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Energy retrofits

Ameresco

Ameresco is an energy infrastructure company that develops, designs, finances, builds, and operates energy and facility projects for public and private owners. Its work is organized into a power infrastructure business, covering firm and renewable generation, battery energy storage, grid integration, and small and micro modular nuclear, and a buildings and public infrastructure business, covering HVAC and indoor air quality, indoor and LED street lighting, water conservation, advanced metering, and EV charging.

Projects run through a single lifecycle: develop, design, finance, construct, and then operate and maintain. Funding structures include energy savings performance contracts, power purchase agreements, PACE, and budget-neutral infrastructure upgrades, and the company contracts as prime contractor on design-build, design-bid-build, and related delivery models. In-house teams handle engineering, architectural and design work, estimating, construction and construction management, quality assurance, and commissioning. The AssetPlanner enterprise asset management platform and an Asset Sustainability Group support capital, maintenance, and net zero planning.

Ameresco states that it has delivered over $15 billion in solutions and contracted more than 5 GW of energy resources since its founding in 2000, and serves public and private sector customers across North America and Europe from a Massachusetts headquarters. It trades on the New York Stock Exchange as AMRC. Named customer segments include industrial and commercial buildings, K-12 schools, public and multifamily housing, and transportation and infrastructure, and the company bids federal work.

Scope, financing structure, and measured savings guarantees differ by project, so the specific contract vehicle and the terms of any performance guarantee are worth confirming directly with the company.

Best for

Public agencies, school districts, housing authorities, and industrial and commercial owners planning large energy retrofits, on-site generation, or infrastructure upgrades funded through performance contracts, power purchase agreements, or PACE.

What they do

  • Energy savings performance contracts (ESPC)
  • Power purchase agreements
  • PACE (Property Assessed Clean Energy) funding
  • Battery energy storage systems
  • Biogas and renewable natural gas projects
  • LED street, area, and indoor lighting upgrades
  • EV charging infrastructure
  • HVAC and indoor air quality upgrades
  • AssetPlanner enterprise asset management software
  • Design-build engineering and construction

Details

AttributeValue
Founded2000
OwnershipPublic

What stands out

  • Reports delivering over $15 billion in solutions and contracting more than 5 GW of energy resources since its founding in 2000.
  • Listed on the New York Stock Exchange under the ticker AMRC.
  • Serves public and private sector customers across North America and Europe.
  • Self-performs engineering, procurement, construction management, quality assurance, and commissioning in house.
  • Listed by Solar Power World among its Top Solar Contractors for 2026.