Sierra Vista, Arizona represents an excellent location for year-round solar energy generation, with the data showing consistently strong performance across all seasons. This Northern Sub Tropics location at coordinates 31.5402, -110.267 demonstrates particularly impressive spring output at 8.14 kWh per day per kW of installed solar capacity.

Seasonal Solar Performance

The location shows robust energy production throughout the year, with spring being the peak season at 8.14 kWh/day per kW, followed closely by summer at 7.33 kWh/day per kW. Autumn maintains good performance at 5.61 kWh/day per kW, while winter, though the lowest season, still produces a respectable 4.35 kWh/day per kW of installed capacity. Spring emerges as the ideal time for solar generation at this location, likely due to the combination of increasing daylight hours and optimal sun angles without the atmospheric haze that can accompany peak summer months. The strong spring and summer performance makes this location particularly well-suited for solar installations.

Optimal Panel Configuration

For maximum year-round energy production at Sierra Vista, solar panels should be installed at a fixed tilt angle of 28 degrees facing south. This angle has been calculated to optimize total annual output by accounting for the sun's varying elevation throughout the year and weighting these angles based on solar irradiance data.

Environmental Factors and Challenges

Several local environmental factors could potentially impact solar production efficiency in Sierra Vista:

• Desert dust and sand: The arid desert environment generates significant dust accumulation on solar panels, which can reduce efficiency by 10-25% if left uncleaned
• Monsoon season: Summer monsoons bring dust storms and occasional heavy cloud cover that can temporarily reduce solar output
• Extreme heat: High summer temperatures can reduce panel efficiency, as solar panels typically lose about 0.4% efficiency for every degree above 77°F
• Hail potential: Occasional severe thunderstorms during monsoon season may produce hail that could damage panels

Preventative Measures for Optimal Performance

To maximize solar energy production despite these challenges, several preventative measures should be implemented: Regular cleaning schedules are essential, with panels needing cleaning every 2-4 weeks during dusty periods and after major dust storms. Automated cleaning systems or easy-access designs can make maintenance more practical and cost-effective. Proper ventilation spacing should be maintained beneath panels to allow air circulation and heat dissipation, helping to mitigate efficiency losses from extreme temperatures. Light-colored mounting systems can also help reflect heat away from the panels. High-quality tempered glass and robust mounting systems should be specified to withstand potential hail damage and high winds associated with desert storms. Impact-resistant panels are particularly recommended for this region. Installing monitoring systems allows for quick identification of performance issues, whether from weather events, dust accumulation, or equipment problems, enabling prompt corrective action to maintain optimal energy production. Despite these environmental challenges, Sierra Vista's consistently strong solar output across all seasons makes it an highly favorable location for solar energy generation, with proper installation and maintenance practices ensuring excellent long-term performance.

Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 4253 locations across the United States. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in the United States by location

Solar output per kW of installed solar PV by season in Sierra Vista

Seasonal solar PV output for Latitude: 31.5402, Longitude: -110.267 (Sierra Vista, United States), based on our analysis of 8760 hourly intervals of solar and meteorological data (one whole year) retrieved for that set of coordinates/location from NASA POWER (The Prediction of Worldwide Energy Resources) API:

 

Ideally tilt fixed solar panels 28° South in Sierra Vista, United States

To maximize your solar PV system's energy output in Sierra Vista, United States (Lat/Long 31.5402, -110.267) throughout the year, you should tilt your panels at an angle of 28° South for fixed panel installations.

As the Earth revolves around the Sun each year, the maximum angle of elevation of the Sun varies by +/- 23.45 degrees from its equinox elevation angle for a particular latitude. Finding the exact optimal angle to maximise solar PV production throughout the year can be challenging, but with careful consideration of historical solar energy and meteorological data for a certain location, it can be done precisely.

We use our own calculation, which incorporates NASA solar and meteorological data for the exact Lat/Long coordinates, to determine the ideal tilt angle of a solar panel that will yield maximum annual solar output. We calculate the optimal angle for each day of the year, taking into account its contribution to the yearly total PV potential at that specific location.

Seasonally adjusted solar panel tilt angles for Sierra Vista, United States

If you can adjust the tilt angle of your solar PV panels, please refer to the seasonal tilt angles below for optimal solar energy production in Sierra Vista, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 28° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
15° South in Summer	37° South in Autumn	46° South in Winter	24° South in Spring

Our recommendations take into account more than just latitude and Earth's position in its elliptical orbit around the Sun. We also incorporate historical solar and meteorological data from NASA's Prediction of Worldwide Energy Resources (POWER) API to assign a weight to each ideal angle for each day based on its historical contribution to overall solar PV potential during a specific season.

This approach allows us to provide much more accurate recommendations than relying solely on latitude, as it considers unique weather conditions in different locations sharing the same latitude worldwide.

Calculate solar panel row spacing in Sierra Vista, United States

We've added a feature to calculate minimum solar panel row spacing by location. Enter your panel size and orientation below to get the minimum spacing in Sierra Vista, United States.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. Minimum Spacing:
   We add the shadow length to the horizontal space occupied by tilted panels.

This approach ensures maximum space efficiency while avoiding shading during critical times, as the Winter solstice represents the worst-case scenario for shadow length.

Topography for solar PV around Sierra Vista, United States

Topographical Features of Sierra Vista

Sierra Vista sits in the Sulphur Springs Valley of southeastern Arizona, positioned at an elevation of approximately 4,600 feet above sea level. The city occupies a relatively flat valley floor that is surrounded by dramatic mountain ranges on multiple sides. To the west rise the Huachuca Mountains, which include peaks reaching over 9,000 feet in elevation. The Dragoon Mountains form the northern boundary of the valley, while the Mule Mountains lie to the east, and the Chiricahua Mountains can be seen in the distance to the northeast. The immediate terrain around Sierra Vista is characterized by gently rolling hills and broad, flat expanses typical of high desert basins in the American Southwest. The valley floor consists primarily of alluvial deposits that have accumulated over thousands of years, creating relatively stable and level ground with minimal slopes. This topography is interrupted by occasional washes and arroyos that channel seasonal rainfall toward the valley center. The landscape features typical Sonoran Desert vegetation, including mesquite, palo verde, various cacti species, and desert grasses. The terrain becomes more rugged as it approaches the surrounding mountain ranges, with increasing slopes and rocky outcroppings that eventually give way to pine forests at higher elevations in the mountains.

Optimal Areas for Large-Scale Solar Development

The Sulphur Springs Valley floor surrounding Sierra Vista presents excellent opportunities for large-scale solar photovoltaic installations. The most suitable areas lie on the expansive flat to gently sloping terrain that extends in all directions from the city center. These locations offer the stable foundations necessary for mounting large arrays while requiring minimal grading or site preparation. The areas immediately south and southwest of Sierra Vista are particularly well-suited for solar development. These zones feature extensive flat terrain with good access to existing transmission infrastructure along major highways. The land in these areas typically has gentle slopes of less than five percent, which is ideal for optimizing panel orientation while minimizing construction costs. North and northwest of the city, additional promising areas exist where the valley floor remains relatively level before beginning its gradual rise toward the Dragoon Mountains. These locations benefit from being somewhat removed from residential areas while still maintaining reasonable proximity to electrical grid connections and transportation corridors. The eastern portions of the valley also offer suitable terrain, though developers would need to consider the proximity to the Coronado National Forest and various environmental sensitivities associated with the nearby mountain ecosystems. Areas closer to the Mexican border to the south may present additional regulatory considerations but offer excellent topographical conditions for solar installations. When selecting specific sites within these general areas, the most favorable locations are those with minimal vegetation, stable soil conditions, and existing access roads. The alluvial soils common throughout the valley floor provide good bearing capacity for solar mounting systems, while the sparse desert vegetation reduces environmental impact concerns compared to more densely vegetated regions.

United States solar PV Stats as a country

United States ranks 2nd in the world for cumulative solar PV capacity, with 95,209 total MW's of solar PV installed. This means that 3.40% of United States's total energy as a country comes from solar PV (that's 26th in the world). Each year United States is generating 289 Watts from solar PV per capita (United States ranks 15th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in United States?

Yes, there are several incentives for businesses wanting to install solar energy in the United States. These include federal tax credits, state and local rebates, net metering policies, and renewable energy certificates (RECs). Additionally, many states have enacted legislation that requires utilities to purchase a certain amount of electricity from renewable sources such as solar.

Do you have more up to date information than this on incentives towards solar PV projects in United States? Please reach out to us and help us keep this information current. Thanks!

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Compare this location to others worldwide for solar PV potential

The solar PV analyses available on our website, including this one, are offered as a free service to the global community. Our aim is to provide education and aid informed decision-making regarding solar PV installations.

However, please note that these analyses are general guidance and may not meet specific project requirements. For in-depth, tailored forecasts and analysis crucial for feasibility studies or when pursuing maximum ROI from your solar projects, feel free to contact us; we offer comprehensive consulting services expressly for this purpose.

Helping you assess viability of solar PV for your site

Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide

Enhance your solar panel's performance with our in-depth guide. Determine the best tilt angle using hard data, debunk common misunderstandings, and gain insight into how your specific location affects solar energy production.