Centerville, Iowa presents a moderately favorable location for year-round solar PV energy generation, though with significant seasonal variations typical of the Northern Temperate Zone climate.

Seasonal Solar Production Patterns

The solar energy output at this location shows dramatic seasonal swings. Summer delivers the strongest performance at 6.51 kWh per day per kW of installed capacity, making it the prime season for solar generation. Spring follows as the second-best period with 5.18 kWh per day per kW, offering excellent production as daylight hours increase and temperatures remain moderate. Autumn sees a notable decline to 3.77 kWh per day per kW as the sun angle decreases and cloud cover typically increases. Winter presents the most challenging conditions with only 2.53 kWh per day per kW, representing less than 40% of summer production levels. For optimal year-round energy capture, solar panels should be installed at a fixed tilt angle of 36 degrees facing south. This angle maximizes total annual production by balancing the varying sun angles throughout the seasons.

Local Factors Affecting Solar Performance

Several environmental and weather factors in Centerville can significantly impact solar energy production:

• Snow accumulation - Iowa winters can bring substantial snowfall that covers panels and blocks sunlight
• Ice formation - Freezing rain and ice storms can create persistent coverage on panel surfaces
• Severe thunderstorms - Spring and summer storms may bring hail, high winds, and debris
• Agricultural dust - Being in a farming region, airborne soil and crop residue can accumulate on panels
• Humidity and morning dew - High moisture levels can reduce efficiency until panels dry

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies prove effective. Mounting panels at the recommended 36-degree tilt naturally helps snow and ice slide off more readily than flatter installations. Installing panels with adequate spacing between rows prevents snow buildup from one row shading another. Choosing high-quality mounting systems rated for high wind loads protects against storm damage. Some installers recommend impact-resistant glass or protective films in hail-prone areas, though this must be balanced against any light transmission reduction. Regular maintenance becomes crucial in this environment. Scheduling cleaning after dust storms or before peak production seasons helps maintain efficiency. Installing monitoring systems allows quick identification of snow coverage or other obstructions that reduce output. Proper electrical grounding and surge protection equipment safeguards the system during thunderstorms. Working with experienced local installers familiar with Iowa's specific weather patterns ensures appropriate design choices for long-term reliability and performance.

Note: The Northern Temperate Zone extends from 35° latitude North up to 66.5° 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 Centerville

Seasonal solar PV output for Latitude: 40.7313, Longitude: -92.8777 (Centerville, 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 36° South in Centerville, United States

To maximize your solar PV system's energy output in Centerville, United States (Lat/Long 40.7313, -92.8777) throughout the year, you should tilt your panels at an angle of 36° 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 Centerville, 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 Centerville, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 36° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
25° South in Summer	45° South in Autumn	55° South in Winter	34° 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 Centerville, 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 Centerville, 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 Centerville, United States

Topographical Features Around Centerville

Centerville, located in south-central Iowa, sits within the gently rolling landscape characteristic of the state's prairie region. The area features predominantly flat to moderately undulating terrain, with elevation changes that are typically gradual rather than steep. This part of Iowa was shaped by glacial activity thousands of years ago, resulting in fertile agricultural land with gentle slopes and broad valleys.

The immediate vicinity around Centerville consists mainly of farmland interspersed with small woodlots and creek bottoms. The Chariton River flows through the region, creating modest valleys and floodplains that add some variation to the otherwise relatively uniform topography. These river valleys represent the most significant topographical features in the area, though they are not particularly deep or dramatic compared to mountainous regions.

The landscape is dominated by agricultural use, with corn and soybean fields covering much of the surrounding countryside. Small groves of trees dot the landscape, often following creek lines or serving as windbreaks around farmsteads. The terrain generally slopes very gently, making it well-suited for farming operations and other land uses that require relatively level ground.

Optimal Areas for Large-Scale Solar Development

The topographical characteristics around Centerville present several advantages for large-scale solar photovoltaic installations. The predominantly flat to gently rolling terrain eliminates many of the challenges associated with steep slopes, such as complex grading requirements, erosion concerns, and shading issues between panel rows.

The most suitable areas for solar development would be the open agricultural fields on relatively level ground, particularly those with southern-facing slopes that can maximize solar exposure throughout the day. These locations offer the dual benefits of minimal site preparation costs and optimal panel positioning. The gentle nature of most slopes in the region means that even slightly inclined areas could accommodate solar arrays without significant grading work.

Areas to avoid for solar development would include the floodplains along the Chariton River and its tributaries, where periodic flooding could damage equipment and foundations. Additionally, the heavily wooded creek bottoms and existing farmstead locations with mature trees would require extensive clearing, making them less economically attractive for solar development.

The agricultural nature of much of the surrounding land presents both opportunities and considerations for solar development. While the open fields provide ideal conditions for solar installations, many of these areas represent prime farmland. However, the relatively uniform topography means that developers would have numerous site options to choose from, allowing for selection of areas that balance solar potential with minimal impact on the most productive agricultural soils.

The existing rural infrastructure, including farm roads and proximity to electrical transmission lines that serve the agricultural community, could facilitate solar development by providing access routes and potential grid connection points. The flat terrain would also simplify the logistics of transporting and installing large solar arrays, as heavy equipment can navigate the landscape more easily than in areas with challenging topography.

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.