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ERS is a DNV company

Energy Efficiency


ERS is a leading engineering firm with the objective of assisting utilities, government, and large commercial and industrial end users to solve complex energy and resource problems in a cost-effective manner.

We have the expertise to support our clients' goals of implementing more efficient approaches to facility energy systems, managing and reducing overall energy costs, planning and enhancing the delivery of efficiency programs, or designing and assessing new construction projects or existing-facility upgrades.

We help our clients to look at things differently, think more creatively, seek effective alternatives, and act wholeheartedly in implementing technically and economically beneficial measures.

Our Services, Tools & Solutions

Energy Program Evaluation

Energy Program Evaluation

ERS is a quantitively motivated firm that provides defensible program impact studies through measurement-driven evaluations.

Engineering & Technical Assistance

Engineering & Technical Assistance

ERS has a broad range of expertise to help implement more effective and efficient energy systems and optimize participation in incentive programs.

Outreach & Implementation

Outreach & Implementation

ERS has considerable experience in program outreach, development, and, administration, implementation, quality control, and monitoring.

Renewable Energy, Electrification, & Distributed Generation

Renewable Energy, Electrification & Distributed Generation

ERS is a recognized subject matter expert in renewable energy and distributed generation technology.

Tools & Solutions

ERS's suite of tools support organizations across the energy industry to make more knowledgeable decisions and better visualize operational strategies.

A Sample of Our Projects

C-PACE Program Administrator

Efficiency Maine Large Customer

Behind-the-Meter Battery Storage

Silicon Valley Power

Portfolio Evaluation


CHP Customer Outreach

Cannabis Energy Studies

Energy Code Compliance Studies

Measurement and Verification

Learn More About ERS

At ERS, energy efficiency is our passion. We are continually leveraging existing and emerging core competencies to empower the energy efficiency industry to build better programs.

We started this business as a way to make a difference, and today we use our experience as thinkers and doers to make a difference leading our clients toward sustainable practices.

Contact us to learn more about the services ERS can offer you.