South Carolina homeowners who want to add solar power can save by taking advantage of the current federal income tax credit (ITC), a program that allows you to recover up to 26% of the money you’ve invested in your solar panel system. In addition, South Carolina has net metering, a program that gives you full retail credit for excess energy your solar panels feed back into the grid. Utilities must roll over monthly overages into the next month and credit you for any remaining excess energy generation at the end of the year. The state offers tax credits against 25% of the cost of installation, up to $3,500 or 50% of tax liability per year. Some of these programs vary, depending on who supplies your energy.