Solar panels are increasingly more common across Scottsdale and Phoenix and with good reason.
They reduce electricity bills, support sustainable goals, and may increase home value. However the intense Arizona climate and desert environment can also create hidden risks that many homeowners may not realize..
Understanding the risks to your solar panels and how to protect them can help you avoid costly surprises down the road.
Common Risks for Solar Panels in Desert Climates
1. Heat
The Arizona heat can cause myriad problems for your home.
Normally, solar panels are rated under standard test conditions (often ~25 °C / 77 °F). When panels operate under much higher ambient temperatures, their efficiency drops. Materials expand and contract daily, which can fatigue solder joints, frame hardware, and internal connections. Over time, repeated thermal cycling can lead to micro-cracks, increased series resistance, and other degradation.
In one case study in Phoenix, the degradation rate was ~2.3% per year. That was more than double the typical manufacturer estimates of 0.5% to 1% in more moderate climates. Encapsulation browning and solder bond fatigue were leading causes of degradation.
2. Dust and Reduced Washing
Desert dust, pollen, bird droppings, and sticky residues tend to accumulate quickly, especially because natural rainfall in the Phoenix area seldom removes all deposits. Studies on desert climates show that panels left dirty for three months had up to 13% power loss versus those cleaned daily. By comparison, cleaning every two weeks reduced power losses to about 4%.
3. UV Exposure
Intense UV radiation degrades plastics, coatings, and the encapsulant that seals solar cells. Browning can block or scatter light before it reaches cells, lowering performance. Over decades, this phenomenon contributes to solar panels losing output loss.
4. Weather-Related Damage
Monsoons, hail, and wind-borne debris (“haboobs”) can damage solar panels in a number of ways. (Though, solar panels are far from the only home systems that can take a beating in the Arizona climate.) Even when visible damage is minimal, wiring or bypass diodes may be compromised.
5. Uneven Cell Performance
All of these hidden risks to solar panels have a compounding effect. When taken together, they can cause parts of a panel or even some cells in the array to heat more than others. These “hotspots” reduce lifespan and can lead to accelerated failure or safety hazards if not noted early.
Monitoring and Maintaining Solar Panels
To protect solar investment and maintain output over time, consider adopting the following practices.
| Practice | What It Detects or Prevents | How Often / When to Do It |
| Visual inspection | Cracks, chips, loose hardware, corrosion | Annually or after severe storm; more frequent in high-dust periods |
| Infrared / Thermal imaging | Hotspots, failing interconnects, shading effects | At least once a year; after extreme heat waves or suspected performance drop |
| Electroluminescence imaging | Microcracks, cell defects, poor soldering or diode issues invisible to naked eye | During due diligence before buying or selling; when warranty or output claims are in question |
| Performance monitoring | Detects declines, dips, or trends in power output vs what system should produce | Continuous (if possible) or periodic check—monthly / seasonally |
| Regular cleaning schedule | Removes dust, pollen, debris, maintains light penetration | Every 1-3 months during dry season; after large dust events; adjust frequency based on observed soiling and output loss |
| Hardware maintenance | Ensures mounts, clamps, bolts, wiring, frames remain secure; prevents moisture ingress | Annually; inspect after storms or high wind events |
What To Do When Buying a Home with Solar Panels
Request a Baseline Solar Inspection Report
Ask for a baseline solar inspection report if you’re buying a home with panels. Tests such as thermal scans and EL imaging can establish the condition of the solar panels. You may also want to see performance data over several months in order to compare the expected versus actual performance.
Inquire About Warranties
Make sure to ask about warranties, what components they cover, and whether warranties are affected by damage or maintenance neglect. On average, warranties range from 10 to 25+ years.
Get Professional Home Inspection Services
Ensure any maintenance or repair is done by professionals familiar with solar panel systems. Not only can they uncover often overlooked issues, but inspection professionals can point you in the direction of proper cleaning methods to reduce further harm.
Final Thoughts
Solar panels are powerful assets. Not only can they reduce your energy bills, but they can be an attractive amenity when it comes time to sell your home. But in Arizona’s harsh climate, even well-installed systems require attentive care to avoid hidden losses from dust, heat damage, physical wear, or internal defects.
Fortunately, there are solutions. Regular inspections, cleaning, and hardware checks can protect your solar panels and wallet over the long-term.
Learn more about solar inspections and how you can put the power of the sun to work for you.
