Plymouth, Indiana, United States experiences significant seasonal variations in solar energy production throughout the year. Located in the Northern Temperate Zone, this location demonstrates both the potential and limitations of solar PV systems in regions with distinct seasonal weather patterns.
Seasonal Solar Production
Solar panels in Plymouth generate their highest output during summer months, producing an average of 6.29kWh per day for each kilowatt of installed capacity. Spring follows as the second-most productive season with 5.30kWh/day. Production decreases substantially during autumn (3.29kWh/day) and reaches its lowest point in winter, generating only 1.96kWh/day per installed kilowatt.
The significant difference between summer and winter production (over 3 times more energy in summer) highlights the seasonal nature of solar generation at this latitude. This pattern means Plymouth residents with solar installations should expect substantially more electricity during the warmer months.
Optimal Panel Installation
For fixed panel installations in Plymouth, the ideal tilt angle to maximize year-round solar production is 35 degrees facing South. This angle optimizes the annual solar harvest by balancing seasonal variations and accounting for the Earth's elliptical orbit.
Environmental and Weather Factors
Several local factors can impede solar production in Plymouth. Winter snowfall represents the most significant challenge, as snow accumulation on panels can dramatically reduce or completely block energy generation. Plymouth's location in northern Indiana means it typically receives substantial snowfall that can cover panels for extended periods.
Cloud cover is another important consideration, particularly during late autumn and winter months when the region experiences frequent overcast days. Additionally, Plymouth can experience occasional severe weather including thunderstorms and hail during spring and summer, which could potentially damage solar installations.
Preventative Measures
To maximize solar production in Plymouth despite these challenges, consider these preventative measures:
- Install panels at the recommended 35-degree tilt, which helps shed snow more effectively than flatter installations
- Implement a snow removal plan for winter months, which might include using specialized solar panel snow rakes
- Consider slightly oversizing the system to compensate for winter production losses
- Use high-efficiency panels with good low-light performance to maximize energy collection during cloudy periods
- Ensure installations include hail-resistant panels and proper mounting systems that can withstand local wind conditions
With proper system design and maintenance practices, Plymouth residents can still achieve satisfactory solar generation despite the seasonal challenges, particularly by capitalizing on the highly productive spring and summer months.
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 Plymouth, Indiana
Seasonal solar PV output for Latitude: 41.3525, Longitude: -86.3061 (Plymouth, Indiana, 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 35° South in Plymouth, Indiana, United States
To maximize your solar PV system's energy output in Plymouth, Indiana, United States (Lat/Long 41.3525, -86.3061) throughout the year, you should tilt your panels at an angle of 35° 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 Plymouth, Indiana, 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 Plymouth, Indiana, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 35° 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 | 56° 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 Plymouth, Indiana, 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 Plymouth, Indiana, 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 Plymouth, Indiana, United States
The topography around Plymouth, Indiana, situated at coordinates 41.3525° N, 86.3061° W, is characterized primarily by gently rolling plains typical of the Midwestern United States. This area lies within what geographers call the Central Lowlands physiographic province, specifically in the Till Plains section. The landscape was largely shaped by glacial activity during the Pleistocene epoch, resulting in a relatively flat to moderately undulating terrain. The elevation in Plymouth averages approximately 800 feet (244 meters) above sea level, with minimal variation throughout the immediate area. The Yellow River, a tributary of the Kankakee River, flows through Plymouth, creating shallow valleys and contributing to the local topography. Small glacial features such as moraines and kettle lakes dot the landscape, adding subtle diversity to an otherwise uniform terrain.
Soil Composition and Land Use
The soils around Plymouth are predominantly fertile glacial till, consisting of clay loams and silt loams. These soils developed from materials deposited by retreating glaciers, making them generally productive for agriculture. The region is dominated by agricultural land use, with extensive corn and soybean cultivation being the primary activity. Interspersed among these agricultural fields are small woodlots, wetlands, and residential areas.Potential Areas for Solar PV Development
For large-scale solar photovoltaic (PV) installations near Plymouth, several factors make certain areas more suitable than others. The most promising locations would be: Agricultural lands with marginal productivity would be prime candidates for solar development. These areas, particularly those with slight south-facing slopes, would receive optimal sunlight exposure throughout the year. Fields located east and south of Plymouth offer relatively unobstructed horizons and minimal shading concerns. Former industrial sites or brownfields in Marshall County could be repurposed for solar installations. These locations often have existing infrastructure connections and represent an opportunity for land reclamation through clean energy development. Areas adjacent to existing electrical infrastructure, such as transmission lines or substations, would reduce interconnection costs significantly. Several such corridors exist in the vicinity of Plymouth, particularly along major transportation routes. The flat terrain throughout much of the region is advantageous for solar development as it minimizes grading requirements and associated construction costs. This characteristic is particularly evident in the agricultural plains extending to the west and south of Plymouth.Topographical Considerations
While the region is generally suitable for solar development, some topographical factors warrant consideration. Localized low-lying areas, particularly near the Yellow River and its tributaries, may be prone to seasonal flooding and should be avoided. Additionally, the few areas with more pronounced slopes or those with northern exposure would be less optimal for maximum solar energy capture. The glacial history of the region has left some areas with higher concentrations of large stones and boulders in the soil, which could increase construction complexity. However, modern construction techniques can generally overcome these challenges without significant cost implications. The relatively open landscape does experience strong winds at times, particularly in winter months, necessitating robust mounting systems for solar arrays. However, this characteristic could potentially support dual-use installations combining wind and solar technologies. In summary, the topography around Plymouth presents favorable conditions for large-scale solar PV development, with ample flat to gently rolling terrain and minimal natural obstacles. The most suitable areas would be those combining favorable orientation, proximity to infrastructure, and land that is either marginal for agriculture or already disturbed by previous development.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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Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Sunday 27th of April 2025
Last Updated: Monday 21st of July 2025
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Compare this location to others worldwide for solar PV potential
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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.




