Authorizes a tax credit for certain solar property expenditures

HB 3337 creates a state tax credit for Missouri homeowners who install qualifying solar energy systems, such as solar panels and inverters, that also qualify for the federal tax credit. It allows eligible homeowners to claim a credit equal to 30% of their solar installation costs from 2027-2032, increasing to 35% in 2033 and 40% from 2034 onward. The credit is refundable (meaning it can generate a cash refund if it exceeds tax liability) but cannot be sold or transferred. The program expires on December 31, 2038, unless the Missouri legislature reauthorizes it.