• System Specs | 69 kW
  • System Production | 101 MWh annually
  • Environmental Benefits | Annual offset CO2 equivalent to 57.1 acres of forest

The Daughters of the American Revolution (DAR) is a non-profit, non-political volunteer women's service organization dedicated to promoting patriotism, preserving American history, and securing America's future through better education for children. For more than a century, the members of the National Society of DAR have dedicated themselves to historical preservation, promotion of education, and encouragement of patriotic endeavor. Standard Solar (SSI) partnered with tenK solar to provide DAR in Washington D.C. with an innovative 69 kW flat rooftop solar array. Standard Solar worked closely with DAR to ensure the installation met structural conditions, historic preservation requirements and resulted in an economic solar solution.

DAR members are not only passionate about educating the local community and preserving the history of the American Revolution, they are also passionate about preserving their environment. This passion and commitment led to their pursuit of a way to preserve energy, reduce operation costs, but also preserve the historic fabric of the National Headquarters. It soon became clear that solar was the ideal solution.

DAR and SSI met to discuss the best approach in implementing solar energy at the facility and obtaining the sustainability goals for its historic Constitution Hall. The Hall opened in 1929, and was designed to house the annual DAR convention. It is currently Washington DC’s largest Concert Hall, welcoming more than half a million patrons each year. The primary concern satisfying DAR’s sustainability goals with very limited roof space of a building constructed in 1929. SSI relied on its past experience combined with new equipment options to design a solution. After proposing an innovative approach designed to maximize available roof space, SSI was selected as the developer to install a 69kW solar installation on the Hall.

As a historic facility, the photovoltaic (PV) system design was critical. SSI worked closely with DAR on the innovative installation to ensure it met structural conditions, historic preservation requirements and resulted in an economic solar solution. “This project with DAR is a leading example of how solar production can be maximized even on urban buildings where space is limited,” said Tony Clifford, CEO of Standard Solar. “In addition to being innovative with the use of rooftop space, our design had to integrate the requirements of a historic building and maintain the integrity of the architecture. The result is a highly efficient advanced solar system powering an 85 year old historic structure—a progressive blend of history and modern technology.”

The array, mounted on the rooftop of the Hall, produces 100,786 kWh of energy per year and helps offset the energy demand of DAR Constitution Hall. The energy produced by the system saves the equivalent of 69.5 metric tons of carbon dioxide which is an annual offset equal to that of 57.1 acres of forest or a reduction of of 7,820 gallons of gasoline consumed.. SSI utilized PV solutions from tenK to maximize the array output, minimize weight loads and deliver savings to DAR.

“A Conservation Committee dedicated to all things environmental has existed within DAR for over 105 years, and historic preservation is one of our Society’s founding missions,” stated DAR President General Lynn Forney Young. “So when presented the opportunity to reduce operating costs in a manner that conserves energy and preserves the historic fabric of our National Headquarters at the same time, it was an easy decision to make. Next year will be DAR’s 125th anniversary, and I am proud that our organization continues to change with the times and embrace innovative technology that is good for DAR, the Washington, D.C. community and the environment.”

DAR Constitution Hall
DAR Constitution Hall Solar Panels
DAR Constitution Hall Solar Project
DAR Constitution Hall Solar Panel Closeup