Greeneville, Tennessee, located in the Northern Temperate Zone, offers moderate conditions for solar energy generation throughout the year, though with significant seasonal variation that makes it less than ideal for consistent solar power production.

Seasonal Solar Performance

The solar energy output at this location shows a typical temperate climate pattern. Summer provides the strongest performance at 6.55 kWh per day per kW of installed solar capacity, making it the prime season for solar generation. Spring follows as the second-best period with 5.64 kWh per day per kW, offering nearly as much potential as summer months. Autumn sees a notable decline to 4.18 kWh per day per kW, while winter presents the most challenging conditions with only 2.38 kWh per day per kW. This means winter production is less than half of summer output, creating significant seasonal variability that requires careful planning for year-round energy needs.

Optimal Installation Setup

For maximum year-round solar production at Greeneville, fixed solar panels should be tilted at 31 degrees facing south. This angle is calculated to optimize total annual energy capture by accounting for the sun's changing position throughout the seasons and the varying solar irradiance levels at this latitude.

Local Factors Affecting Solar Production

Several environmental and weather factors in the Greeneville area can impact solar panel performance:

• Appalachian Mountain Weather Patterns: The region's location in the Appalachian foothills can create frequent cloud cover and fog, particularly in valleys and during certain seasons
• High Humidity and Precipitation: Tennessee's humid subtropical climate brings regular rainfall and high moisture levels that can reduce solar irradiance
• Seasonal Storm Activity: Spring and summer thunderstorms, along with occasional severe weather, can temporarily block sunlight and potentially damage equipment
• Tree Coverage and Terrain: The heavily forested regional landscape and rolling hills can create shading issues depending on installation location

Preventative Measures for Better Performance

To maximize solar energy production despite these challenges, several installation strategies can help:

• Site Selection: Choose elevated locations with southern exposure and minimal tree coverage, avoiding valley locations prone to fog
• Panel Cleaning Systems: Install easy-access mounting systems or automated cleaning to remove accumulated pollen, dust, and moisture common in humid climates
• Robust Mounting: Use heavy-duty mounting systems designed to withstand high winds and potential severe weather events
• Strategic Tree Management: Trim or remove trees that cast shadows on panels, particularly those to the south, southeast, and southwest of the installation
• Proper Drainage: Ensure good drainage around ground-mounted systems to prevent water accumulation and potential electrical issues

Overall, while Greeneville's location provides decent solar potential during warmer months, the significant winter reduction and local environmental factors make it a moderately challenging location for solar energy generation that requires thoughtful planning and installation practices.

Note: The Northern Temperate Zone extends from 35° latitude North up to 66.5° 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 Greeneville

Seasonal solar PV output for Latitude: 36.1294, Longitude: -82.866 (Greeneville, 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 31° South in Greeneville, United States

To maximize your solar PV system's energy output in Greeneville, United States (Lat/Long 36.1294, -82.866) throughout the year, you should tilt your panels at an angle of 31° 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 Greeneville, 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 Greeneville, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 31° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
20° South in Summer	41° South in Autumn	51° South in Winter	29° 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 Greeneville, 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 Greeneville, 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 Greeneville, United States

Topography Around Greeneville, Tennessee

Greeneville sits in the northeastern corner of Tennessee, nestled within the Great Appalachian Valley between the Blue Ridge Mountains to the east and the Cumberland Mountains to the northwest. The city itself rests at approximately 1,200 feet above sea level in a relatively flat valley bottom, surrounded by rolling hills and ridgelines that gradually rise toward the mountain ranges on either side.

The immediate landscape around Greeneville features a mix of gentle slopes, river terraces, and bottomland along the Nolichucky River, which flows through the area from east to west. The valley floor where the city is located provides some of the flattest terrain in the region, though even here the land exhibits subtle undulations and drainage patterns that create minor elevation changes across short distances.

Moving outward from the city center, the topography becomes increasingly varied. To the north and south, the land rises into a series of parallel ridges and valleys characteristic of the Ridge and Valley physiographic province. These ridgelines typically run northeast to southwest, following the grain of the ancient Appalachian mountain-building processes. Between these ridges lie narrow valleys, many of which contain small streams and agricultural areas.

Terrain Challenges and Opportunities

The mountainous nature of the broader region presents both opportunities and constraints for development. While the higher elevations offer expansive views and potentially fewer obstructions, they also present challenges in terms of access, slope stability, and exposure to weather. The valley areas, while more accessible and developable, can experience temperature inversions and may have more limited space for large installations.

Forest cover dominates much of the surrounding landscape, particularly on the steeper slopes and higher elevations. The valley floors and gentler hillsides contain a mixture of agricultural land, pastures, and scattered residential development. This pattern of land use reflects both the natural constraints of the topography and centuries of human adaptation to the mountain environment.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations around Greeneville would be found on the south-facing slopes and ridge tops that offer good solar exposure without excessive steepness. Areas with slopes between 0 and 15 degrees would be ideal, as they provide adequate drainage while remaining cost-effective for construction and maintenance access.

The agricultural valleys immediately surrounding Greeneville present excellent opportunities for solar development. These areas typically have been cleared of trees, have relatively gentle topography, and often feature existing road access. The flat to gently rolling terrain along the Nolichucky River valley and similar tributary valleys would require minimal grading and could accommodate large arrays with standard mounting systems.

Ridge tops that have been previously cleared for agriculture or other uses also represent prime locations, particularly those with southern exposure. These elevated sites would benefit from fewer shading issues and potentially better air circulation for cooling. However, developers would need to carefully consider access roads and transmission line connections for such locations.

Areas to the south and southeast of Greeneville, where the valley widens before reaching the foothills of the Blue Ridge, offer some of the most promising terrain. This region combines relatively flat topography with good southern exposure and existing infrastructure. The gentler transition zone between the valley floor and the rising foothills provides numerous sites that balance optimal solar angles with practical development 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!

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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.