Waldo, Arkansas represents a moderately good location for year-round solar energy generation, though it experiences significant seasonal variation typical of its Northern Sub-Tropical climate zone.
Seasonal Solar Performance
The solar energy output at this location varies considerably throughout the year. Summer provides the strongest performance at 6.89 kWh per day per installed kilowatt, making it the peak season for solar generation. Spring follows as the second-best season with 5.40 kWh daily output per kilowatt. Autumn shows a notable decline to 4.50 kWh per day per kilowatt, while winter presents the most challenging conditions with only 2.58 kWh daily per kilowatt. This represents a dramatic drop of nearly 63% from summer peak performance to winter lows.Optimal Installation Configuration
For maximum year-round energy production at Waldo, Arkansas, solar panels should be installed at a fixed tilt angle of 29 degrees facing south. This angle has been calculated to optimize total annual output by accounting for the sun's changing position throughout the year and weighting for the varying solar potential across all seasons.Environmental and Weather Challenges
Several local factors could potentially impact solar energy production in this Arkansas location:- High humidity and frequent cloud cover: The subtropical climate brings regular moisture and overcast conditions, particularly during summer months when thunderstorms are common
- Ice storms and severe weather: Arkansas experiences periodic ice storms in winter and severe thunderstorms with hail in spring and summer
- Dust and pollen accumulation: The region's agricultural activity and abundant vegetation can lead to panel soiling
- High summer temperatures: Extreme heat can reduce panel efficiency despite increased sunlight hours
Preventative Measures for Better Performance
To maximize solar energy production despite these challenges, several installation strategies should be considered:- Impact-resistant panels: Choose panels rated for hail resistance and high wind loads to withstand severe weather
- Proper drainage design: Ensure mounting systems allow water runoff to prevent ice formation and reduce cleaning needs
- Regular maintenance schedule: Plan for periodic cleaning to remove dust, pollen, and debris, especially after storms
- Quality mounting systems: Use corrosion-resistant materials suitable for high humidity environments
- Adequate ventilation: Design installations with proper airflow to help panels run cooler during hot summers
Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° 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 Waldo
Seasonal solar PV output for Latitude: 33.3613, Longitude: -93.2976 (Waldo, 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 29° South in Waldo, United States
To maximize your solar PV system's energy output in Waldo, United States (Lat/Long 33.3613, -93.2976) throughout the year, you should tilt your panels at an angle of 29° 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 Waldo, 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 Waldo, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 29° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 17° South in Summer | 38° South in Autumn | 49° South in Winter | 26° 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 Waldo, 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 Waldo, 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 Waldo, United States
Topographical Features Around Waldo, Arkansas
Waldo is situated in the southwestern region of Arkansas within Columbia County, where the landscape is characterized by gently rolling hills and relatively modest elevation changes. The area sits within the West Gulf Coastal Plain physiographic region, which extends across much of southern Arkansas. This terrain features a mix of low ridges, shallow valleys, and broad, flat areas that create a varied but generally manageable topography for development projects.
The elevation around Waldo typically ranges from approximately 200 to 400 feet above sea level, with gradual slopes rather than steep inclines. The region's topography was shaped by ancient marine sediments and subsequent erosion patterns, resulting in a landscape that undulates softly across the countryside. Small creeks and tributaries have carved shallow drainage channels throughout the area, creating a network of minor valleys separated by low hills and plateaus.
The soils in this region are predominantly sandy and clayey, derived from Tertiary and Cretaceous geological formations. These soil types, combined with the moderate topography, support both agricultural activities and potential industrial development. The area experiences typical southern pine forest vegetation on higher ground, with hardwood forests and agricultural fields occupying the lower-lying areas and valley floors.
Optimal Areas for Large-Scale Solar Development
The most suitable locations for large-scale solar photovoltaic installations around Waldo would be the relatively flat to gently sloping areas that characterize much of the local landscape. The broad plateaus and wide valley floors offer the best opportunities for solar development, as these areas provide sufficient space for extensive panel arrays while minimizing the need for extensive grading or terrain modification.
Areas with south-facing slopes of less than 10 degrees would be particularly advantageous, as they can naturally optimize panel positioning for maximum solar exposure throughout the day. The low ridges and hilltops in the region often provide these ideal orientations while also offering good drainage characteristics that are important for long-term installation stability.
Former agricultural fields and cleared areas would present the most immediate opportunities for solar development, as they already lack significant tree cover and have relatively level surfaces. These locations would require minimal site preparation compared to forested areas, reducing both development costs and environmental impact. The existing road network in the agricultural areas also provides better access for construction equipment and ongoing maintenance operations.
Areas to avoid for large-scale solar installations would include the steeper slopes along creek beds and drainage channels, where erosion concerns and irregular terrain would complicate installation and maintenance. Additionally, the densely forested areas on some of the higher ridges would require extensive clearing, making them less economically attractive for solar development despite potentially favorable sun exposure.
The relatively stable geological conditions in the region, with well-drained soils and minimal seismic activity, create favorable conditions for the long-term structural integrity of solar installations. The moderate topography also facilitates the construction of access roads and electrical infrastructure needed to connect large solar arrays to the regional power grid.
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.




