Wilmer, Texas offers reasonably good conditions for year-round solar energy generation, though with notable seasonal variations typical of its Northern Sub Tropical climate zone.
Seasonal Solar Performance
The location experiences strong summer solar production at 6.85 kWh per day per installed kW, making it an excellent time for solar energy generation. Spring also provides good output at 5.30 kWh per day per kW, while autumn drops to 4.89 kWh per day per kW. Winter presents the most challenging period with significantly reduced production of just 3.00 kWh per day per kW. For optimal year-round energy capture from a fixed panel installation at this location, solar panels should be tilted at 29 degrees facing south. This angle maximizes total annual production by accounting for the sun's changing position throughout the seasons.Local Factors Affecting Solar Production
Several environmental and weather factors in the Wilmer area can impact solar panel performance:- Severe Weather: Texas experiences thunderstorms, hail, and occasional tornadoes that can damage panels and reduce output
- High Summer Heat: Extreme temperatures can reduce panel efficiency despite abundant sunlight
- Dust and Pollen: The area's agricultural surroundings and seasonal pollen can accumulate on panels
- Humidity: High moisture levels can affect electrical connections and promote corrosion
Preventative Measures for Better Performance
To maximize solar energy production despite these challenges, several installation strategies prove effective. Installing panels with adequate ventilation underneath helps combat heat-related efficiency losses during hot Texas summers. Choosing panels and mounting systems rated for high wind speeds and hail impact provides protection against severe weather events. Regular cleaning schedules become particularly important in this location to remove dust, pollen, and debris that accumulate on panel surfaces. Using corrosion-resistant mounting hardware and electrical components helps withstand the humid climate conditions typical of the region. Overall, while Wilmer faces some environmental challenges, proper installation techniques and maintenance practices can help ensure reliable solar energy production throughout the year, with summer and spring offering the most productive periods.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 Wilmer
Seasonal solar PV output for Latitude: 32.599, Longitude: -96.6768 (Wilmer, 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 Wilmer, United States
To maximize your solar PV system's energy output in Wilmer, United States (Lat/Long 32.599, -96.6768) 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 Wilmer, 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 Wilmer, 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 | 37° South in Autumn | 48° 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 Wilmer, 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 Wilmer, 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 Wilmer, United States
Topographical Features of Wilmer and Surrounding Region
The area around Wilmer, located in Dallas County, Texas, sits within the expansive North Central Plains region of the state. This landscape is characterized by gently rolling terrain with relatively modest elevation changes, creating a topography that is neither mountainous nor completely flat. The elevation in and around Wilmer typically ranges from approximately 400 to 600 feet above sea level, with the land gradually sloping toward the southeast as it approaches the Trinity River system. The immediate vicinity features a mixture of prairie grasslands and scattered woodlands, with the terrain becoming increasingly developed as it approaches the Dallas metropolitan area to the north and west. The underlying geology consists primarily of sedimentary rocks, including limestone, shale, and sandstone formations that have been weathered over millennia to create the current undulating landscape. Small creeks and drainage channels carved into the terrain create minor valleys and ridgelines, though these features are generally subtle rather than dramatic. Agricultural land dominates much of the rural areas surrounding Wilmer, with fields that have been cleared and leveled for farming operations over many decades. These agricultural zones demonstrate the inherently workable nature of the local topography, as the gentle slopes and stable soils have proven suitable for mechanized farming equipment and large-scale land use.Optimal Areas for Large-Scale Solar Development
The topographical characteristics of the Wilmer region present several advantages for large-scale solar photovoltaic installations. The most suitable areas would be the expansive agricultural fields and cleared grasslands that extend primarily to the south and east of the town. These areas offer relatively flat to gently sloping terrain that would minimize the need for extensive grading and site preparation while providing adequate drainage to prevent water accumulation around solar equipment. The gently rolling prairie lands located southwest of Wilmer represent particularly attractive sites for solar development. These areas combine favorable topography with minimal existing development, reducing potential conflicts with residential or commercial land uses. The natural drainage patterns in these zones would help prevent flooding issues while the modest elevation changes could be incorporated into solar array designs to optimize panel orientation and spacing. Areas closer to existing transmission infrastructure would offer additional advantages for large-scale solar projects. The relatively flat agricultural zones near major roads and power lines would reduce the costs associated with grid connection and maintenance access. The stable, well-drained soils typical of former agricultural land also provide excellent foundations for solar mounting systems without requiring extensive ground preparation. The eastern portions of the surrounding area, where the land begins its gradual descent toward the Trinity River floodplain, should generally be avoided for large solar installations due to increased flood risk and potentially unstable soils. Similarly, the more heavily wooded areas would require significant clearing that could impact project economics and environmental 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: Wednesday 23rd of July 2025
Last Updated: Thursday 7th 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.




