Solar panels in La Grande, OR
Roofs in La Grande get about 1,409 hours of usable sunlight a year — less than 68% 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 La Grande → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.
What a typical La Grande solar system costs
A 23-panel system (9.2 kW) is about right for an average La Grande home using 10,800 kWh a year. It would produce roughly 11,018 kWh annually and offset 100% of that usage.
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 3,832 | $6,384 | $475 | 13.4 yrs |
| 12 panels | 4.8 kW | 5,749 | $9,576 | $713 | 13.4 yrs |
| 16 panels | 6.4 kW | 7,665 | $12,768 | $950 | 13.4 yrs |
| 20 panels | 8 kW | 9,581 | $15,960 | $1,188 | 13.4 yrs |
| 26 panels | 10.4 kW | 12,456 | $20,748 | $1,391 | 14.9 yrs |
How we worked this out for La Grande
Every number on this page comes from these seven steps. Nothing is a national average — the sunlight figure is measured from La Grande rooftops.
| # | Step | Result |
|---|---|---|
| 1 | What one panel makes here 400W ÷ 1000 × 1,409 sun hrs × 0.85 system losses |
479 kWh/yr |
| 2 | Panels needed to cover typical usage 10,800 kWh ÷ 479 kWh per panel |
23 panels |
| 3 | System size 23 panels × 400W |
9.20 kW |
| 4 | Annual production 9.20 kW × 1,409 hrs × 0.85 |
11,018 kWh/yr |
| 5 | Installed cost 9,200 W × $2.85 per watt, then −30% federal credit |
$18,354 |
| 6 | Annual saving 3,780 kWh used as generated × 12.4¢ + 7,238 kWh exported × 12.4¢ |
$1,346/yr |
| 7 | Payback $18,354 ÷ $1,346 per year |
13.6 years |
Step 6 matters more than it looks. Only 34% of what a system this size produces in La Grande is used the moment it is generated; the other 7,238 kWh is exported and credited one-for-one under net metering. Because exports here are credited at or near retail, that split changes the payback very little — 13.4 years against the 13.6 we show. In places where exports pay a fraction of retail the same split moves payback by years, which is why we model it explicitly rather than assuming.
Assumptions: 400W panels, 15% system losses (inverter, wiring, heat, soiling), $2.85/W installed, 10,800 kWh typical annual household use, 12.4¢/kWh electricity. Change any of those and every figure above moves — which is exactly why a single national "solar costs X" number is misleading.
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 La Grande gets 1,409 sun hours
That figure comes from Google's analysis of real rooftops across La Grande — 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 La Grande reaches about 1,578 hours, roughly 12% better than typical.
The numbers behind this page
| Typical usable sunlight | 1,409 hrs/yr |
|---|---|
| Unshaded roof | 1,578 hrs/yr |
| Electricity rate (Oregon avg) | 12.4¢/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 | 15 |
| Google imagery from | 2022 |
When La Grande actually produces
Annual totals hide the thing that catches people out: 38% of La Grande's yearly sunlight arrives in May–July, and just 11% across November–January.
| Month | Sun hrs | Share of year |
|---|---|---|
| Jan | 53 | |
| Feb | 78 | |
| Mar | 111 | |
| Apr | 148 | |
| May | 175 | |
| Jun | 187 | |
| Jul | 181 | |
| Aug | 158 | |
| Sep | 124 | |
| Oct | 88 | |
| Nov | 59 | |
| Dec | 47 |
La Grande produces about 4.0× 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 La Grande's latitude, not separately measured, so treat the monthly figures as the shape of a typical year rather than a forecast.
How La Grande compares to the other 788 cities
| Measure | La Grande | Rank of 788 |
|---|---|---|
| Usable sunlight | 1,409 hrs | 533rd |
| Sunlight lost to shade | 11% | 57th most |
| Median roof size | 176 m² | 453rd largest |
| Electricity rate | 12.4¢ | 663rd highest |
| Payback | 13.6 yrs | 672nd fastest |
| Grid carbon | 696 kg/MWh | 276th dirtiest |
What actually stands out about La Grande:
- Shading is a real problem here. La Grande loses 11% of its potential sunlight to trees, chimneys and neighbouring buildings — the 57th-worst of the 788 cities measured. Panel placement matters more here than in most places, and a roof survey is worth more than a phone quote.
Cities with almost the same sunlight
These are the closest matches to La Grande's 1,409 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 |
|---|---|---|---|
| Bloomington, MN | 1,409 | 14.8¢ | 11.4 yrs |
| Spokane, WA | 1,410 | 11.3¢ | 15 yrs |
| Hartford, CT | 1,408 | 29.2¢ | 5.8 yrs |
| Mansfield, OH | 1,410 | 15.2¢ | 11.1 yrs |
Nearby cities
See all of Oregon → statewide sunlight, rates, incentives and every city we've measured.
La Grande solar questions
How many solar panels do I need in La Grande?
About 23 panels for an average home using 10,800 kWh a year. La Grande roofs get 1,409 usable sun hours, so each 400W panel produces roughly 479 kWh annually. A typical La Grande roof fits about 55 panels, so roof space is unlikely to be your limit.
Is solar worth it in La Grande?
At 12.4¢/kWh and 1,409 sun hours, a typical system pays for itself in about 13.6 years and returns roughly $15,295 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 La Grande?
A 9.2 kW system costs about $26,220 before incentives and $18,354 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 Oregon 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.