Marshall, Texas, located in the Northern Subtropics at coordinates 32.5181, -94.3207, presents a moderately favorable location for year-round solar energy generation, though with significant seasonal variations that potential solar installers should carefully consider.

Seasonal Solar Production Performance

The solar energy output at Marshall shows substantial fluctuation throughout the year. Summer delivers the strongest performance at 6.83 kWh per day per kW of installed solar capacity, making it the peak season for solar generation. Spring follows as the second-best period with 5.32 kWh per day per kW, while autumn drops to 4.70 kWh per day per kW. Winter presents the most challenging conditions, producing only 2.75 kWh per day per kW of installed capacity. This seasonal pattern means that summer and spring are the ideal times for solar generation at this location, producing nearly 2.5 times more energy than the winter months. The significant winter drop-off is typical for locations at this latitude but represents a notable consideration for year-round energy planning. For optimal year-round energy production from a fixed panel installation at Marshall, solar panels should be tilted at 28 degrees facing south. This angle maximizes total annual solar output by accounting for the sun's changing position throughout the seasons and the varying solar irradiance levels at this specific latitude.

Local Environmental and Weather Challenges

Several environmental and weather factors in Marshall, Texas can significantly impact solar energy production:

• High humidity and frequent cloud cover: East Texas experiences substantial humidity levels and regular cloud formation, particularly during summer months, which can reduce solar irradiance even during peak season
• Severe weather events: The region is prone to thunderstorms, hail, and occasional ice storms that can damage solar panels or temporarily reduce production
• Heavy pollen and dust accumulation: The forested environment and seasonal pollen releases can create significant buildup on panel surfaces, reducing efficiency
• Tree coverage and shading: Marshall's heavily wooded landscape can create shading issues that dramatically reduce solar panel effectiveness

Preventative Measures for Optimal Solar Installation

To maximize solar energy production despite these local challenges, several preventative measures should be implemented: Regular maintenance scheduling is essential, including quarterly professional cleaning to remove pollen, dust, and organic debris that accumulates on panel surfaces. Installing panels with anti-soiling coatings can help reduce the frequency of required cleaning. Proper site selection becomes critical in this environment. Conduct thorough shade analysis throughout different seasons to identify locations with minimal tree interference. Consider selective tree trimming or removal where environmentally appropriate and legally permitted. Choose high-quality panels rated for severe weather conditions, including impact resistance for hail and strong mounting systems capable of withstanding high winds. Ensure proper grounding and surge protection given the area's thunderstorm frequency. Install monitoring systems that can quickly identify performance drops due to weather-related issues or equipment problems. This allows for rapid response to maintain optimal energy production throughout the year.

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 Marshall, Texas

Seasonal solar PV output for Latitude: 32.5181, Longitude: -94.3207 (Marshall, Texas, 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 28° South in Marshall, Texas, United States

To maximize your solar PV system's energy output in Marshall, Texas, United States (Lat/Long 32.5181, -94.3207) throughout the year, you should tilt your panels at an angle of 28° 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 Marshall, Texas, 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 Marshall, Texas, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 28° 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 Marshall, Texas, 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 Marshall, Texas, United States.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. 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 Marshall, Texas, United States

Topographical Features Around Marshall, Texas

Marshall sits in the heart of East Texas, positioned within the Piney Woods region where gently rolling hills dominate the landscape. The terrain around this area consists primarily of low ridges and shallow valleys that rarely exceed 400 feet in elevation above sea level. The topography is characterized by a series of undulating hills that create a moderately varied landscape without dramatic elevation changes or steep slopes.

The region features dense pine and hardwood forests that blanket much of the natural terrain, interspersed with cleared agricultural lands and pastures. Small creeks and streams wind through the valleys, eventually draining into larger waterways including Caddo Lake to the northeast and various tributaries of the Sabine River system. The soil composition consists mainly of sandy loams and clay deposits typical of the East Texas geological formation.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations would be the cleared agricultural fields and pastureland that dot the landscape south and west of Marshall. These areas offer relatively flat to gently sloping terrain that has already been cleared of the dense forest cover, eliminating the need for extensive land preparation and tree removal.

The rolling hills present both opportunities and considerations for solar development. South-facing slopes provide excellent orientation for solar panels, while the gentle gradients allow for efficient installation without requiring extensive grading or terracing. Areas with slopes between 5 and 15 degrees toward the south would be particularly advantageous for maximizing solar exposure throughout the day.

Former agricultural lands and cattle ranches in the vicinity offer the best combination of suitable topography and existing infrastructure access. These locations typically have established road access and proximity to electrical transmission lines, which are crucial factors for large-scale solar projects. The cleared fields also minimize environmental impact compared to forested areas that would require significant habitat disruption.

Areas near existing utility corridors and substations would be most practical for development, as they provide ready access to the electrical grid infrastructure necessary for power transmission. The relatively stable clay and sandy soil composition in cleared areas provides adequate foundation support for solar mounting systems while avoiding the root systems and ongoing maintenance issues associated with forested land.

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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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.