Solar panels in Johns Creek, GA
Roofs in Johns Creek get about 1,337 hours of usable sunlight a year — less than 92% of the cities we've measured. Here's what that means in cost, savings and payback, using real rooftop data rather than a national average.
Check your specific roof in Johns Creek → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.
What a typical Johns Creek solar system costs
A 24-panel system (9.6 kW) is about right for an average Johns Creek home using 10,800 kWh a year. It would produce roughly 10,910 kWh annually and offset 100% of that usage.
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 3,637 | $6,384 | $513 | 12.5 yrs |
| 12 panels | 4.8 kW | 5,455 | $9,576 | $769 | 12.5 yrs |
| 16 panels | 6.4 kW | 7,273 | $12,768 | $1,026 | 12.5 yrs |
| 20 panels | 8 kW | 9,092 | $15,960 | $1,282 | 12.5 yrs |
| 26 panels | 10.4 kW | 11,819 | $20,748 | $1,559 | 13.3 yrs |
Notice that payback barely improves as systems get bigger, and eventually gets worse. That's because you can only save money on electricity you were going to buy anyway. Once a system covers your usage, extra panels mostly generate exports at a much lower rate.
Why Johns Creek gets 1,337 sun hours
That figure comes from Google's analysis of real rooftops across Johns Creek — it already accounts for shading from trees, chimneys and neighbouring buildings, which is why it's lower than the raw "hours of daylight" figures you'll see elsewhere. An unusually open, unshaded roof in Johns Creek reaches about 1,661 hours, roughly 24% better than typical.
The numbers behind this page
| Typical usable sunlight | 1,337 hrs/yr |
|---|---|
| Unshaded roof | 1,661 hrs/yr |
| Electricity rate (Georgia avg) | 14.1¢/kWh |
| Installed cost assumed | $2.85/W |
| Panel size assumed | 400 W |
| Federal tax credit | 30% |
| Typical household usage | 10,800 kWh/yr |
| Power used as generated | 35% |
| Paid for exported power | full retail (net metering) |
| Rooftops sampled here | 15 |
| Google imagery from | 2023 |
Nearby cities
See all of Georgia → statewide sunlight, rates, incentives and every city we've measured.
Johns Creek solar questions
How many solar panels do I need in Johns Creek?
About 24 panels for an average home. Johns Creek roofs get 1,337 usable sun hours a year, so each 400W panel produces roughly 455 kWh annually.
Is solar worth it in Johns Creek?
At 14.1¢/kWh and 1,337 sun hours, a typical system pays for itself in about 12.5 years and returns roughly $19,015 over 25 years. That is slower than the national average, so compare quotes carefully.
How much do solar panels cost in Johns Creek?
A 9.6 kW system costs about $27,360 before incentives and $19,152 after the 30% federal tax credit. Prices vary by installer, roof complexity and equipment.
Worth reading before you buy
Estimates only, generated 2026-08-22 from Google Solar API rooftop samples and average Georgia electricity rates. Not a quote and not financial advice. Your roof, usage, utility plan and local incentives will change these numbers — get real quotes before buying.