Morris, Illinois, located in the Northern Temperate Zone, presents a moderately favorable location for year-round solar photovoltaic energy generation, though with significant seasonal variations that potential solar installers should carefully consider.
Seasonal Solar Performance
The solar energy output at this location shows dramatic seasonal swings typical of northern temperate climates. Summer delivers the strongest performance at 6.25 kWh per day per kW of installed capacity, making it the prime solar generation season. Spring follows as the second-best period with 5.28 kWh per day per kW, offering excellent solar conditions as daylight hours increase and weather clears. Autumn sees a notable decline to 3.39 kWh per day per kW as the region transitions toward winter conditions. Winter represents the most challenging period for solar generation, dropping to just 2.36 kWh per day per kW of installed capacity - less than 40% of summer output.Optimal Installation Configuration
For maximum year-round energy production at Morris, Illinois, fixed solar panels should be installed at a 36-degree tilt 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 for daily photovoltaic potential based on solar irradiance data.Local Environmental Challenges
Several environmental and weather factors in Morris, Illinois can significantly impact solar energy production:- Snow accumulation: Winter weather can cause snow to accumulate on panels, completely blocking solar generation until removed
- Agricultural dust and pollen: The rural agricultural environment generates seasonal dust and pollen that can coat panels and reduce efficiency
- Severe thunderstorms: The region experiences intense summer storms with potential hail damage and high winds
- High humidity and condensation: Midwest humidity can create morning dew and condensation that temporarily reduces panel efficiency
Preventative Installation Measures
Several strategies can help maximize solar production despite these local challenges. Installing panels at the optimal 36-degree tilt naturally helps snow slide off more easily than flatter installations, though manual snow removal may still be necessary during heavy accumulation periods. Regular cleaning schedules become particularly important in this agricultural setting, with spring and fall cleanings essential to remove pollen buildup and harvest-season dust. Installing panels with adequate spacing allows for proper air circulation, reducing condensation issues and making maintenance access easier. Choosing impact-resistant panels and secure mounting systems helps protect against hail damage and high winds common to the region. Some installers also recommend slightly steeper tilt angles in snow-prone areas, though this should be balanced against the calculated optimal angle for maximum annual production.Overall Assessment
While Morris, Illinois faces typical Midwest challenges for solar installation, the location remains viable for solar energy generation. The strong summer and spring performance can offset the weaker winter months, particularly when proper installation techniques and maintenance schedules address local environmental factors. The key to success lies in proper system design that accounts for seasonal variations and local weather patterns.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 Morris
Seasonal solar PV output for Latitude: 41.3693, Longitude: -88.4179 (Morris, 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 Morris, United States
To maximize your solar PV system's energy output in Morris, United States (Lat/Long 41.3693, -88.4179) 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 Morris, 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 Morris, 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 Morris, 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 Morris, 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 Morris, United States
Topographical Features Around Morris, Illinois
Morris is situated in the northeastern region of Illinois, positioned within Grundy County approximately 60 miles southwest of Chicago. The landscape surrounding Morris is characterized by relatively flat terrain typical of the Illinois prairie region, with gentle rolling hills and minimal elevation changes across the area. The community sits at an elevation of roughly 500 feet above sea level, nestled within the Illinois River valley system.
The Illinois River flows northeast of Morris, creating a broad floodplain that extends several miles in width. This river valley represents the lowest elevation in the immediate area, while the surrounding uplands rise gradually to form subtle ridges and plateaus. The topography reflects the region's glacial history, with deposits from ancient ice sheets creating the characteristic gentle undulations seen throughout northern Illinois.
Agricultural fields dominate the landscape for miles in all directions from Morris, with corn and soybean cultivation covering vast expanses of fertile prairie soil. These agricultural areas feature minimal slope variations, typically ranging from completely flat to gentle grades of less than 2-3 percent. Scattered woodlands follow drainage patterns and creek valleys, creating ribbons of trees that meander through the otherwise open countryside.
Optimal Areas for Large-Scale Solar Development
The extensive agricultural lands surrounding Morris present excellent opportunities for large-scale solar photovoltaic installations. The flat to gently rolling terrain eliminates concerns about steep slopes that could create shading issues or increase construction complexity. Areas located south and southwest of Morris offer particularly favorable conditions, where large contiguous parcels of relatively flat farmland provide ample space for utility-scale solar arrays.
The upland areas away from the Illinois River floodplain would be most suitable for major solar developments. These slightly elevated locations offer better drainage characteristics and reduce potential flooding concerns while maintaining the favorable flat topography. The agricultural fields in these areas typically feature minimal tree coverage and few obstructions, allowing for optimal solar panel placement and maintenance access.
Transportation infrastructure around Morris supports large-scale development, with several major highways providing access to potential solar sites. The existing electrical transmission infrastructure in the region, including substations and transmission lines serving the area's industrial facilities, would facilitate grid connection for utility-scale solar projects. The combination of flat terrain, minimal shading obstacles, and existing infrastructure makes the agricultural areas within a 10-mile radius of Morris particularly well-suited for substantial solar installations.
Areas immediately adjacent to existing industrial facilities or near major transportation corridors would offer additional advantages for solar development, as they often feature established utility connections and road access. The relatively sparse population density in the rural areas surrounding Morris also reduces potential conflicts with residential development while providing abundant open space for large solar arrays.
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: Friday 1st 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.




