Solar Panel Output in Arizona (AZ)
Arizona has some of the best solar potential in the United States. With over 300 sunny days per year and 6-7.5 peak sun hours daily, the state is ideal for off-grid solar systems. The desert climate means consistent production but requires heat management.
Peak Sun Hours (Annual)
6.5
Summer Peak Hours
7.5
Winter Peak Hours
5
Optimal Tilt Angle
33°
Daily Solar Output in Arizona
Expected daily production from common panel sizes in Arizona conditions.
| Panel Size | Summer (Wh/day) | Winter (Wh/day) | Annual Avg (Wh/day) |
|---|---|---|---|
| 100W Panel | 750 | 500 | 625 |
| 200W Panel | 1500 | 1000 | 1250 |
| 400W Panel | 3000 | 2000 | 2500 |
* Based on 6.5 average peak sun hours and 85% system efficiency.
Seasonal Peak Sun Hours
Spring
7 hrs
Summer
7.5 hrs
Fall
6.5 hrs
Winter
5 hrs
Solar Production by City in Arizona
| City | Peak Sun Hours | 100W Daily Output | Notes |
|---|---|---|---|
| Phoenix | 6.8 hrs | 578Wh | One of the sunniest cities in the US |
| Tucson | 6.5 hrs | 553Wh | Slightly cooler than Phoenix, great solar |
| Flagstaff | 5.8 hrs | 493Wh | Higher elevation, cooler temps, some snow |
| Yuma | 7.5 hrs | 638Wh | Highest solar potential in Arizona |
Arizona Climate Considerations
- •Extreme heat reduces panel efficiency by 10-15% in summer
- •Minimal rain means dust accumulation - clean panels monthly
- •Low humidity extends equipment lifespan
- •No snow load concerns for mounting
- ✓Year-round off-grid living
- ✓RV snowbirding
- ✓Desert homesteads
- ✓Maximum solar production
- !Extreme summer heat
- !Dust accumulation
- !Monsoon season clouds
Solar Tips for Arizona
- •Install panels with good ventilation - heat reduces output significantly
- •Consider ground mounting to allow airflow underneath panels
- •Use microinverters or optimizers to handle partial shading from dust
- •Size your system for winter production if year-round power is critical
- •Monsoon season (July-Sept) brings afternoon clouds - morning production is most reliable
Frequently Asked Questions: Solar in Arizona
How much solar power can I generate in Arizona?
Arizona averages 6.5 peak sun hours daily. A 100W panel produces about 625Wh per day on average, or 228 kWh per year. This is 30-40% higher than the national average.
Does Arizona heat hurt solar panel efficiency?
Yes, panels lose about 0.4% efficiency per degree Celsius above 25°C. In Phoenix summers (often 40°C+), expect 10-15% lower output than rated. This is factored into our calculations.
What is the best solar panel angle in Arizona?
For fixed installations, 30-35 degrees matches Arizona latitudes. Steeper angles (40-45°) improve winter production. Flat angles (20-25°) maximize summer output.