Solar panels in Missouri
Roofs across Missouri get about 1,575 hours of usable sunlight a year, and electricity costs 12.2¢/kWh. That combination puts a typical system's payback at 12.6 years. Here's the detail, from real rooftop data across 11 Missouri cities.
Check your own roof in Missouri → These are regional figures; your roof's size, pitch and shading move them a lot.
How Missouri compares
Missouri gets more sunlight than 61% of the cities we measure, and its electricity costs more than 16% 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 Missouri
| City | Sun hrs/yr | Panels | Net cost | Payback |
|---|---|---|---|---|
| Lee's Summit | 1,668 | 20 | $15,960 | 12 yrs |
| Jefferson City | 1,592 | 20 | $15,960 | 12.1 yrs |
| Springfield | 1,591 | 20 | $15,960 | 12.1 yrs |
| Joplin | 1,591 | 20 | $15,960 | 12.1 yrs |
| Cape Girardeau | 1,586 | 21 | $16,758 | 12.6 yrs |
| Saint Joseph | 1,575 | 21 | $16,758 | 12.6 yrs |
| O'Fallon | 1,542 | 21 | $16,758 | 12.7 yrs |
| Kansas City | 1,531 | 21 | $16,758 | 12.7 yrs |
| Columbia | 1,523 | 21 | $16,758 | 12.7 yrs |
| St. Louis | 1,522 | 21 | $16,758 | 12.7 yrs |
| Independence | 1,405 | 23 | $18,354 | 13.9 yrs |
What a system costs in Missouri
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 4,284 | $6,384 | $523 | 12.2 yrs |
| 12 panels | 4.8 kW | 6,426 | $9,576 | $784 | 12.2 yrs |
| 16 panels | 6.4 kW | 8,568 | $12,768 | $1,045 | 12.2 yrs |
| 20 panels | 8 kW | 10,710 | $15,960 | $1,307 | 12.2 yrs |
| 26 panels | 10.4 kW | 13,923 | $20,748 | $1,413 | 14.7 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.
Missouri 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 $23,940 system that is $7,182 back. How the credit works →
State, utility and municipal incentives stack on top and change often — Missouri 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.
Missouri solar questions
Is solar worth it in Missouri?
At 12.2¢/kWh and 1,575 usable sun hours, a typical Missouri system pays back in about 12.6 years and returns roughly $16,522 across a 25-year panel life. That is slower than average, so compare at least three quotes before committing. Individual cities in Missouri vary widely around this average.
How many solar panels do I need in Missouri?
About 21 panels for a home using 10,800 kWh a year. Each 400W panel produces roughly 536 kWh annually at Missouri sunlight levels. Your own figure depends on actual usage — pull a year of bills rather than assuming average consumption, since heating and EV charging change it a lot.
How much do solar panels cost in Missouri?
A 8.4 kW system runs about $23,940 before incentives and $16,758 after the 30% federal credit, or roughly $2.85 per watt installed. Quotes vary widely by installer, roof complexity and whether your electrical panel needs upgrading — get three before deciding.
Worth reading before you buy
Regional estimates generated 2026-08-22 from Google Solar API rooftop samples across 11 Missouri cities, and average Missouri electricity rates. Not a quote and not financial or tax advice.