Start with current federal rules
As of this build date, IRS guidance for the One, Big, Beautiful Bill says the Residential Clean Energy Credit is not allowed for expenditures made after December 31, 2025. Do not market a 2026 residential installation as eligible for the former 30% federal credit unless later IRS guidance changes and is cited.
Separate incentive categories
Residential federal tax treatment, commercial clean electricity credits, state programs, utility rebates, net-metering tariffs, battery programs, property-tax treatment, and sales-tax exemptions should be checked separately because each one has its own eligibility rules.
Use careful quote language
A solar quote can flag programs to investigate, but it should not promise that a homeowner or business will receive a credit, rebate, or payback period. Eligibility should be confirmed with official program materials and qualified tax advice.