New requirements for residential solar companies and salespeople took effect Tuesday, Sept. 1, as Texas begins enforcing a law designed to give homeowners more protections when buying or leasing solar panels.

The new requirements are part of Senate Bill 1036, known as the Residential Solar Retailer Regulatory Act, which Texas lawmakers passed in 2025.

While much of the law took effect Sept. 1, 2025, lawmakers delayed two major portions until Sept. 1, 2026: requirements that residential solar retailers and salespeople register with the state and enforcement provisions allowing regulators to penalize violations.