Publications and Resources

Featured Publications

Research Report U1907 - September 18, 2019

Energy efficiency can slash US energy use and greenhouse gas emissions by about 50% by 2050, getting us halfway to our national climate goals. We can achieve almost all these savings, worth more than $700 billion in 2050, by dramatically scaling up government policies and programs. This report...

Research Report U1904 - July 24, 2019

The City Clean Energy Scorecard measures the progress of city policies and programs that save energy, promote renewable energy, and reduce greenhouse gas emissions. It also focuses on efforts to embed equity in policymaking. We ranked 75 large US cities for their energy efficiency and...

Research Report U1902 - February 20, 2019

The lifetime of energy efficiency programs and measures ranges from a few months to several decades. Nevertheless, most energy efficiency policies are designed around the first year of savings. This report describes recent policy changes in some states and Canadian provinces to measure the value...

Research Report - July 24, 2019

The City Clean Energy Scorecard measures the progress of city policies and programs that save energy, promote renewable energy, and reduce greenhouse gas emissions. It also focuses on efforts to embed equity in policymaking. We ranked 75 large US cities for their energy efficiency and...

Testimony - July 24, 2019

The letter expresses ACEEE support for a national energy efficiency resource standard, and is signed by the following organizations: American Council for an Energy-Efficient Economy (ACEEE), Natural Resources Defense Council (NRDC), The International Association of Heat and Frost Insulators and...

Topic Brief - July 05, 2019

States invest in energy efficiency largely because it is a low-cost resource that can displace the need for traditional supply-side investments including electricity generation and transmission and distribution (T&D). Regulators and utilities account for costs and benefits using cost-...

Regulatory Filing - July 01, 2019

The comments were delivered in reference to Case 18-M-0084: In the Matter of a Comprehensive Energy Efficiency Initiative. 

Topic Brief - May 29, 2019

This is the sixth in a series of technical briefs exploring emerging opportunities for energy efficiency in residential and commercial buildings. This brief looks at indoor agriculture, also known as controlled environment agriculture (CEA). In CEA, a range of high-value crops including lettuces...

Topic Brief - May 29, 2019

This is the fifth in a series of technical briefs exploring emerging opportunities for energy efficiency in residential and commercial buildings. This brief focuses on efficiency programs that promote both electricity and natural gas savings in US homes. It highlights technologies that can...

Policy Brief - May 13, 2019

Twenty-seven states are currently implementing long-term (3+ years), binding energy savings targets. States have taken a variety of approaches to setting targets, including passing legislation to enact formal energy efficiency resource standards, setting long-term energy savings targets through...

Fact Sheet - May 07, 2019

Description of utility-sector energy efficiency opportunities in Florida, using data from ACEEE’s most recent State, City, and Utility Energy Efficiency Scorecards, EIA 861 2015, and Florida Energy Efficiency and Conservation Act reports and proceedings.

Fact Sheet - May 02, 2019

The electric power sector is undergoing rapid transformation, in part because of the increased use of technologies that can be located closer to the customer, such as solar power, energy storage, and electric vehicles. Because of its reliability and low cost, energy efficiency can help scale up...

Fact Sheet - May 02, 2019

Improving the energy efficiency of rural homes, businesses, and institutions keeps hard-earned money in community members’ pockets. However, programs to provide efficiency upgrades often require upfront investments, which may be a barrier for some rural community members. Utilities, state and...

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