See this resource below put together by Appalachian Voices in which you can search for utility-sponsored rebate programs for homes (and businesses) to improve energy efficiency:
I conducted a quick search for programs in a rural community in Halifax County (NC) and found a nice range of options for homeowners even where the utility does not have a rebate program. In this example, there are three utilities in the area, two of which do not provide a program for homeowners. In both of those cases, however, there is a list of resources on the sidebar which homeowners may explore, such as availability of discounted LED or CFL lightbulbs and appliance recycling programs.The utility that does have programs for homeowners are listed with a brief description, and active links to the utility’s program website.
Be sure to check Appalachian Voices’ main Energy Savings page for background information and listing of resources and programs targeting energy efficiency, which equates to residents stretching out their income beyond utility bills.