Federal Financing Programs for Clean Energy (PDF) – The Energy Department has compiled a comprehensive resource guide for federal programs that support the development of clean energy projects in the U.S. and abroad.

The Weatherization Assistance Program (WAP) provides funding to states to help low-income households reduce energy costs by increasing their home’s energy efficiency.

• Preliminary Assessment Guide for Integrating Renewable Energy into Weatherization helps states that receive a WAP grant determine if renewable energy is a fit for their WAP program before embarking on the process outlined in the WAP Memorandum 024.
• WAP Memorandum 024 assists states that receive a WAP grant with applying for approval to include solar as a WAP measure in their annual plans.
• The NREL Solar Savings-to-Investment tool is a calculator that enables states that receive a WAP grant to calculate the cost-effectiveness of a solar system in any state. The tool uses NREL market data on the capital and operating and maintenance costs of solar systems, as well as state-specific solar resource data and electricity rates.
• The Solar Template for Incorporating Solar Photovoltaics into WAP helps to streamline the pilot project application process with DOE.
• Using Federal Energy Assistance Funds for PV to Reduce Energy Burden for Low-income Households and Reducing Energy Burden with Solar: Colorado’s Strategy and Roadmap for States provide additional considerations and case studies for using WAP funds for solar projects.

The Low Income Home Energy Assistance Program (LIHEAP) provides initiatives that assist families with energy costs in order to help keep them safe and healthy. The LIHEAP Residential Energy Assistance Challenge program aims to minimize health and safety risks, prevent homelessness resulting from inability to pay energy bills, and increase low-income families’ energy usage efficiency.

Using Federal Energy Assistance Funds for PV to Reduce Energy Burden for Low-income Households – This report describes considerations for states using LIHEAP funds and captures a few case studies.

Several HUD programs support energy efficiency and solar installations, including Public and Indian Housing, Community Planning and Development, and the Office of Housing’s Multifamily and Single Family programs.

The Community Development Block Grant Program provides communities with resources that address a wide range of community development needs, including solar installations. 

The Energy Efficient Mortgage program enables homeowners to finance energy efficient improvements, like solar, with their FHA-insured mortgage. This program works to make cost-effective energy improvements to lower utility bills and make more income available for the mortgage payment.

HUD’s Energy Performance Contracting financing technique uses cost savings from reduced energy consumption to repay the cost of installing energy conservation measures, allowing users to gain energy savings without capital expenses up front. The 24 CFR 990.185 document details HUD's financial regulations, including energy incentives for the program.

The Internal Revenue Service and the Treasury Department provide regulations concerning submetering of Low Income Housing Tax Credit (LIHTC) utility allowance and clarify when utility costs generated from renewable sources are paid by a building owner or passed on to the tenants.

The Office of the Comptroller of the Currency Community Reinvestment Act provides financial institutions, state and local governments, and community organizations with the framework to jointly promote banking services to all community members. It protects residents of racially defined neighborhoods from denial or increased costs, and encourages meeting needs of residents in low- and moderate-income areas.

The Community Development Financial Institutions Fund’s New Markets Tax Credit incentivizes community development and economic growth through the use of tax credits that attract private investment. See an NREL fact sheet on Denver, CO’s use of this tax credit to spur solar development.

The Rural Energy for America Program provides agricultural producers and rural small businesses with grants for energy audits and renewable energy development assistance.   

The Rural Energy Savings Program helps make affordable loans available to help consumers—including utilities, nonprofits, municipalities, and states—implement cost-effective, energy-saving measures.   

The Energy Efficiency and Conservation Loan Program provides loans to finance energy efficiency and conservation projects, specifically in rural areas.

The Rural Utilities Service administers programs that provide or improve infrastructure to rural communities, including sustainable renewable energy development.

Renewable Energy in Highway Right-of-Way – State Departments of Transportation can use highway right-of-way to accommodate renewable energy technologies like solar power. An interactive map provides a snapshot of existing highway renewable energy projects from around the country.