Clinton, Maryland presents a moderately favorable location for year-round solar energy generation, though with significant seasonal variations typical of the Northern Temperate Zone.
Seasonal Solar Performance
The solar energy output at this location shows clear seasonal patterns. Summer delivers the strongest performance at 6.67 kWh per day per kW of installed capacity, making it the prime solar generation season. Spring follows as the second-best period with 5.91 kWh per day per kW, offering nearly as much energy production as summer. Autumn sees a notable decline to 4.01 kWh per day per kW, while winter presents the most challenging conditions with only 2.44 kWh per day per kW. This winter figure represents less than 40% of summer production, highlighting the importance of seasonal energy planning for solar installations in this area. For optimal year-round energy capture, fixed solar panels should be tilted at 34 degrees facing south. This angle maximizes total annual production by accounting for the sun's changing position throughout the year and weighting for daily solar potential.Local Factors Affecting Solar Production
Several environmental and weather factors in the Clinton, Maryland area can significantly impact solar energy generation:- Humidity and atmospheric moisture: The region's proximity to the Chesapeake Bay and Potomac River creates higher humidity levels that can reduce solar irradiance
- Frequent cloud cover: Mid-Atlantic weather patterns bring regular overcast conditions, particularly during winter months
- Snow accumulation: Winter snowfall can completely block solar panels, eliminating energy production until cleared
- Deciduous tree coverage: The area's abundant mature trees can create significant shading issues, especially when panels are installed at residential properties
- Air quality concerns: Being within the Washington D.C. metropolitan area, air pollution and particulate matter can accumulate on panel surfaces
Preventative Measures for Optimal Performance
Several installation strategies can help maximize solar energy production despite these local challenges: Panel positioning should prioritize southern exposure with minimal shading from nearby structures or vegetation. Consider tree trimming or removal where feasible, and conduct thorough shade analysis before installation to identify the best placement areas. For snow management, install panels with adequate tilt and smooth surfaces that encourage natural snow shedding. Some homeowners invest in panel heating systems or snow removal tools, though the cost-benefit should be carefully evaluated given winter's relatively short duration. Regular maintenance becomes crucial in this environment. Establish a cleaning schedule to remove accumulated dust, pollen, and air pollutants that can reduce panel efficiency. Professional cleaning services may be worthwhile for larger installations. Consider micro-inverters or power optimizers instead of traditional string inverters. These technologies help minimize production losses when individual panels experience shading or other performance issues, ensuring that problems with one panel don't affect the entire system's output.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 Clinton, Maryland
Seasonal solar PV output for Latitude: 38.7651, Longitude: -76.8983 (Clinton, Maryland, 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 Clinton, Maryland, United States
To maximize your solar PV system's energy output in Clinton, Maryland, United States (Lat/Long 38.7651, -76.8983) 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 Clinton, Maryland, 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 Clinton, Maryland, 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 |
|---|---|---|---|
| 22° South in Summer | 43° South in Autumn | 54° South in Winter | 32° 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 Clinton, Maryland, 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 Clinton, Maryland, 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 Clinton, Maryland, United States
Clinton, Maryland sits in the rolling hills of Prince George's County, approximately 10 miles southeast of Washington, D.C. The area is characterized by gently undulating terrain typical of the Mid-Atlantic Coastal Plain, with elevations ranging from about 100 to 300 feet above sea level. The landscape consists of modest hills and shallow valleys carved by small streams and tributaries that eventually drain into the Potomac River to the west.
The topography around Clinton features a mix of wooded areas, agricultural fields, and suburban development. The terrain is generally well-drained, with slopes that are typically gentle to moderate. Most of the surrounding countryside exhibits the characteristic rolling nature of the Piedmont transition zone, where the land gradually descends from the higher elevations to the east toward the Potomac River floodplain.
Optimal Areas for Large-Scale Solar Development
The most suitable locations for large-scale solar photovoltaic installations in the Clinton area would be the open agricultural fields and cleared areas on south-facing slopes. These locations offer the best combination of minimal shading, appropriate grade, and existing land use patterns that could accommodate solar development.
Areas to the south and southeast of Clinton proper present particularly favorable conditions, where the terrain opens up into broader agricultural valleys with gentle southern exposures. These locations benefit from reduced tree cover compared to the more heavily forested areas to the north and east. The relatively flat to gently sloping farmland in these areas would require minimal grading and site preparation.
The corridor along major transportation routes like Branch Avenue and surrounding agricultural zones would be prime candidates for solar development. These areas typically have good access infrastructure already in place and feature the kind of open, relatively level terrain that makes solar installation cost-effective.
Less suitable areas include the steeper slopes found in some of the more heavily dissected terrain to the east, where the land becomes more rolling and forested. The numerous small stream valleys throughout the region, while scenic, present challenges due to their north-facing slopes, increased shading from surrounding ridges, and potential environmental sensitivities associated with riparian zones.
The transitional agricultural landscape surrounding Clinton offers numerous opportunities for solar development, particularly where existing field patterns align with favorable southern exposures and where the topography provides natural drainage without excessive slope that would complicate installation or increase erosion potential.
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 12th of August 2025
Last Updated: Tuesday 12th 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.
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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.




