Solar panels in South Carolina
Roofs across South Carolina get about 1,624 hours of usable sunlight a year, and electricity costs 14.2¢/kWh. That combination puts a typical system's payback at 10.3 years. Here's the detail, from real rooftop data across 4 South Carolina cities.
Check your own roof in South Carolina → These are regional figures; your roof's size, pitch and shading move them a lot.
How South Carolina compares
South Carolina gets more sunlight than 65% of the cities we measure, and its electricity costs more than 39% of states and provinces. Both matter, but not equally: the electricity rate usually matters more, because solar saves money by replacing power you would otherwise buy. A sunny state with cheap power often pays back slower than a cloudy state with expensive power. Why that happens →
Solar by city in South Carolina
| City | Sun hrs/yr | Panels | Net cost | Payback |
|---|---|---|---|---|
| Charleston | 1,670 | 20 | $15,960 | 10.3 yrs |
| Columbia | 1,624 | 20 | $15,960 | 10.3 yrs |
| Myrtle Beach | 1,589 | 20 | $15,960 | 10.4 yrs |
| Greenville | 1,418 | 23 | $18,354 | 11.9 yrs |
What a system costs in South Carolina
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 4,417 | $6,384 | $627 | 10.2 yrs |
| 12 panels | 4.8 kW | 6,626 | $9,576 | $941 | 10.2 yrs |
| 16 panels | 6.4 kW | 8,835 | $12,768 | $1,255 | 10.2 yrs |
| 20 panels | 8 kW | 11,043 | $15,960 | $1,542 | 10.3 yrs |
| 26 panels | 10.4 kW | 14,356 | $20,748 | $1,660 | 12.5 yrs |
Payback stops improving as systems grow, then gets worse. You can only save on electricity you were going to buy, so once a system covers your usage the extra panels mostly export at a lower rate.
South Carolina solar incentives
Every US household can claim the 30% federal residential clean energy credit, which is what the "after credit" figures above assume. On a $22,800 system that is $6,840 back. How the credit works →
State, utility and municipal incentives stack on top and change often — South Carolina may offer rebates, property or sales tax exemptions, or performance payments. We deliberately don't list specific state programmes here because they change several times a year and stale numbers are worse than none. The DSIRE database is the standard reference and is kept current.
South Carolina solar questions
Is solar worth it in South Carolina?
At 14.2¢/kWh and 1,624 usable sun hours, a typical system pays back in about 10.3 years and returns roughly $22,596 over 25 years. That is slower than average, so compare quotes carefully.
How many solar panels do I need in South Carolina?
About 20 panels for a home using 10,800 kWh a year. Each 400W panel produces roughly 552 kWh annually at South Carolina sunlight levels.
How much do solar panels cost in South Carolina?
A 8 kW system runs about $22,800 before incentives and $15,960 after the 30% federal credit. Quotes vary widely by installer and roof complexity — get three.
Worth reading before you buy
Regional estimates generated 2026-08-22 from Google Solar API rooftop samples across 4 South Carolina cities, and average South Carolina electricity rates. Not a quote and not financial or tax advice.