Bottom Line on Public-Private Finance Tools for Energy Efficiency

This guide by the World Resources Institute outlines five public-private financing mechanisms designed to overcome capital barriers for energy efficiency investments: on-bill financing, Commercial Property Assessed Clean Energy (PACE) financing, Sustainable Energy Utility (SEU) models, loan guarantees, and loan loss reserve funds (LLRFs).

• On-bill financing allows energy efficiency loans to be repaid via a utility bill line item, reducing lender risk. In 'classic' models, the utility is the lender, while hybrid models pool public and private funds. Loans are typically repaid over 2–5 years. An example is the Connecticut Energy Efficiency Fund’s Small Business Energy Advantage Program, where over 25% of United Illuminating's small business customers participated.
• Commercial Property Assessed Clean Energy (PACE) financing secures loans with a tax lien on a property, which lowers interest rates and repayment risk. Loans are paid back through property tax bills over 5–20 years. To avoid conflicts with mortgage underwriters that halted residential PACE in the U.S., commercial PACE requires property owners to get consent from mortgage holders if the PACE loan has priority repayment.
• A Sustainable Energy Utility (SEU) acts as a 'one stop shop' to facilitate energy efficiency by administering financing, offering technical services, and coordinating banks and Energy Service Companies (ESCOs). Examples include Efficiency Vermont, founded in 2000 and funded by a 'wires charge' on kWh sold, and Delaware's SEU, which can issue tax-exempt bonds and award rebates through a Sustainable Energy Revolving Fund with interest rates of 3.5–5%.
• Loan guarantees and Loan Loss Reserve Funds (LLRFs) reduce risk for banks unfamiliar with energy efficiency technologies. While a loan guarantee relies on the credit of a public agency, an LLRF requires an actual sum of money in an escrow account. The China Utility-Based Energy Efficiency (CHUEE) program, supported by the Global Environment Facility (GEF) and International Finance Corporation (IFC), used a $USD 50 million LLRF to target $USD 0.7-1.45 billion in private sector financing.

APA

World Resources Institute (n.d.). Bottom Line on Public-Private Finance Tools for Energy Efficiency. https://www.wri.org/research/bottom-line-public-private-finance-tools-energy-efficiency

Chicago

World Resources Institute. Bottom Line on Public-Private Finance Tools for Energy Efficiency. n.d. https://www.wri.org/research/bottom-line-public-private-finance-tools-energy-efficiency.

Wikipedia

{{cite report |author=World Resources Institute |title=Bottom Line on Public-Private Finance Tools for Energy Efficiency |url=https://www.wri.org/research/bottom-line-public-private-finance-tools-energy-efficiency |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{worldresourcesinstitutendbottom, author = {{World Resources Institute}}, title = {{Bottom Line on Public-Private Finance Tools for Energy Efficiency}}, institution = {World Resources Institute}, url = {https://www.wri.org/research/bottom-line-public-private-finance-tools-energy-efficiency}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }