American Indian museums, the GSA Central Office and the Health and Human Services Humphrey Building. The operation of those installations began in calendar year 2017.

WGL also sold approximately 540,000 Green-e certified Renewable Energy Credits to the Architect of the Capitol (AOC), which is responsible for the operation, development and preservation of 17.4 million square feet of federal buildings, and is currently installing a cogeneration facility at the AOC’s huge Capitol Power Plant. By producing steam and electricity together, the cogeneration plant will reduce emissions of greenhouse gases by 6.5 percent and reduce emissions of hazardous air pollutants by 18 percent.

Finally, Washington Gas recently signed a new five-year firm natural supply agreement with the GSA’s Central Heating Plant, another cogeneration facility that was a $70 million Washington Gas project completed in 2003.