Nighttime exterior of a commercial buildiing with the Sydney skyline behind it


The loss of grid power frequently means major interruption to mission-critical work, that may have catastrophic results to your business. As organizations are becoming increasingly concerned about reliable utility supply, power quality and the vulnerability of the overall grid system, many are taking greater responsibility to secure their own energy supply and infrastructure – particularly those organizations and industries dependent on reliable power without interruption.

At a time when organizations like yours aim to build more robust, resilient and secure energy infrastructures, Distributed Energy Resources (DER) can provide reliable solutions not only in driving greater energy efficiencies and insuring critical resources, but also as viable alternatives to traditional centralized generation.

Ameresco is pioneering microgrid and energy security systems that are flexible, scalable, and utilize a combination of renewable power generation and energy conservation and load reduction measures. Ameresco provides these systems through 20-year Power Purchase Agreements (PPAs) at a Guaranteed Maximum Price per kWh that is usually less than purchasing electricity directly from the grid. Ameresco makes this possible by leveraging its considerable energy project development experience to design cost-effective solutions tailored to each customer’s individual needs and by taking advantage of federal, state, and utility incentives to subside the systems’ overall costs.

Ameresco’s microgrid and energy security systems consist of four major building blocks:

  1. Onsite battery energy storage
  2. Onsite PV power generation
  3. A flexible, scalable microgrid control platform
  4. Comprehensive energy conservation and load reduction measures.

We manage these power generating assets designed to supply building loads, which we reduce via energy conservation measures, via local micro-grid control systems that integrate with backup power sources, battery storage, and the local utility grid, optimizing system performance, maximizing energy cost savings, and enhancing the reliability of the electric supply.

Our experienced team of highly talented experts brings a unique perspective to energy generation and energy storage requirements. We utilize our technical, financial and management resources to deliver world-class innovative solutions. Ameresco’s construction management resources implement projects safely, on schedule, and in coordination with tenant occupancy. And our project development work, engineer-procure-construct (EPC) and commissioning services, and O&M are all handled in-house.

Case Studies

Rendered image of solar parking canopies at a Parris Island parking lot

Parris Island

Solar, cogeneration and battery storage combine with a microgrid control system to ensure energy reliability and to reduce grid demand at peak times.

Daytime view of the main buildings at Portsmouth Naval Shipyard as seen from the water

Portsmouth Naval Shipyard

Microgrid technology allows critical systems across the shipyard’s grid to disconnect completely from outside grid power for self-sufficient operation.