Energy-efficiency loan financing is proving to be a stable, low-risk investment with low default rates and large-scale potential, according to a study released by the American Council for an Energy-Efficient Economy (ACEEE), “What Have We Learned From Energy Efficiency Financing Programs?” A review of 24 energy-efficiency loan programs finds extremely low default rates ranging from 0-3 percent throughout the life of the financing program. Default rates for efficiency loan programs have also remained largely unchanged, even during the near collapse of the real estate market over the past few years.

“Energy-efficiency loans are proving to be a winning investment in a time of economic uncertainty. Based on these findings, now is the time to scale-up to serve many more homeowners and businesses,” said Steven Nadel, ACEEE executive director.

Energy-efficiency loan programs finance building upgrades by providing funding directly to building owners or managers. These projects lower energy bills and reduce annual energy costs by an average of 12-17 percent, said the study. Small commercial banks and credit unions have led in offering these energy-efficiency loan products, often working with utilities as well as local and state governments. The programs evaluated by the ACEEE report have loaned out over $1.5 billion. Through the use of subsidies and energy program funds, interest rates for borrowers averaged 3-5 percent annually.