Solar panels in Kalispell, MT
Roofs in Kalispell get about 1,368 hours of usable sunlight a year — less than 86% 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 Kalispell → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.
What a typical Kalispell solar system costs
A 24-panel system (9.6 kW) is about right for an average Kalispell home using 10,800 kWh a year. It would produce roughly 11,163 kWh annually and offset 100% of that usage.
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 3,721 | $6,384 | $450 | 14.2 yrs |
| 12 panels | 4.8 kW | 5,581 | $9,576 | $675 | 14.2 yrs |
| 16 panels | 6.4 kW | 7,442 | $12,768 | $900 | 14.2 yrs |
| 20 panels | 8 kW | 9,302 | $15,960 | $1,126 | 14.2 yrs |
| 26 panels | 10.4 kW | 12,093 | $20,748 | $1,346 | 15.4 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 Kalispell gets 1,368 sun hours
That figure comes from Google's analysis of real rooftops across Kalispell — 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 Kalispell reaches about 1,433 hours, roughly 5% better than typical.
The numbers behind this page
| Typical usable sunlight | 1,368 hrs/yr |
|---|---|
| Unshaded roof | 1,433 hrs/yr |
| Electricity rate (Montana avg) | 12.1¢/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 | 34% |
| Paid for exported power | full retail (net metering) |
| Rooftops sampled here | 13 |
| Google imagery from | 2022 |
When Kalispell actually produces
Annual totals hide the thing that catches people out: 40% of Kalispell's yearly sunlight arrives in May–July, and just 10% across November–January.
| Month | Sun hrs | Share of year |
|---|---|---|
| Jan | 46 | |
| Feb | 71 | |
| Mar | 106 | |
| Apr | 146 | |
| May | 176 | |
| Jun | 189 | |
| Jul | 182 | |
| Aug | 157 | |
| Sep | 120 | |
| Oct | 82 | |
| Nov | 52 | |
| Dec | 40 |
That is a severe seasonal swing — Kalispell produces roughly 4.8× as much in Jun as in Dec. A system sized to cover your annual usage will overproduce badly in summer and fall well short in winter, so how your utility credits exported power matters more here than in most places.
The annual total is measured from Google's rooftop imagery. Its split across months is calculated from solar geometry at Kalispell's latitude, not separately measured, so treat the monthly figures as the shape of a typical year rather than a forecast.
How Kalispell compares to the other 673 cities
| Measure | Kalispell | Rank of 673 |
|---|---|---|
| Usable sunlight | 1,368 hrs | 582nd |
| Sunlight lost to shade | 5% | 406th most |
| Median roof size | 228 m² | 272nd largest |
| Electricity rate | 12.1¢ | 604th highest |
| Payback | 14.5 yrs | 594th fastest |
| Grid carbon | 696 kg/MWh | 259th dirtiest |
What actually stands out about Kalispell:
- Dimmer than the rest of Montana. Kalispell roofs get 9% less usable sunlight than the typical Montana city we've measured — statewide averages will overstate what you can expect here.
- Cheap electricity is the headwind. Montana power costs about 12.1¢/kWh. Low rates are good news generally, but they lengthen solar payback — there is simply less bill to displace.
Cities with almost the same sunlight
These are the closest matches to Kalispell's 1,368 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 |
|---|---|---|---|
| Longueuil, QC | 1,367 | 7.9¢ | 31.8 yrs |
| Toronto, ON | 1,366 | 15.2¢ | 16.5 yrs |
| Rochester, NY | 1,365 | 24.3¢ | 7.2 yrs |
| Utica, NY | 1,371 | 24.3¢ | 7.2 yrs |
Nearby cities
See all of Montana → statewide sunlight, rates, incentives and every city we've measured.
Kalispell solar questions
How many solar panels do I need in Kalispell?
About 24 panels for an average home using 10,800 kWh a year. Kalispell roofs get 1,368 usable sun hours, so each 400W panel produces roughly 465 kWh annually. A typical Kalispell roof fits about 80 panels, so roof space is unlikely to be your limit.
Is solar worth it in Kalispell?
At 12.1¢/kWh and 1,368 sun hours, a typical system pays for itself in about 14.5 years and returns roughly $13,792 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 Kalispell?
A 9.6 kW system costs about $27,360 before incentives and $19,152 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 Montana 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.