Grain Valley, Missouri, located in the Northern Temperate Zone, presents a moderately favorable location for year-round solar energy generation, though with significant seasonal variations that potential solar adopters should carefully consider.
Seasonal Solar Performance
The solar energy output at this location shows dramatic seasonal swings. Summer delivers the strongest performance at 6.73 kWh per day per installed kilowatt, making it nearly three times more productive than the weakest winter period at just 2.40 kWh per day. Spring provides solid energy generation at 5.12 kWh per day, while autumn falls to a moderate 3.95 kWh per day. This seasonal pattern means that summer months are ideal for solar energy generation, with spring serving as a strong secondary season. Winter represents the most challenging period for solar production, requiring careful system sizing to meet energy needs during these low-output months.Optimal Panel Configuration
For maximum year-round energy production at Grain Valley, solar panels should be installed at a fixed tilt angle of 34 degrees facing south. This angle has been calculated to optimize total annual solar output by accounting for the sun's changing position throughout the year and weighting for the actual solar energy potential at this specific latitude.Local Environmental Factors
Several regional factors in Missouri could impact solar energy production at this location:- Severe weather events including hailstorms, tornadoes, and ice storms that can damage solar equipment
- High humidity levels during summer months that may reduce panel efficiency
- Frequent thunderstorms that can cause temporary shading and electrical safety concerns
- Winter snow accumulation that can block panels and reduce output
- Dust and pollen buildup, particularly during spring months
Preventative Installation Measures
To maximize solar energy production despite these challenges, several installation strategies prove beneficial. Impact-resistant solar panels and reinforced mounting systems help protect against hail damage and severe weather. Proper panel spacing and tilt angles facilitate natural snow shedding and rain cleaning. Installing panels with adequate ventilation underneath helps combat efficiency losses from high humidity and heat. A monitoring system allows quick identification of performance issues, while accessible panel placement enables regular cleaning to remove dust, pollen, and debris. Surge protection equipment safeguards the system during frequent thunderstorms, and working with experienced local installers ensures compliance with regional building codes designed for Missouri's weather patterns. While Grain Valley's location provides decent solar potential, the significant seasonal variation and local weather challenges require thoughtful system design and installation practices to achieve optimal long-term 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 Grain Valley
Seasonal solar PV output for Latitude: 39.015, Longitude: -94.1986 (Grain Valley, 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 34° South in Grain Valley, United States
To maximize your solar PV system's energy output in Grain Valley, United States (Lat/Long 39.015, -94.1986) throughout the year, you should tilt your panels at an angle of 34° 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 Grain Valley, 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 Grain Valley, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 34° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 23° South in Summer | 43° South in Autumn | 54° South in Winter | 32° 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 Grain Valley, 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 Grain Valley, United States.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - 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 Grain Valley, United States
Topography Around Grain Valley
Grain Valley sits in the heart of western Missouri's gently rolling prairie landscape, positioned on the western edge of the Kansas City metropolitan area. The terrain here is characterized by broad, undulating hills and shallow valleys that were shaped by centuries of glacial activity and prairie grassland development. The elevation in and around Grain Valley typically ranges from about 800 to 1,000 feet above sea level, creating a landscape of modest relief that presents few dramatic elevation changes.
The area features the classic topography of the Great Plains transition zone, where the relatively flat agricultural lands of eastern Kansas gradually give way to the more varied terrain of Missouri's western counties. Rolling hills extend in all directions from the town, interspersed with creek valleys and drainage channels that flow generally northward toward the Missouri River. These waterways, including the Little Blue River system, have carved gentle valleys through the landscape over millennia.
The soil composition reflects the region's prairie heritage, with deep, fertile loess deposits covering much of the area. These soils developed under native grasslands and have been extensively converted to agricultural use. The terrain is predominantly open, with scattered woodlands typically confined to creek bottoms and steeper hillsides where farming proved less practical.
Optimal Areas for Large-Scale Solar Development
The gently rolling topography around Grain Valley presents numerous opportunities for large-scale solar photovoltaic installations. The most suitable areas are the broad, south-facing slopes that characterize much of the region's agricultural land. These gradual inclines provide natural drainage while offering excellent exposure to southern sky angles throughout the year.
Particularly promising locations can be found on the higher elevation ridges and hilltops that dot the landscape south and southwest of Grain Valley. These elevated areas typically experience better air circulation and fewer issues with morning fog or low-lying moisture that can occasionally affect valley floors. The consistent southward-sloping terrain in these areas minimizes shading concerns while maximizing solar exposure.
The extensive agricultural fields surrounding Grain Valley represent ideal candidates for solar development due to their large, unobstructed expanses and generally uniform topography. Many of these areas feature gentle slopes of less than 10 degrees, which is considered optimal for fixed-tilt solar installations. The open prairie landscape means minimal tree clearing would be required, reducing development costs and environmental impact.
Areas to the west and southwest of town are particularly well-suited because they combine favorable topography with proximity to existing electrical infrastructure along major transportation corridors. The relatively stable soil conditions throughout the region provide good foundation support for solar mounting systems, while the agricultural heritage means much of the land is already cleared and accessible via farm roads.
The broad valley floors, while generally flat and open, may be less ideal due to potential drainage concerns during heavy rainfall events and the possibility of morning fog accumulation. However, the higher portions of these valleys, particularly those with southern exposure, could still serve as viable solar sites with proper site preparation and drainage planning.
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!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Tuesday 5th of August 2025
Last Updated: Friday 8th of August 2025
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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.




