Retail Center Rooftop Solar — Rockland, Maine

Large retail properties have a major opportunity sitting above them: roof space.

For this retail center in Rockland, Maine, NRGTree completed a 1,378 kW DC rooftop solar project across a large commercial shopping center property. The system was built during the winter of 2026, requiring careful planning, coordination, and execution through challenging seasonal conditions.

Project Scope

Retail centers and malls are strong candidates for rooftop solar because they typically have large, open roof areas, meaningful electric demand, and long-term ownership value. When structured correctly, these properties can use solar to reduce exposure to utility costs, create long-term energy value, and turn underutilized roof space into a productive asset.

This project required more than a standard installation. Working on an active retail property means construction must be coordinated around tenants, customers, deliveries, parking areas, safety requirements, and daily business operations. NRGTree managed the process with a focus on execution, communication, and minimizing disruption to the property.

Outcome

The Rockland project is a clear example of what commercial rooftop solar can look like at scale. A large flat roof, strong solar exposure, and the right development strategy created an opportunity to build a long-term energy asset on a property that was already in use.

For retail centers, shopping plazas, malls, industrial buildings, and other large commercial properties, rooftop solar is not just an energy project. It is a real estate and infrastructure strategy.

Project Details

• Location: Rockland, Maine
• Property Type: Retail center / shopping mall
• Project Type: Commercial rooftop solar
• System Size: 1,378 kW DC
• Completed: Winter 2026
• NRGTree Role: Development, engineering coordination, utility coordination, EPC execution, construction management, and project closeout