摘要 : A review of 14 leading energy efficiency program administrators demonstrates that high levels of energy savings are not only achievable but also sustainable. Despite substantial challenges that may limit savings opportunities in t... 展开 A review of 14 leading energy efficiency program administrators demonstrates that high levels of energy savings are not only achievable but also sustainable. Despite substantial challenges that may limit savings opportunities in traditional areas, energy savings have increased from year to year. Average net energy savings levels have doubled for the administrators in this sample, from 0.9% in 2008 to 1.8% in 2014. Utility-sector energy efficiency programs have grown substantially in the past decade. According to the most recent ACEEE State Energy Efficiency Scorecard, electric-efficiency program investments have increased from approximately $1.5 billion in 2006 to over $5.9 billion in 2014. As savings levels have increased, national leaders in program administration have emerged. In this paper we review annual program performance for 14 leading energy efficiency program administrators. We sought diversity in the selection of program administrators and included administrators of varying service-territory size and geographic location. Among the 14 program administrators we reviewed, none achieved electricity savings of 1.5% of retail electric sales in 2009. By 2014, 8 of the 14 were achieving savings higher than 1.5%, with 4 of the 8 saving more than 2%. The data also show that high savings are sustainable over time. We find that as savings rise, levelized costs of energy efficiency remain relatively flat. This paper also seeks to identify the drivers of high savings. State or local policy requirements to meet specific energy-efficient savings goals guide all program administrators in this study. The design of the targets and goals vary, but these policies are critical in driving high levels of savings. 收起