Solar Panels Cost $11k-$20k in Charleston County, SC | August, 2025

In 2001, Santee Cooper established a Green Power Program allowing residential customers to purchase renewably-sourced energy at $3 for a 100 kWh block. Commercial customers may purchase 200 kWh blocks at $6. Any customer-member of a South Carolina electric cooperative, as well as customers in Georgetown, may participate. Additional information is available through the Santee Cooper website.

New government buildings in South Carolina are subject to green construction requirements. Generally, new occupied state facilities should meet or exceed the standards for LEED Silver certification. Buildings receiving two Green Globes may also meet the standards. By 2020, existing buildings should take measures to cut energy consumption by 20% from a 2000 baseline. Exceptions apply to buildings of certain types, as well as any project where it is determined that project costs would exceed gained energy efficiency. Additional information is available from the South Carolina Energy Office.

Distributed generation and grid interconnection practices have been standardized in South Carolina since 2006. New renewable energy systems in the South Carolina Electric and Gas, Duke Energy, and Progress Energy service areas will be organized into three regulatory tiers based on capacity. A system's tier will determine available permitting processes, fees, review turnaround time, and safety/performance standards. The state requires all interconnected systems to have multiple external disconnect switches. Non-residential system owners are required to carry at least $300,000 of liability insurance on their system.

In South Carolina, tax credits are available for businesses involved in the manufacture of renewable energy equipment. Qualifying equipment includes solar, wind, biomass, geothermal, and a range of other technologies. The maximum available credit is $500,000 per year and $5 million per company. As a condition for receiving the credit, companies are required to invest a minimum amount in new manufacturing facilities, jobs, or other expenses. The required investment will vary from county to county. Additional information is available from the South Carolina Department of Commerce.

Residential Santee Cooper customers may be eligible for special financing on new solar PV, wind, biomass, or energy-efficient water heating projects. Qualifying systems should be installed by a participating contractor and meet the requirements for grid interconnection and net billing. The maximum available principal per loan is $40,000, to be repaid over ten years at a low interest rate. To apply, customers should schedule an energy efficiency audit with a Santee Cooper representative and obtain preapproval for the interconnection of their system. Additional information is available from the Santee Cooper website.

South Carolina homeowners are eligible for tax credits on the equipment and installation expenses of a new renewable energy system or energy-efficient building materials. Qualifying technologies include solar, hydroelectric, and geothermal as used to generate electricity or for heating/cooling. All system components are also eligible for credits. The credit is valued at 25% of costs up to $3,500 per property and $5,000 per taxpayer. To claim the credit, interested homeowners should obtain the proper paperwork from the South Carolina Department of Revenue.