Solar Energy Potential in Shelbyville, Kentucky
The location at Shelbyville, Kentucky, United States (38.2145, -85.2254) offers moderate potential for solar energy generation throughout the year. Situated in the Northern Temperate Zone, this area experiences distinct seasonal variations in solar output. Summer presents the most favorable conditions for solar energy production, with an average daily output of 6.22 kWh per kW of installed solar capacity. Spring follows closely behind, generating 5.52 kWh/day. These seasons provide ample sunlight and longer days, making them ideal for maximizing solar energy production. Autumn sees a noticeable decrease in solar output, with 3.85 kWh/day. Winter experiences the lowest production at 2.15 kWh/day, primarily due to shorter days and increased cloud cover.Optimal Panel Installation
For fixed panel installations in Shelbyville, the ideal tilt angle to maximize year-round solar production is 33 degrees facing South. This angle optimizes the panels' exposure to sunlight throughout the year, accounting for the location's latitude and seasonal sun path variations.Environmental Considerations
While Shelbyville's climate is generally conducive to solar energy production, there are some environmental factors to consider: 1. Cloud cover: Kentucky experiences an average of 189 sunny days per year, which is slightly below the national average. Increased cloud cover, especially during winter months, can impact solar output. 2. Precipitation: The area receives an average of 46 inches of rain annually, which can temporarily reduce solar panel efficiency. To mitigate these factors, consider the following preventative measures:- Use high-efficiency solar panels that perform well in low-light conditions
- Implement a robust cleaning schedule to remove dirt and debris, especially after rainy periods
- Install a monitoring system to track performance and quickly identify any issues
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 Shelbyville
Seasonal solar PV output for Latitude: 38.2145, Longitude: -85.2254 (Shelbyville, 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 Shelbyville, United States
To maximize your solar PV system's energy output in Shelbyville, United States (Lat/Long 38.2145, -85.2254) 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 Shelbyville, 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 Shelbyville, 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 | 42° 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 Shelbyville, 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 Shelbyville, 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 Shelbyville, United States
The area around Shelbyville, United States, located at latitude 38.2145 and longitude -85.2254, is characterized by gently rolling hills and fertile farmland typical of the Bluegrass region of Kentucky. This picturesque landscape features a mix of open fields, pastures, and scattered woodlands, creating a patchwork of green hues across the countryside. The topography in this region is relatively mild, with elevations ranging from about 600 to 900 feet above sea level. The terrain is generally undulating, with shallow valleys and low ridges formed by centuries of erosion. Several small streams and creeks meander through the area, eventually feeding into larger rivers like the Kentucky River to the south.
Suitability for Large-Scale Solar PV
When considering areas nearby that would be most suited to large-scale solar PV installations, there are several factors to take into account. The gently rolling terrain around Shelbyville offers some advantages for solar energy development, as it provides ample open spaces with relatively flat land. The most suitable areas for large-scale solar PV would likely be found on the broader, flatter hilltops and in the more expansive valley floors. These locations would offer the best exposure to sunlight throughout the day and minimize shading from nearby hills or trees. Additionally, areas that are currently used for agriculture, particularly those with less productive soil, could be ideal candidates for solar farm development. It's important to note that while the topography is generally favorable, other factors such as proximity to existing power infrastructure, local zoning regulations, and environmental considerations would also play a crucial role in determining the most suitable locations for large-scale solar PV projects in the vicinity of Shelbyville.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: Thursday 17th of April 2025
Last Updated: Tuesday 12th of August 2025
Tell Us About Your Work
We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.
Feeling generous?
Share this with your friends!

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.




