Federal Solar Grants: These grants help cover installation costs for solar energy systems and do not require repayment, making solar more accessible. Eligibility: Targeted towards low-income homeowners, farms, nonprofits, schools, and rural residents. Preliminary Assessment Guide for Integrating Renewable Energy into Weatherization helps states that receive a WAP grant determine if. . Whether you're a low-income homeowner or a rural resident, there are plenty of grants and funding options in 2025 to make solar energy accessible, affordable, and efficient. Cost Savings: Grants can significantly reduce. .