The location of Hannibal, Missouri, United States, situated at 39.7038 latitude and -91.3841 longitude, offers varying potential for solar energy generation throughout the year. This Northern Temperate Zone location experiences significant seasonal fluctuations in solar output, which impacts the overall efficiency of solar PV systems.
Seasonal Solar Performance
Summer stands out as the most productive season for solar energy in Hannibal, with an impressive daily output of 6.60 kWh per kW of installed solar capacity. Spring follows as the second-best season, generating 5.22 kWh per day. Autumn sees a noticeable decline in production, yielding 3.85 kWh daily. Winter presents the greatest challenge, with daily output dropping to just 2.24 kWh. These figures highlight the substantial variation in solar potential across seasons. The long, sunny days of summer provide ideal conditions for solar energy production, while the shorter, often overcast days of winter significantly reduce output.Optimal Panel Positioning
To maximize year-round solar energy production in Hannibal, fixed solar panels should be tilted at a 34-degree angle facing south. This orientation helps optimize the panels' exposure to sunlight throughout the year, balancing the varying sun angles across seasons.Environmental and Weather Considerations
Several factors in Hannibal could potentially impact solar energy production: 1. Snow accumulation in winter can temporarily reduce panel efficiency. 2. Cloudy days, particularly common in autumn and winter, can decrease solar output. 3. High humidity levels during summer may slightly reduce panel performance. To mitigate these issues, consider the following preventative measures: - Install panels at the recommended 34-degree tilt to encourage snow sliding off. - Use high-quality, weather-resistant panels designed to perform well in varying conditions. - Implement a regular cleaning schedule to remove any debris or snow buildup. - Consider a ground-mounted system for easier maintenance and cleaning access. While Hannibal's location presents some challenges for year-round solar energy production, proper system design and maintenance can help maximize output, especially during the highly productive summer and spring 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 Hannibal
Seasonal solar PV output for Latitude: 39.7038, Longitude: -91.3841 (Hannibal, 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 Hannibal, United States
To maximize your solar PV system's energy output in Hannibal, United States (Lat/Long 39.7038, -91.3841) 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 Hannibal, 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 Hannibal, 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 |
|---|---|---|---|
| 24° South in Summer | 44° South in Autumn | 54° South in Winter | 33° 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 Hannibal, 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 Hannibal, 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 Hannibal, United States
The topography around Hannibal, Missouri, located at 39.7038°N and 91.3841°W, is characterized by a mix of rolling hills, bluffs, and river valleys. Situated along the western bank of the Mississippi River, Hannibal's landscape is part of the larger Dissected Till Plains region, which features gently undulating terrain carved by glaciers and subsequent erosion. The city itself is nestled between steep limestone bluffs and the Mississippi River floodplain. To the west of Hannibal, the land gradually rises into a series of hills and ridges, creating a picturesque backdrop for the historic town. These hills are part of the broader Ozark Plateau, which extends southward into Arkansas. The immediate vicinity of Hannibal includes several small streams and creeks that feed into the Mississippi River. These waterways have carved shallow valleys through the landscape, creating a network of gentle slopes and flat bottomlands. The Bear Creek valley, south of the city, is a notable feature that has influenced local development and agriculture.
Solar PV Potential in the Hannibal Area
When considering areas near Hannibal for large-scale solar PV installations, several factors come into play. The most suitable locations would likely be found in the rural areas west and southwest of the city. These areas offer several advantages for solar development: Firstly, the gently rolling terrain provides ample flat or slightly sloping land that could accommodate large arrays of solar panels. These areas are often used for agriculture, which can be compatible with solar installations through dual-use strategies. Secondly, the higher elevations of the hills west of Hannibal may offer better exposure to sunlight throughout the day, potentially increasing the efficiency of solar panels. These locations would be less prone to shading from nearby terrain features. Additionally, the rural nature of these areas means there is likely to be less competition for land use and fewer obstacles to large-scale development. The presence of existing road infrastructure in these agricultural regions could also facilitate the construction and maintenance of solar facilities. However, it's important to note that any potential solar development would need to consider factors such as proximity to existing power infrastructure, local zoning regulations, and environmental impact assessments. The floodplains near the Mississippi River, while flat, may not be ideal due to flood risks and valuable agricultural land. In conclusion, while the varied topography around Hannibal presents some challenges for large-scale solar PV installations, the rural areas to the west and southwest of the city offer promising potential for such developments, balancing favorable terrain with practical considerations.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: Monday 11th 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.




