Oxford, Pennsylvania, located in the Northern Temperate Zone, presents a moderately favorable location for year-round solar energy generation, though with significant seasonal variations that potential solar installers should carefully consider.
Seasonal Solar Performance
The solar energy output at this location shows dramatic seasonal swings. Summer delivers the strongest performance at 6.45 kWh per day per kW of installed capacity, making it the peak season for solar generation. Spring follows as the second-best season with 5.57 kWh per day per kW, offering nearly comparable output to summer months. Autumn sees a notable decline to 3.71 kWh per day per kW, while winter presents the most challenging conditions with only 2.25 kWh per day per kW. This winter output represents less than 35% of summer production, highlighting the substantial seasonal variability typical of northern temperate locations.Optimal Installation Configuration
For maximum year-round energy production at Oxford, Pennsylvania, solar panels should be installed at a fixed tilt angle of 34 degrees facing south. This angle has been calculated to optimize total annual output by accounting for the sun's changing position throughout the year and weighting for actual solar irradiance conditions at this latitude.Local Factors Affecting Solar Production
Several environmental and weather factors in this region can significantly impact solar energy generation:- Winter snow accumulation: Snow can completely block solar panels, eliminating energy production until removed
- Seasonal cloud cover: The region experiences increased cloudiness during autumn and winter months
- Tree coverage and foliage: Deciduous trees provide seasonal shading that varies throughout the year
- Atmospheric moisture: Higher humidity levels can reduce solar irradiance reaching the panels
Preventative Measures for Better Performance
Several installation strategies can help maximize solar output despite these challenges. Installing panels at the optimal 34-degree tilt angle naturally helps with snow shedding, as the steep angle encourages snow to slide off rather than accumulate. Additionally, this tilt angle maximizes winter sun exposure when the sun is lower in the sky. Careful site selection during installation planning can minimize tree shading issues. Conducting a year-round shade analysis ensures panels receive maximum sunlight exposure, particularly during the lower-output autumn and winter seasons when every bit of available sunlight becomes more valuable. Regular maintenance becomes particularly important in this climate. Keeping panels clean and free of debris, especially during autumn leaf-fall season, helps maintain optimal performance. Installing panels with adequate spacing for air circulation can also help reduce the impact of atmospheric moisture on energy production.Overall Assessment
While Oxford, Pennsylvania, cannot be considered an ideal solar location due to its significant seasonal variations and winter weather challenges, it remains viable for solar energy generation. The strong summer and spring performance can offset much of the reduced winter output, and proper installation techniques can help mitigate local environmental factors that might otherwise impede solar production.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 Oxford, Pennsylvania
Seasonal solar PV output for Latitude: 39.78, Longitude: -75.9856 (Oxford, Pennsylvania, 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 Oxford, Pennsylvania, United States
To maximize your solar PV system's energy output in Oxford, Pennsylvania, United States (Lat/Long 39.78, -75.9856) 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 Oxford, Pennsylvania, 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 Oxford, Pennsylvania, 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 |
|---|---|---|---|
| 23° 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 Oxford, Pennsylvania, 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 Oxford, Pennsylvania, 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 Oxford, Pennsylvania, United States
Topographical Features of the Oxford Area
The region around Oxford, Pennsylvania sits within the gently rolling landscape of Chester County in southeastern Pennsylvania. This area forms part of the broader Piedmont physiographic province, characterized by its moderate elevation changes and relatively stable terrain. The topography here consists primarily of low hills and shallow valleys that create a pleasantly undulating countryside without dramatic elevation shifts. The landscape around Oxford typically ranges from approximately 300 to 600 feet above sea level, with most areas falling somewhere in the middle of this range. These modest elevation changes create natural drainage patterns through small creeks and tributaries that eventually flow toward larger water bodies in the region. The terrain is neither mountainous nor completely flat, instead offering the kind of varied but manageable topography that has made this area attractive for both agricultural use and residential development over the centuries.Geological Foundation and Land Stability
The underlying geology of the Oxford area consists largely of metamorphic rocks, including schist and gneiss formations that were created during ancient mountain-building episodes. These rock types provide a stable foundation that has weathered over millions of years to create the current gentle topography. The soils developed on this geological base are generally well-drained and fertile, contributing to the area's historical importance as farmland. This geological stability translates into excellent conditions for large-scale infrastructure development. The bedrock provides solid foundations for substantial installations, while the relatively stable soils minimize concerns about settling or shifting that might affect long-term projects. The absence of significant seismic activity in this region further enhances the suitability of the area for permanent installations requiring consistent positioning and alignment.Agricultural Landscape and Open Spaces
Much of the countryside surrounding Oxford remains in agricultural use, with expansive fields devoted to crops, pasture, and hay production. These agricultural areas create large expanses of relatively flat or gently sloping open land with minimal obstructions. The farming tradition in this region has resulted in fields that are often quite substantial in size, having been consolidated over generations of agricultural use. The agricultural character of the landscape means that many areas have already been cleared of trees and maintained as open space for decades or even centuries. This existing land use pattern creates ideal conditions for alternative uses that require large, unobstructed areas with good access to transportation infrastructure and utility connections.Optimal Areas for Large-Scale Solar Development
The most promising locations for large-scale solar installations around Oxford would be the expansive agricultural fields that occupy much of the surrounding countryside. These areas offer several key advantages including their existing cleared status, generally southern-facing slopes that maximize exposure throughout the day, and relatively flat to gently sloping terrain that simplifies installation and maintenance procedures. Particularly well-suited areas include the broad agricultural valleys that stretch between the low ridges characteristic of this region. These locations typically provide excellent access to existing road networks while offering the large contiguous areas necessary for utility-scale solar development. The gentle slopes found in many of these valleys provide natural drainage while maintaining optimal positioning for solar collection. The elevated areas and ridgetops in the region, while offering good exposure, may be less suitable for the largest installations due to their more irregular terrain and potential visual impact concerns. However, the broad upland areas that are not quite at ridge level often provide excellent compromise locations with good exposure and adequate space for substantial installations. Areas near existing agricultural operations may offer additional advantages through established access roads and proximity to electrical infrastructure that already serves farm operations. The rural nature of much of the surrounding landscape also means that large installations would face fewer conflicts with residential development or other intensive land uses.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
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Tuesday 22nd of July 2025
Last Updated: Thursday 7th of August 2025
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Compare this location to others worldwide for solar PV potential
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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.




