Solar Energy Potential in Southborough, Massachusetts
Southborough, Massachusetts in the United States offers moderate potential for solar PV energy generation, with significant seasonal variations. Located in the Northern Temperate Zone at latitude 42.2924, longitude -71.5275, this location experiences strong seasonal differences in solar production that potential solar adopters should consider. The solar energy production at this location follows a predictable seasonal pattern. Summer months are the most productive, generating approximately 5.72 kWh per day for each kW of installed solar capacity. Spring follows closely behind with 5.37 kWh/day. Production drops considerably in autumn to 3.29 kWh/day, while winter represents the lowest output period with just 1.95 kWh/day per installed kW. For residents considering fixed solar panel installations in Southborough, positioning panels at a 37-degree tilt facing due South will maximize year-round energy production. This specific angle has been calculated to optimize annual solar generation by accounting for the sun's changing position throughout the year at this latitude.Environmental and Weather Factors
Several environmental factors in Southborough can impact solar energy production:- Snow accumulation in winter can temporarily reduce output until panels clear
- Tree coverage is substantial in this New England location and may create shading issues
- Occasional fog or morning mist, particularly in valleys, can delay peak production
- New England's variable weather patterns, including cloudy days, impact consistency
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 Southborough
Seasonal solar PV output for Latitude: 42.2924, Longitude: -71.5275 (Southborough, 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 37° South in Southborough, United States
To maximize your solar PV system's energy output in Southborough, United States (Lat/Long 42.2924, -71.5275) throughout the year, you should tilt your panels at an angle of 37° 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 Southborough, 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 Southborough, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 37° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 26° South in Summer | 47° South in Autumn | 57° South in Winter | 35° 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 Southborough, 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 Southborough, 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 Southborough, United States
The topography around Southborough, Massachusetts, located at 42.2924°N, 71.5275°W, is characterized by gently rolling hills and modest elevation changes typical of the New England region. The area sits within the eastern portion of Worcester County, nestled in what geographers refer to as the New England Upland physiographic province. The landscape features a mix of glacially-influenced terrain, with elevations generally ranging between 300 and 500 feet above sea level. Southborough itself occupies a slightly elevated position compared to some neighboring communities, with several small hills and ridges dotting the landscape. The town is intersected by the Sudbury Reservoir system, creating an undulating terrain with water bodies influencing the local topography. The glacial history of the region has left behind various landforms including drumlins, eskers, and kettle ponds that contribute to the varied relief of the area.
Surrounding Terrain Features
To the west of Southborough, the terrain gradually rises toward the central Massachusetts highlands, with more pronounced hills and elevated plateaus. The eastern direction sees a general decrease in elevation as the landscape transitions toward the coastal lowlands of eastern Massachusetts. Several small river valleys, including those formed by the Sudbury and Assabet Rivers, cut through the region, creating natural depressions in the otherwise moderately elevated terrain. Woodland coverage is substantial throughout the area, with mixed deciduous and coniferous forests occupying much of the undeveloped land. These forested areas typically follow the contours of the hills and ridges, while lower-lying areas may feature wetlands, particularly in the spring months when snowmelt saturates the landscape.Potential Areas for Solar PV Development
When considering large-scale solar photovoltaic installation potential near Southborough, several factors related to topography become important. The most suitable areas would include: Former agricultural lands to the west and southwest of Southborough present some of the best opportunities for solar development. These areas often feature cleared, relatively flat terrain with southern exposure, making them ideal for maximizing solar collection. The gently rolling nature of these lands provides natural drainage while minimizing the need for extensive grading. The slightly elevated plateaus found in neighboring communities like Westborough and Hopkinton offer promising sites for solar arrays. These locations typically have reduced tree coverage compared to the more densely forested hills, providing better solar access. Their elevated position also tends to reduce concerns about morning fog or mist that might accumulate in lower valleys. Several former industrial or commercial properties in the broader region present opportunities for solar development. These brownfield sites often feature large, already-disturbed areas with minimal slope and existing access to electrical infrastructure, reducing development costs and environmental impacts. Areas adjacent to existing transmission corridors, which run through parts of Worcester County, merit consideration for solar development. These corridors already have reduced tree cover and established access to the electrical grid, making them potentially cost-effective locations for solar arrays.Topographical Challenges
Despite these opportunities, developers would need to navigate several topographical challenges specific to the Southborough region. The prevalence of wetlands, particularly in low-lying areas between hills, creates zones where development would be restricted by environmental regulations. The significant forest cover throughout much of the region would necessitate clearing for many potential sites, raising both ecological and permitting concerns. Winter conditions in this New England location introduce additional topographical considerations, as north-facing slopes receive significantly reduced solar radiation during winter months when the sun's path is lower in the southern sky. The moderately hilly terrain can also create challenges for access road construction and maintenance for larger installations. The numerous water bodies, including reservoirs and natural ponds, create protected buffer zones where development is restricted, further limiting available land for large-scale solar projects. Additionally, the glacial till soils common throughout the region can present engineering challenges for foundation work on larger installations. In conclusion, while the topography around Southborough presents certain challenges for large-scale solar development, the varied terrain does offer select opportunities on former agricultural lands, elevated plateaus, and previously developed sites where solar arrays could be effectively deployed with proper planning and engineering.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: Wednesday 30th of April 2025
Last Updated: Thursday 18th 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.




