Greenville, Alabama 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 shows a clear seasonal pattern. Summer delivers the strongest performance at 6.28 kWh per day per kW of installed solar capacity, making it the peak production season. Spring follows closely behind with 6.16 kWh per day, representing nearly identical output levels. Autumn sees a notable drop to 4.68 kWh per day, while winter presents the most challenging conditions with only 3.00 kWh per day. This winter low point represents less than half the summer peak, highlighting the importance of proper system sizing for year-round energy needs. For fixed panel installations at this location, the ideal tilt angle is 28 degrees facing south to maximize total annual energy production.

Environmental and Weather Challenges

Several local factors in Greenville, Alabama can impact solar energy production:

• High humidity levels typical of the Southeast create more frequent cloud cover and haze
• Summer thunderstorms and severe weather events common to Alabama
• Pollen accumulation during spring months, particularly from pine trees abundant in the region
• Occasional ice storms during winter months

Preventative Measures for Optimal Performance

To maximize solar energy production despite these challenges, several installation strategies prove effective:

• Install panels with adequate spacing for air circulation to reduce humidity-related efficiency losses
• Use mounting systems designed to withstand high winds and severe weather typical of Alabama
• Plan for regular cleaning schedules, especially during spring pollen season
• Consider micro-inverters or power optimizers to minimize impact when individual panels are shaded or dirty
• Ensure proper drainage around ground-mounted systems to prevent water pooling

Regular maintenance becomes particularly important in this climate, with quarterly cleaning recommended during peak pollen seasons and after major weather events.

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 Greenville, Alabama

Seasonal solar PV output for Latitude: 31.8296, Longitude: -86.6178 (Greenville, Alabama, 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 Greenville, Alabama, United States

To maximize your solar PV system's energy output in Greenville, Alabama, United States (Lat/Long 31.8296, -86.6178) 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 Greenville, Alabama, 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 Greenville, Alabama, 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
16° South in Summer	37° South in Autumn	47° South in Winter	24° 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 Greenville, Alabama, 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 Greenville, Alabama, 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 Greenville, Alabama, United States

Topographical Features of Greenville, Alabama

Greenville sits in the heart of south-central Alabama's gently rolling countryside, characterized by moderate elevation changes and a landscape shaped by centuries of natural weathering. The terrain around this Butler County seat features a mix of low hills, shallow valleys, and relatively flat agricultural areas that are typical of the Gulf Coastal Plain region. Elevations in the immediate vicinity generally range from about 200 to 400 feet above sea level, creating a terrain that undulates pleasantly without presenting significant topographical challenges.

The area's geology consists primarily of sedimentary formations laid down millions of years ago, resulting in soils that drain moderately well while supporting both agricultural activities and natural forest growth. Small creeks and tributaries wind through the landscape, creating narrow floodplains and gentle slopes that lead down to these waterways. The topography becomes slightly more varied to the north and east, where the land begins its gradual transition toward the more mountainous regions of central Alabama.

Optimal Locations for Large-Scale Solar Development

The most promising areas for substantial solar photovoltaic installations lie primarily to the south and southwest of Greenville, where the terrain flattens considerably and opens into expansive agricultural fields. These areas offer the dual advantages of minimal grading requirements and existing cleared land that could potentially be repurposed for solar development. The relatively level topography in these zones would significantly reduce construction costs while providing excellent southern exposure opportunities.

Agricultural areas extending eastward from the city also present strong potential, particularly those currently used for row crops or pastureland. The gentle slopes in these regions generally face favorable directions for solar collection, and the existing infrastructure of rural roads would facilitate both construction access and ongoing maintenance operations. These locations benefit from being sufficiently removed from residential areas while remaining close enough to existing electrical transmission infrastructure.

Areas immediately north of Greenville, while more varied topographically, contain several elevated plateaus that could serve well for solar installations. These higher elevations often provide excellent exposure and natural drainage, though they may require more careful site planning to work with the existing contours. The key advantage of these northern locations lies in their combination of good exposure and proximity to major transportation corridors.

The terrain west of the city presents mixed opportunities, with some excellent flat areas interspersed with more rolling topography. Careful site selection in this direction could identify parcels that combine favorable slopes with adequate size for meaningful solar development. The western approach also offers potential advantages in terms of land availability and distance from sensitive environmental areas.

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.