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Energy Efficiency as a Resource 

A foundational principle of utility-sector energy efficiency programs is that the energy they save reduces and offsets the energy otherwise supplied by the electricity grid or natural gas infrastructure. Such saved kWh (electricity) or therms (natural gas) are viable system resources for purposes of utility planning, investment, and operation because energy savings from customer programs can reduce system demand enough to avoid the need for new supply infrastructure, such as generation plants, transmission lines, and distribution system upgrades. Investments in energy efficiency and the resulting resource benefits are factored directly into utility energy resource decision-making about investing in new resources and operating existing systems. 

The origin of utility-sector energy efficiency programs dates back to the energy crises in the 1970s, when a new concept of "energy conservation" emerged to help customers cope with soaring energy prices. Over time, this led to the development of an expanded set of customer energy efficiency programs provided by electric and natural gas utilities.  

Benefits of Energy Efficiency as a Resource 

Energy efficiency has evolved to become recognized as an integral, highly valuable element of utility investments and operations. Utility energy efficiency programs have yielded significant energy and economic benefits to the utility system and to utility customers. Energy efficiency programs have also led to job growth in many fields, including the building trades. 

Energy efficiency today is an important utility system resource, typically the lowest-cost system resource compared to supply-side investments. Saving energy via customer energy efficiency programs generally can be achieved at one-third to one-fourth the cost of fossil-fuel based supply-side alternatives. 

Levelized cost of energy efficiency compared with unsubsidized supply-side resources (Data: ACEEE 2020, Lazard 2020)

Levelized cost of energy efficiency compared with unsubsidized supply-side resources (Data: ACEEE 2020, Lazard 2020) 

Utility-sector energy efficiency programs also yield various other benefits, including greenhouse gas reductions, customer utility bill savings, job creation, and improved air quality.  

Supportive Regulations and Policies  

State regulators of investor-owned utilities (and their counterparts for publicly owned utilities) play a prominent role in setting regulations that support the establishment and implementation of utility-sector energy efficiency programs. Experience has shown that without very direct and supportive regulations and policies, utilities will not develop and offer significant customer energy efficiency programs.  

State policymakers and regulators can provide clear direction to regulated utilities about the importance of energy efficiency by requiring utilities to offer programs and establish supportive business models for these programs. States also can establish specific energy savings targets (typically as a percentage of total energy sales) for regulated utilities. Such energy efficiency resource standards are in place in a large and rapidly growing number of states.  

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