Union, Missouri, United States offers reasonably good conditions for year-round solar energy generation, though with notable seasonal variations typical of its Northern Temperate Zone location.

Seasonal Solar Performance

The solar energy output at Union, Missouri shows strong seasonal patterns. Summer delivers the highest production at 6.63 kWh per day per kW of installed solar capacity, making it the peak season for solar generation. Spring follows as the second-best performing season with 5.26 kWh per day per kW, offering excellent energy production as daylight hours increase and weather conditions improve. Autumn sees a notable decline to 4.01 kWh per day per kW as the sun angle decreases and weather patterns shift. Winter presents the most challenging conditions with only 2.38 kWh per day per kW, representing less than 40% of summer production levels.

Optimal Installation Configuration

For maximum year-round energy production at Union, Missouri, solar panels should be installed at a fixed tilt angle of 33 degrees facing south. This angle has been calculated to optimize total annual solar output by accounting for the sun's varying elevation throughout the year and weighting these angles based on actual solar irradiance data.

Local Environmental Factors

Several environmental and weather factors in Union, Missouri can impact solar energy production:

• Snow accumulation during winter months can temporarily block panels and reduce output
• Ice storms common to Missouri can damage panels or create temporary obstructions
• Severe thunderstorms and hail present risks to panel integrity
• High humidity levels can reduce panel efficiency
• Dust and pollen accumulation, particularly during spring months

Preventative Measures for Enhanced Performance

To maximize solar energy production despite these challenges, several installation strategies should be considered:

• Install panels with adequate tilt to promote natural snow and debris shedding
• Use tempered glass panels rated for hail impact resistance
• Ensure proper grounding and surge protection for storm resilience
• Plan for regular cleaning schedules, especially during high pollen seasons
• Consider micro-inverters or power optimizers to minimize impact of partial shading or soiling
• Install monitoring systems to quickly identify performance issues

Regular maintenance including panel cleaning and system inspection will help maintain optimal performance throughout the year. The significant winter production drop should be factored into energy planning, though the strong spring and summer performance helps balance overall annual output.

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 Union, Missouri

Seasonal solar PV output for Latitude: 38.4481, Longitude: -91.0193 (Union, Missouri, 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 33° South in Union, Missouri, United States

To maximize your solar PV system's energy output in Union, Missouri, United States (Lat/Long 38.4481, -91.0193) throughout the year, you should tilt your panels at an angle of 33° 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 Union, Missouri, 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 Union, Missouri, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 33° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
22° South in Summer	43° South in Autumn	53° South in Winter	31° 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 Union, Missouri, 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 Union, Missouri, 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 Union, Missouri, United States

Topography Around Union, Missouri

Union is situated in the eastern Missouri Ozarks region, where the landscape consists primarily of gently rolling hills and broad valleys carved by numerous streams and tributaries. The terrain around this Franklin County community represents a transitional zone between the flatter agricultural plains to the north and the more rugged Ozark highlands to the south and west. Elevations in the immediate area typically range from about 400 to 800 feet above sea level, creating a moderately undulating topography that offers both challenges and opportunities for large-scale development projects.

The Meramec River flows roughly east-west through the region south of Union, creating a significant valley system that has shaped much of the local landscape. This river valley and its associated tributaries have carved out relatively flat bottomlands that are interspersed with higher ridgelines and hillsides. The underlying geology consists primarily of limestone and dolomite formations typical of the Ozark region, with some areas featuring exposed bedrock and others covered by varying depths of soil and sediment.

North and east of Union, the terrain gradually transitions toward the flatter Mississippi River valley system, while areas to the south and west become increasingly hilly as they extend deeper into the Ozark Mountains. The local topography is characterized by numerous small creeks and intermittent streams that drain toward either the Meramec River or other tributaries of the Missouri and Mississippi river systems.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations around Union would be the relatively flat to gently sloping agricultural areas located primarily to the north and northeast of the city. These areas offer several advantages including more consistent terrain that requires less grading and site preparation, existing cleared land that reduces environmental impact, and generally good access to existing electrical infrastructure and transportation networks.

The broad ridge tops and gentle south-facing slopes throughout the region also present excellent opportunities for solar development. These elevated areas typically receive optimal solar exposure while avoiding the shadowing effects that can occur in narrow valleys or heavily forested hillsides. Many of these ridgeline areas are currently used for agriculture or managed forestry, making them potentially available for solar development with appropriate planning and land use agreements.

Areas along the Meramec River valley, particularly the flatter bottomlands and terraces, could also accommodate large solar installations, though developers would need to carefully consider flood risk and environmental sensitivities associated with riparian zones. These valley areas often provide large contiguous parcels of relatively flat land that can be ideal for utility-scale solar projects.

The rolling agricultural lands extending toward the northeast, in the direction of the Missouri River valley, represent perhaps the most promising region for major solar development. This area combines favorable topography with existing infrastructure, established electrical transmission corridors, and land use patterns that are compatible with renewable energy development. The gentler terrain in this direction also tends to have fewer environmental constraints compared to the more ecologically sensitive Ozark highland areas to the south and west.

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.