Clairton, Pennsylvania, United States is a location with moderate potential for solar energy generation, experiencing significant seasonal variations in solar production throughout the year. Situated in the Northern Temperate Zone, this location demonstrates the typical solar patterns expected for its latitude.
Seasonal Solar Production
Solar panel systems in Clairton produce varying amounts of electricity depending on the season. During summer, production reaches its peak at 6.07 kWh per day for each kilowatt installed. Spring follows as the second most productive season with 5.19 kWh/day. Autumn shows a substantial decrease to 3.35 kWh/day, while winter production drops dramatically to only 1.81 kWh/day per kilowatt of installed capacity.
This pattern creates a nearly 3.5-fold difference between the best and worst seasons, with summer producing more than three times the electricity of winter months. The substantial seasonal variation means that annual production is heavily weighted toward the warmer months.
Optimal Panel Installation
For fixed solar panel installations in Clairton, the ideal tilt angle to maximize year-round production is 34 degrees facing South. This angle optimizes the annual solar harvest by balancing seasonal variations and accounting for the Earth's elliptical orbit.
Environmental and Weather Considerations
Several factors may impact solar production in Clairton:
- Western Pennsylvania experiences significant cloud cover and precipitation throughout the year, particularly during winter months, which can reduce solar generation.
- Clairton's industrial history as a steel town may result in occasional air quality issues that could slightly diminish solar irradiance.
- Snow accumulation during winter months can temporarily cover panels, further reducing the already low winter production.
- Tree coverage and surrounding hills may create shading issues at specific sites.
Preventative Measures
To maximize solar production in Clairton despite these challenges, consider these installation strategies:
- Install panels with snow-shedding capabilities and consider a slightly steeper winter tilt angle if seasonal adjustments are possible.
- Implement regular cleaning schedules to address any industrial particulate buildup.
- Conduct thorough shade analysis before installation to avoid tree and building shadows.
- Consider microinverters or power optimizers to minimize the impact of partial shading.
- Ensure adequate spacing between panel rows to prevent self-shading, especially during winter when sun angles are lower.
While Clairton isn't ideal for year-round solar production due to its significant seasonal variations, properly designed systems can still provide substantial electricity generation, particularly from March through October when conditions are most favorable.
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 Clairton
Seasonal solar PV output for Latitude: 40.2923, Longitude: -79.8817 (Clairton, 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 34° South in Clairton, United States
To maximize your solar PV system's energy output in Clairton, United States (Lat/Long 40.2923, -79.8817) throughout the year, you should tilt your panels at an angle of 34° 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 Clairton, 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 Clairton, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 34° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 24° South in Summer | 44° South in Autumn | 55° South in Winter | 33° 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 Clairton, 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 Clairton, United States.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - 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 Clairton, United States
Clairton, Pennsylvania is situated in the Monongahela River Valley, approximately 15 miles southeast of Pittsburgh. The topography of this region is characterized by rolling hills and steep valleys typical of the Appalachian Plateau. Clairton itself sits on the eastern bank of the Monongahela River, with elevations ranging from about 760 feet near the riverfront to approximately 1,200 feet on the surrounding ridges. The landscape around Clairton features significant variations in elevation, with numerous hollows and ravines cutting through the terrain. This topographical complexity is a result of millions of years of erosion by the Monongahela River and its tributaries, which have carved deep valleys into the ancient sedimentary rock layers. The steeper hillsides are often wooded, while flatter areas have historically been developed for residential, commercial, and industrial purposes.
Surrounding Terrain Features
To the east of Clairton, the terrain rises into a series of higher ridges that form part of the Allegheny Mountains. These ridges generally run in a northeast to southwest direction, following the geological structure of the Appalachian range. The western side of Clairton borders the Monongahela River, which flows northward to join the Allegheny River in Pittsburgh, forming the Ohio River. The region's topography has been significantly altered by human activity, particularly coal mining and steel production. Clairton has a long history as an industrial center, with the Clairton Coke Works being a prominent feature of the landscape. This industrial heritage has left its mark on the local topography through mine subsidence areas, slag heaps, and industrial facilities.Solar PV Potential in the Region
For large-scale solar photovoltaic (PV) installations, several factors related to topography must be considered, including slope, aspect (the direction a slope faces), and shading from surrounding terrain. The most suitable areas for large-scale solar PV near Clairton would be: 1. Reclaimed mine lands and brownfields: The region has numerous former industrial and mining sites that offer relatively flat, open spaces. These areas often have minimal ecological value in their current state and could be repurposed for solar energy production. Several miles south of Clairton, there are larger reclaimed mine areas that provide more extensive flat terrain. 2. South-facing slopes: The ridges to the east and southeast of Clairton contain south-facing slopes that receive more direct sunlight throughout the year. While steeper slopes present construction challenges, moderate south-facing inclines can actually be advantageous for solar collection in northern latitudes. 3. Agricultural plateaus: Moving further east from Clairton into Westmoreland County, the terrain opens up into more extensive plateau areas with agricultural use. These relatively flat, open spaces would be well-suited for larger solar installations. 4. River valley industrial corridors: Along the Monongahela River valley, there are industrial corridors with underutilized land that could be repurposed. While these areas may have some air quality considerations due to nearby industry, they often have existing grid infrastructure that could support solar development. The immediate vicinity of Clairton presents challenges for very large solar installations due to the hilly terrain, dense development patterns, and extensive forest cover. The most promising locations would likely be found 5-15 miles from the city center, particularly to the east and south where larger tracts of suitable land exist. These areas offer a better combination of appropriate slope, aspect, and land availability while still being close enough to existing 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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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Tuesday 29th of April 2025
Last Updated: Monday 15th of September 2025
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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.




