Daytime view of solar panels installed on the roof of a multistory building

Roof Mount Solar Power Systems

Roof mount solar power systems are a popular choice for municipal governments, commercial and industrial facilities, school systems and universities. Building rooftops are an often overlooked space with enough room for large solar arrays.

Depending on the available roof area and your usage profile, you may be able to generate 100% of the energy you need through solar power. In some locations, excess power can be sold back to the electrical grid, potentially turning rooftops into revenue.

Ameresco offers Solar PPA financing and complete design, build own and maintain services, allowing building owners to go solar without up-front investments or additional expenses. Rooftop solar systems can be mounted using ballasts, which do not disturb the roof surface, or traditional rooftop mounting systems.


  • A low-cost, proven and common way to tap solar power
  • Choice of installation options, including no-penetration ballasted mounts
  • Revenue generation from under-used roof areas

Additional Media

Building a Renewable Airport

View of solar panels on top of Minneapolis-St. Pauil International Airport with superimposed video play button

CNN looks at the technology behind the solar installation at Minneapolis-St. Paul International Airport. (Video opens in new window.)

Free White Paper: The Rise of Clean Energy Microgrids & Why They Make Sense

Why microgrids make sense for hospitals, higher education, military & government and businesses.

Solar Panels + LED Lighting = Near-Zero Energy Consumption

Airport Improvement magazine looks at how solar panels and LED lighting combine to provide near-zero energy consumption at Minneapolis-St. Paul International Airport’s parking facilities.

Case Studies

Daytime view of solar panels installed on the roof of Melrose Middle School

City of Melrose

Ameresco developed several plans to add solar power to school roofs. The final project was chosen to deliver the lowest solar PPA price to the City of Melrose.

Aerial view shows solar panels on the roof of Sun Devils Stadium at Arizona State University

Arizona State University

ASU made extensive use of rooftop solar panels on its stadium, arena and campus buildings to help achieve $8 million in annual energy savings.

View of Minneapolis from solar panel farm at Minneapolis-St. Paul International Airport

Minneapolis-Saint Paul International Airport

It’s Minnesota’s largest solar energy project to date, and further efficiency will be gained with lighting enhancements.