Solar panels in Grand Junction, CO
Roofs in Grand Junction get about 1,857 hours of usable sunlight a year — more than 85% 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 Grand Junction → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.
What a typical Grand Junction solar system costs
A 18-panel system (7.2 kW) is about right for an average Grand Junction home using 10,800 kWh a year. It would produce roughly 11,365 kWh annually and offset 100% of that usage.
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 5,051 | $6,384 | $748 | 8.5 yrs |
| 12 panels | 4.8 kW | 7,577 | $9,576 | $1,121 | 8.5 yrs |
| 16 panels | 6.4 kW | 10,102 | $12,768 | $1,495 | 8.5 yrs |
| 20 panels | 8 kW | 12,628 | $15,960 | $1,666 | 9.6 yrs |
| 26 panels | 10.4 kW | 16,416 | $20,748 | $1,806 | 11.5 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 Grand Junction gets 1,857 sun hours
That figure comes from Google's analysis of real rooftops across Grand Junction — 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 Grand Junction reaches about 1,962 hours, roughly 6% better than typical.
The numbers behind this page
| Typical usable sunlight | 1,857 hrs/yr |
|---|---|
| Unshaded roof | 1,962 hrs/yr |
| Electricity rate (Colorado avg) | 14.8¢/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 | 33% |
| Paid for exported power | full retail (net metering) |
| Rooftops sampled here | 10 |
| Google imagery from | 2023 |
When Grand Junction actually produces
Annual totals hide the thing that catches people out: 36% of Grand Junction's yearly sunlight arrives in May–July, and just 14% across November–January.
| Month | Sun hrs | Share of year |
|---|---|---|
| Jan | 85 | |
| Feb | 114 | |
| Mar | 151 | |
| Apr | 189 | |
| May | 215 | |
| Jun | 226 | |
| Jul | 220 | |
| Aug | 199 | |
| Sep | 164 | |
| Oct | 125 | |
| Nov | 92 | |
| Dec | 78 |
Grand Junction produces about 2.9× 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 Grand Junction's latitude, not separately measured, so treat the monthly figures as the shape of a typical year rather than a forecast.
How Grand Junction compares to the other 673 cities
| Measure | Grand Junction | Rank of 673 |
|---|---|---|
| Usable sunlight | 1,857 hrs | 100th |
| Sunlight lost to shade | 5% | 333rd most |
| Median roof size | 218 m² | 297th largest |
| Electricity rate | 14.8¢ | 426th highest |
| Payback | 8.9 yrs | 236th fastest |
| Grid carbon | 770 kg/MWh | 182nd dirtiest |
What actually stands out about Grand Junction:
- Sunnier than the rest of Colorado. Grand Junction roofs get 6% more usable sunlight than the typical Colorado city we've measured — statewide averages will understate what you can expect here.
Cities with almost the same sunlight
These are the closest matches to Grand Junction's 1,857 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 |
|---|---|---|---|
| Visalia, CA | 1,855 | 31.2¢ | 8.7 yrs |
| Lawton, OK | 1,863 | 12.1¢ | 10.8 yrs |
| Salinas, CA | 1,850 | 31.2¢ | 8.7 yrs |
| Wichita Falls, TX | 1,850 | 15.1¢ | 8.7 yrs |
Nearby cities
See all of Colorado → statewide sunlight, rates, incentives and every city we've measured.
Grand Junction solar questions
How many solar panels do I need in Grand Junction?
About 18 panels for an average home using 10,800 kWh a year. Grand Junction roofs get 1,857 usable sun hours, so each 400W panel produces roughly 631 kWh annually. A typical Grand Junction roof fits about 70 panels, so roof space is unlikely to be your limit.
Is solar worth it in Grand Junction?
At 14.8¢/kWh and 1,857 sun hours, a typical system pays for itself in about 8.9 years and returns roughly $26,118 over a 25-year panel life. That is a solid return, and it improves further if electricity prices rise. Exported power earns full retail credit here.
How much do solar panels cost in Grand Junction?
A 7.2 kW system costs about $20,520 before incentives and $14,364 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 Colorado 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.