Reports
Annual Reports
Read about our results, program strategies, and success stories.
- 2024 Efficiency Maine Annual Report – FY2024 Summary
- 2023 Efficiency Maine Annual Report
- 2022 Efficiency Maine Annual Report
- 2021 Efficiency Maine Annual Report
- 2020 Efficiency Maine Annual Report
- 2019 Efficiency Maine Annual Report
- 2018 Efficiency Maine Annual Report
- 2017 Efficiency Maine Annual Report
- 2016 Efficiency Maine Annual Report
- 2015 Efficiency Maine Annual Report – FY 2015 by the Numbers Infographic
- 2014 Efficiency Maine Annual Report
- 2013 Efficiency Maine Annual Report
- 2013 Year in Review
- 2012 Efficiency Maine Annual Report
- 2012 Year In Review
- 2011 Efficiency Maine Annual Report
- 2011 Year in Review
- 2010 Efficiency Maine Annual Report
Program Evaluations
Efficiency Maine’s Research and Evaluation strategy provides data-driven research and analysis to inform program delivery, verify program results and ensure ongoing program and organizational improvement.
Residential Evaluations:
- Residential Heat Pump Impact Evaluation Report (2024)
- Retail and Distributor Lighting – Final Impact Evaluation Report (2021)
- Heat Pump Water Heater Evaluation (2020)
- Home Energy Savings Program Impact Evaluation (2019)
- LED Lighting Pricing Trial (2017)
- Low-Income Multifamily — Final Evaluation Report (2016)
- Retail Lighting Program — Final Evaluation Report (2015)
- Appliance Rebate Program — Final Evaluation Report (2014)
- Residential Direct Install — Final Evaluation Report (2013)
- PACE Loan Program — Final Evaluation Report (2013)
- PACE Loan Program — Interim Impact Report (2013)
- Residential Lighting Program Evaluation (2012)
- PACE Loan Program — Interim Process Report (2012)
- PACE Loan Program — Review of Successful Practices (2012)
- Home Energy Savings Program (2011)
- Low Income Appliance Replacement Program (2007)
- Residential Lighting Program (2007)
Business Program Evaluations:
- Commercial and Industrial Custom Impact Evaluation (2024)
- Commercial and Industrial Heat Pump Impact Evaluation (2023)
- Small Business Initiative – Final Impact Evaluation Report (2021)
- Business Incentive Program Impact Evaluation Final Report (2018)
- Large Customer Program Evaluation (2017)
- Business Incentive Program Process Evaluation (2016)
- Retro-Commissioning Pilot Program Evaluation (2012)
- Commercial Projects Grant Program (2012)
- Large Projects Grant Program (2012)
- Business Incentive Program (2011)
- Building Operator Certification Program (2005)
Multifamily Evaluations:
Legislative Reports
- Beneficial Electrification Planning Report (2025)
- Vehicle-to-Grid Pilot Assessment (2024)
- Agricultural Fair Assistance Program – Final Report (2024)
- Agricultural Fair Assistance Program – Interim Report (2022)
- Refrigerant Leakage Assessment (2022)
- Beneficial Electrification Study (2020)
- Study of Options for a State Demand Response Program (2016)
- Energy Efficient Heating Options Report (2013)
- Heating Fuels Efficiency and Weatherization Fund Report (2010)
- Regional Greenhouse Gas Initiative 2020 Annual Report
- Regional Greenhouse Gas Initiative 2019 Annual Report
- Regional Greenhouse Gas Initiative 2018 Annual Report
- Regional Greenhouse Gas Initiative 2017 Annual Report
- Regional Greenhouse Gas Initiative 2016 Annual Report
- Regional Greenhouse Gas Initiative 2015 Annual Report
- Regional Greenhouse Gas Initiative 2014 Annual Report
- Regional Greenhouse Gas Initiative 2013 Annual Report
Studies
- Maine Residential Baseline 2024 (2024)
- Integrated Controls Pilot Study (2022)
- Whole Home Heat Pump Study (2021)
- Memorandum on New Construction HVAC Pricing (2021)
- Maine New Construction Baseline Assessment (2021)
- Residential DER Load Management Innovation Pilot Report (2021)
- Residential Level 2 Electric Vehicle Charging Baseline Study (2021)
- Heat Pump Water Heater Free-ridership and Baseline Assessment (2020)
- Commercial Building Interval Meter Data Analytics Study (2015)
- Residential Baseline Study (2015)
- Natural Gas Potential Study (2014)
- EMT Baseline Opportunities Study (2012)
- Maine Residential New Construction Technical Baseline Study (2008)
Other Resources
To request a hard copy/printed version of any of the PDF documents listed above, please call 1-866-376-2463. Please allow 10 days for delivery from the time of request.