Elizabethton, Tennessee offers moderate solar energy potential for year-round electricity generation, though with significant seasonal variation that affects overall efficiency.

Seasonal Solar Performance

The solar energy output in Elizabethton varies considerably throughout the year. Summer provides the highest production at 6.55 kWh per day per kW of installed solar capacity, making it the peak season for solar generation. Spring follows as the second-best season with 5.64 kWh per day per kW, offering nearly as good performance as summer months. Autumn drops to 4.18 kWh per day per kW, representing a moderate decline in solar production. Winter presents the most challenging conditions with only 2.38 kWh per day per kW, making it the least productive season for solar energy generation. For optimal year-round performance, solar panels should be installed at a fixed tilt angle of 31 degrees facing south. This angle maximizes total annual electricity production by accounting for the sun's changing position throughout the year and weighting the optimal angles based on actual solar irradiance data.

Local Factors Affecting Solar Production

Several environmental and weather factors in the Elizabethton area can impact solar panel efficiency:

• Appalachian Mountain topography creates frequent cloud cover and fog, particularly in valleys
• High humidity levels common in Tennessee can reduce panel efficiency
• Frequent thunderstorms during spring and summer months
• Occasional ice storms in winter that can damage panels or reduce output
• Heavy pollen loads in spring that coat panel surfaces

Preventative Measures for Better Solar Performance

To maximize solar energy production despite these challenges, several installation strategies prove effective. Proper panel spacing prevents shading between rows and allows better air circulation to keep panels cool during humid conditions. Installing panels with adequate ground clearance helps prevent damage from flooding during heavy rains and allows snow and ice to slide off more easily. Using micro-inverters or power optimizers instead of string inverters helps maintain production even when some panels are partially shaded by clouds or debris. Regular cleaning schedules become particularly important during pollen season and after storms. Anti-reflective coatings can help panels perform better in diffused light conditions common during cloudy weather. Additionally, choosing panels rated for high wind loads protects against damage from severe thunderstorms that are common in the region.

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 Elizabethton

Seasonal solar PV output for Latitude: 36.3445, Longitude: -82.2015 (Elizabethton, 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 Elizabethton, United States

To maximize your solar PV system's energy output in Elizabethton, United States (Lat/Long 36.3445, -82.2015) 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 Elizabethton, 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 Elizabethton, 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 Elizabethton, 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 Elizabethton, 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 Elizabethton, United States

Topographical Features of the Elizabethton Region

Elizabethton sits nestled in the heart of the Appalachian Mountains within Carter County, Tennessee, where the landscape is characterized by rolling hills, steep ridges, and narrow valleys. The city itself occupies a relatively flat river valley formed by the convergence of the Doe River and Watauga River, which creates the beginning of the South Fork Holston River. This river valley provides some of the most level terrain in the immediate area, surrounded by forested mountains that rise dramatically from the valley floor.

The surrounding topography is dominated by the Blue Ridge Mountains to the southeast and the Unaka Mountains to the southwest. These mountain ranges create a complex terrain of ridges and hollows, with elevations varying significantly across short distances. The valley floors typically sit between 1,500 and 1,800 feet above sea level, while the surrounding peaks can reach elevations of 4,000 to 5,000 feet or more.

North and east of Elizabethton, the terrain gradually transitions into the Ridge and Valley province of Appalachia, where the landscape becomes somewhat less rugged with longer, more linear ridges separated by broader valleys. This area features a series of parallel ridges running in a northeast-southwest direction, creating alternating patterns of elevated terrain and valley floors.

Optimal Areas for Large-Scale Solar Development

The most promising locations for large-scale solar photovoltaic installations in the Elizabethton area would be the broader valley floors and gently sloping hillsides with southern exposure. The Watauga River valley extending northeast toward the Virginia border offers some of the most suitable terrain, with relatively flat agricultural land and fewer topographical obstacles that could create shading issues.

Areas along the South Fork Holston River valley, particularly downstream from Elizabethton toward Kingsport, present excellent opportunities for solar development. These locations combine the advantages of gentler topography with proximity to existing electrical infrastructure and transportation networks. The valley floors in these areas are wide enough to accommodate large solar arrays while maintaining appropriate setbacks from waterways and residential areas.

The Ridge and Valley terrain to the north and east of the city also holds potential for solar development, particularly on the south-facing slopes of the ridges where the gradient is not too steep. These elevated positions can offer advantages in terms of reduced fog and atmospheric interference while still maintaining reasonable accessibility for construction and maintenance activities.

Agricultural areas throughout Carter County and extending into adjacent Washington County provide additional opportunities, as many of these locations feature the gentle slopes and open terrain ideal for solar installations. The transition zones between the mountain valleys and the broader Ridge and Valley region offer particularly attractive sites, combining favorable topography with good solar exposure and reasonable proximity to electrical transmission infrastructure.

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.