Piedmont, Alabama offers reasonably good conditions for solar energy generation throughout most of the year. Located in the Northern Sub Tropics at coordinates 33.9246, -85.6114, this area experiences significant seasonal variation in solar production potential.

Seasonal Solar Performance

The location shows strong solar generation during warmer months, with summer producing 6.14 kWh per day per kW of installed solar capacity. Spring follows closely with 6.02 kWh per day per kW, making these the prime solar seasons. Autumn drops to 4.50 kWh per day per kW, while winter sees the lowest production at 2.78 kWh per day per kW of installed capacity. For optimal year-round energy production, solar panels should be installed at a fixed tilt angle of 30 degrees facing south. This angle maximizes total annual output by accounting for the sun's changing position throughout the seasons and weighting the optimal angles by the actual solar energy potential at different times of year.

Local Factors Affecting Solar Production

Several environmental and weather factors in the Piedmont, Alabama region can impact solar panel performance:

• High humidity and frequent thunderstorms - Alabama's subtropical climate brings regular summer storms that can reduce solar irradiance and create safety concerns
• Pollen accumulation - The region's heavy tree coverage produces significant pollen in spring, which can coat panels and reduce efficiency
• Occasional severe weather - Tornadoes, high winds, and hail storms pose risks to solar installations
• Dense vegetation - The area's lush plant growth can create shading issues if not properly managed

Preventative Measures for Better Performance

To maximize solar energy production despite these challenges, several installation strategies should be considered. Panels should be mounted with adequate spacing for air circulation to prevent moisture buildup and allow for easier cleaning access. Installing a robust mounting system rated for high wind loads helps protect against severe weather damage. Regular maintenance scheduling becomes particularly important in this climate. Panel cleaning should be planned for post-pollen season and after major storms. Establishing clear sight lines by trimming vegetation before installation and maintaining them annually prevents shading losses. Consider installing monitoring systems that can detect performance drops quickly, allowing for prompt cleaning or maintenance. Some installers also recommend slightly steeper mounting angles in high-pollen areas to help panels self-clean during rainfall. Overall, while Piedmont, Alabama presents some maintenance challenges typical of the southeastern United States, proper installation techniques and regular upkeep can ensure strong solar energy production, especially during the highly productive spring and summer seasons.

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 Piedmont, Alabama

Seasonal solar PV output for Latitude: 33.9246, Longitude: -85.6114 (Piedmont, 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 30° South in Piedmont, Alabama, United States

To maximize your solar PV system's energy output in Piedmont, Alabama, United States (Lat/Long 33.9246, -85.6114) throughout the year, you should tilt your panels at an angle of 30° 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 Piedmont, 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 Piedmont, Alabama, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 30° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
18° South in Summer	39° 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 Piedmont, 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 Piedmont, 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 Piedmont, Alabama, United States

Topographical Features of the Piedmont Region

The area around Piedmont, Alabama sits within the distinctive geographical region known as the Piedmont Plateau, which extends across much of the southeastern United States. This region is characterized by gently rolling hills and moderate elevation changes, creating a landscape that transitions between the higher Appalachian Mountains to the northeast and the flatter Coastal Plain to the south. The terrain around Piedmont typically features elevations ranging from approximately 800 to 1,200 feet above sea level, with the land gradually sloping toward the southwest. The topography consists primarily of weathered, ancient rock formations that have been shaped by millions of years of erosion, resulting in rounded hilltops and broad valleys. The area is dissected by numerous small streams and creeks that flow generally in a southwesterly direction toward the Coosa River system. These waterways have carved modest valleys through the landscape, creating a pattern of ridges and hollows that gives the region its characteristic undulating appearance.

Soil and Land Use Characteristics

The soils in this part of Alabama are predominantly clay-based, derived from the weathering of metamorphic and igneous rocks that form the geological foundation of the Piedmont. These soils tend to be well-drained on the higher elevations and slopes, though they can become more moisture-retentive in the valley bottoms and areas with gentler gradients. The region supports a mix of pine and hardwood forests, agricultural land, and residential development, with much of the original forest cover having been cleared for farming and other human activities over the past two centuries. Agricultural use in the area includes both crop production and pastureland for livestock, with the rolling terrain making some areas more suitable for grazing than intensive cultivation. The moderate slopes and well-drained soils on many of the ridgetops and south-facing hillsides provide stable foundation conditions for development projects.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations in the Piedmont area would be the broad, gently sloping ridgetops and south-facing hillsides that characterize much of the region. These elevated areas typically offer the best combination of stable ground conditions, minimal shading from surrounding terrain, and favorable solar exposure throughout the day. The moderate slopes found on many of these sites are generally within acceptable ranges for solar panel installation while providing natural drainage that helps prevent water accumulation. Areas with slopes between two and ten degrees are particularly well-suited for solar development, as they provide good drainage while remaining gentle enough for efficient panel installation and maintenance access. The ridgelines and upper slopes in the region often feature these ideal gradients, especially those with southern or southwestern orientations that maximize solar collection potential. Former agricultural land, particularly open pastures and cleared fields on the higher elevations, represents some of the most promising opportunities for solar development. These areas typically have existing road access, relatively level or gently sloping terrain, and minimal environmental constraints compared to forested areas that would require extensive clearing. The stable clay soils found on many ridge areas provide good foundation conditions for solar mounting systems, though proper engineering analysis would be required for any specific site. Valley bottoms and areas near streams should generally be avoided for large-scale solar installations due to potential flooding concerns, higher moisture levels, and the increased likelihood of morning fog or mist that could affect solar panel efficiency. Additionally, these lower-lying areas are more likely to experience shading from surrounding hills during certain times of the day, particularly in winter months when the sun angle is lower.

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.