Solar panels in Joplin, MO
Roofs in Joplin get about 1,591 hours of usable sunlight a year — more than 56% 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 Joplin → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.
What a typical Joplin solar system costs
A 20-panel system (8 kW) is about right for an average Joplin home using 10,800 kWh a year. It would produce roughly 10,819 kWh annually and offset 100% of that usage.
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 4,328 | $6,384 | $528 | 12.1 yrs |
| 12 panels | 4.8 kW | 6,491 | $9,576 | $792 | 12.1 yrs |
| 16 panels | 6.4 kW | 8,655 | $12,768 | $1,056 | 12.1 yrs |
| 20 panels | 8 kW | 10,819 | $15,960 | $1,318 | 12.1 yrs |
| 26 panels | 10.4 kW | 14,064 | $20,748 | $1,417 | 14.6 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 Joplin gets 1,591 sun hours
That figure comes from Google's analysis of real rooftops across Joplin — 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 Joplin reaches about 1,695 hours, roughly 7% better than typical.
The numbers behind this page
| Typical usable sunlight | 1,591 hrs/yr |
|---|---|
| Unshaded roof | 1,695 hrs/yr |
| Electricity rate (Missouri avg) | 12.2¢/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 | 13 |
| Google imagery from | 2022 |
When Joplin actually produces
Annual totals hide the thing that catches people out: 35% of Joplin's yearly sunlight arrives in May–July, and just 14% across November–January.
| Month | Sun hrs | Share of year |
|---|---|---|
| Jan | 77 | |
| Feb | 100 | |
| Mar | 130 | |
| Apr | 160 | |
| May | 181 | |
| Jun | 189 | |
| Jul | 184 | |
| Aug | 168 | |
| Sep | 141 | |
| Oct | 109 | |
| Nov | 82 | |
| Dec | 70 |
Joplin produces about 2.7× as much in Jun as in Dec — a normal mid-latitude swing. Expect real winter shortfall and summer surplus rather than steady year-round output.
The annual total is measured from Google's rooftop imagery. Its split across months is calculated from solar geometry at Joplin's latitude, not separately measured, so treat the monthly figures as the shape of a typical year rather than a forecast.
How Joplin compares to the other 673 cities
| Measure | Joplin | Rank of 673 |
|---|---|---|
| Usable sunlight | 1,591 hrs | 293rd |
| Sunlight lost to shade | 6% | 258th most |
| Median roof size | 237 m² | 253rd largest |
| Electricity rate | 12.2¢ | 569th highest |
| Payback | 12.1 yrs | 499th fastest |
| Grid carbon | 892 kg/MWh | 25th dirtiest |
What actually stands out about Joplin:
- Plenty of roof to work with. Typical roofs here fit around 96 panels — roughly 4× what an average home needs. Roof size will not be what limits your system in Joplin.
- Every kWh counts more here. The grid serving Joplin emits 892 kg CO₂ per MWh, among the highest of the 673 cities measured — so the same panels displace more emissions than they would elsewhere.
Cities with almost the same sunlight
These are the closest matches to Joplin's 1,591 usable sun hours from other states and provinces. Same sunlight, different electricity prices — which is usually what decides whether solar is worth it.
| City | Sun hrs | Rate | Payback |
|---|---|---|---|
| Iowa City, IA | 1,591 | 13.2¢ | 11.2 yrs |
| Sheridan, WY | 1,591 | 12.1¢ | 12.2 yrs |
| Overland Park, KS | 1,592 | 14.1¢ | 10.5 yrs |
| Myrtle Beach, SC | 1,589 | 14.2¢ | 10.4 yrs |
Nearby cities
See all of Missouri → statewide sunlight, rates, incentives and every city we've measured.
Joplin solar questions
How many solar panels do I need in Joplin?
About 20 panels for an average home using 10,800 kWh a year. Joplin roofs get 1,591 usable sun hours, so each 400W panel produces roughly 541 kWh annually. A typical Joplin roof fits about 96 panels, so roof space is unlikely to be your limit.
Is solar worth it in Joplin?
At 12.2¢/kWh and 1,591 sun hours, a typical system pays for itself in about 12.1 years and returns roughly $16,994 over a 25-year panel life. That is slower than average, so compare several quotes before committing. Exported power earns full retail credit here.
How much do solar panels cost in Joplin?
A 8 kW system costs about $22,800 before incentives and $15,960 after the 30% federal tax credit. That works out near $2.85 per watt installed. Roof pitch, shading, electrical panel upgrades and equipment choice move the price most, which is why quotes for the same house can differ by thousands.
Worth reading before you buy
Estimates only, generated 2026-08-22 from Google Solar API rooftop samples and average Missouri 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.