Cumberland, Kentucky, located in the Northern Temperate Zone at coordinates 36.9682, -82.9787, presents a moderately favorable location for year-round solar photovoltaic energy generation, though with significant seasonal variations that potential solar installers should carefully consider.

Seasonal Solar Performance

The location experiences its peak solar production during summer months, generating 6.55 kWh per day per kW of installed solar capacity. Spring follows as the second-best season with 5.64 kWh per day per kW, making these warm months ideal for maximizing solar energy output. Autumn production drops to 4.18 kWh per day per kW, while winter presents the most challenging conditions with only 2.38 kWh per day per kW of production. This seasonal pattern means that Cumberland experiences nearly three times more solar production in summer compared to winter months. The substantial variation suggests that residents considering solar installation should plan for significantly reduced energy generation during the colder months of the year.

Optimal Panel Installation

For maximum year-round energy production at this Cumberland location, solar panels should be installed at a fixed angle of 32 degrees tilted toward the south. This optimal angle is calculated by analyzing daily solar elevation angles throughout the year, determining optimal panel positioning for each day, and weighting these angles based on actual solar irradiance data while accounting for Earth's elliptical orbit around the sun.

Local Environmental and Weather Challenges

Cumberland, Kentucky faces several environmental factors that can significantly impact solar panel performance and require careful consideration during installation:

• Appalachian Mountain Topography: The surrounding mountainous terrain can create shading issues, particularly during winter months when the sun sits lower in the sky
• Heavy Snow and Ice: Winter weather conditions can accumulate on panels, blocking sunlight and reducing efficiency
• High Humidity and Fog: The region's climate can produce atmospheric moisture that reduces solar irradiance
• Severe Weather Events: Thunderstorms, hail, and high winds common to the region can damage installations

Preventative Installation Measures

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

• Strategic Site Selection: Choose installation locations with minimal shading from surrounding hills, trees, or structures, particularly avoiding north-facing slopes
• Enhanced Mounting Systems: Use robust mounting hardware designed to withstand high wind loads and potential ice accumulation
• Steeper Tilt Angles: Consider slightly steeper panel angles than the calculated 32 degrees to promote snow shedding
• Regular Maintenance Access: Design installations with safe access points for cleaning and snow removal
• Micro-inverters or Power Optimizers: Install equipment that minimizes production losses when individual panels are partially shaded or snow-covered

The 32-degree south-facing tilt angle helps naturally shed snow and debris while optimizing sun exposure throughout the changing seasons. Professional installation should include weather-resistant components rated for the region's temperature extremes and precipitation levels. While Cumberland's location offers decent solar potential, particularly during spring and summer months, the significant winter production decline and regional weather challenges make it essential to size systems appropriately and implement protective measures to ensure reliable long-term performance.

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 Cumberland

Seasonal solar PV output for Latitude: 36.9682, Longitude: -82.9787 (Cumberland, 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 32° South in Cumberland, United States

To maximize your solar PV system's energy output in Cumberland, United States (Lat/Long 36.9682, -82.9787) throughout the year, you should tilt your panels at an angle of 32° 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 Cumberland, 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 Cumberland, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 32° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
21° South in Summer	42° South in Autumn	52° South in Winter	30° 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 Cumberland, 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 Cumberland, 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 Cumberland, United States

Topography of Cumberland, Kentucky

Cumberland sits nestled in the rugged Appalachian Mountains of southeastern Kentucky, where the landscape is characterized by steep ridges, narrow valleys, and heavily forested terrain. The town itself occupies a relatively flat area along the Cumberland River, but the surrounding region features dramatic elevation changes typical of the Cumberland Plateau and Pine Mountain geological formations.

The immediate vicinity of Cumberland is dominated by Pine Mountain to the southeast, which rises sharply from the valley floor and creates a distinctive barrier along the Kentucky-Virginia border. This mountain ridge reaches elevations exceeding 3,000 feet, while Cumberland itself sits at approximately 1,200 feet above sea level. The terrain north and west of the town consists of rolling hills and smaller ridges that are part of the broader Appalachian foothills system.

Dense mixed hardwood and coniferous forests blanket most of the mountainous areas, with occasional clearings where mining operations or agricultural activities have created openings in the canopy. The river valleys, including the Cumberland River valley where the town is located, tend to be narrow with steep sides, limiting the availability of large flat areas suitable for development.

Solar Development Potential in the Region

The mountainous topography around Cumberland presents both challenges and opportunities for large-scale solar photovoltaic installations. The steep terrain and heavy forest cover that characterize much of the region would require significant site preparation and clearing, making development costs substantially higher than in flatter, more open areas.

The most promising locations for solar development would be the reclaimed surface mining sites scattered throughout the region. These areas, known locally as mountaintop removal sites, have already been cleared and flattened, creating relatively large open spaces with good southern exposure. Many of these former mining areas are located on ridge tops and upper slopes, which can provide excellent solar access with minimal shading from surrounding terrain.

Agricultural areas in the broader valleys, particularly those extending northeast and southwest along the Cumberland River corridor, could also accommodate solar installations. While these valley locations are more limited in size compared to the reclaimed mining sites, they offer the advantage of existing road access and proximity to electrical infrastructure.

The rolling hills to the north and northwest of Cumberland, while less dramatically steep than the Pine Mountain area, could support solar development on south-facing slopes that have been cleared for agriculture or previous development. These areas would require careful site selection to ensure optimal sun exposure and minimal shading from adjacent ridges and tree lines.

Areas to avoid for large-scale solar development would include the heavily forested steep slopes of Pine Mountain and similar ridges, where the combination of difficult access, extreme grades, and environmental sensitivity would make development impractical. The narrow river valleys, while offering flat terrain, are often too constrained by surrounding hills to provide the extensive open areas needed for utility-scale solar installations.

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!

Citation Guide

Article Details for Citation

Tell Us About Your Work

We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.

Feeling generous?

Share this with your friends!

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.