Swampscott, Massachusetts represents a moderately good location for year-round solar energy generation, though it experiences significant seasonal variation typical of the Northern Temperate Zone climate.
Seasonal Solar Performance
The solar energy output at this location varies dramatically throughout the year. Summer provides the peak performance at 5.90 kWh per day per kW of installed solar capacity, making it an excellent time for solar generation. Spring follows closely behind with 5.51 kWh per day per kW, offering nearly equivalent production levels. Autumn sees a notable decline to 3.36 kWh per day per kW, while winter presents the most challenging conditions with only 1.91 kWh per day per kW of production. This represents about a 70% reduction in output compared to peak summer performance. The ideal times for solar generation at this Massachusetts location are clearly summer and spring, when the combination of longer days and higher sun angles maximize energy production. Winter months require careful energy planning due to significantly reduced output.Optimal Panel Installation
For fixed panel installations in Swampscott, the ideal tilt angle is 37 degrees facing south. This angle maximizes total year-round production by optimizing the panel's exposure to the sun's path throughout all seasons.Local Factors Affecting Solar Production
Several environmental and weather factors in Swampscott can significantly impact solar energy production:- Snow accumulation during winter months can completely block solar panels
- Coastal fog and marine layer effects from nearby Atlantic Ocean
- Ice formation on panels during freezing conditions
- Salt air corrosion from ocean proximity
- Nor'easter storms bringing heavy cloud cover and precipitation
Preventative Measures for Better Performance
To maximize solar production despite these challenges, several installation strategies prove effective:- Install panels at steeper angles (closer to 45-50 degrees) to promote snow shedding
- Use anti-reflective coatings designed for marine environments to resist salt corrosion
- Implement heating elements or snow guards to prevent dangerous ice slides
- Choose mounting systems with marine-grade materials and coatings
- Plan for regular cleaning and maintenance, especially after storms
- Consider microinverters or power optimizers to minimize impact of partial shading from weather
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 Swampscott
Seasonal solar PV output for Latitude: 42.4642, Longitude: -70.9117 (Swampscott, 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 Swampscott, United States
To maximize your solar PV system's energy output in Swampscott, United States (Lat/Long 42.4642, -70.9117) 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 Swampscott, 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 Swampscott, 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 Swampscott, 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 Swampscott, 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 Swampscott, United States
Topography of the Swampscott Area
Swampscott sits along the North Shore of Massachusetts, positioned between the Atlantic Ocean to the east and a series of gentle hills that characterize much of Essex County's coastal region. The town itself occupies a relatively compact area where the land rises gradually from sea level at the shoreline to elevations of approximately 200 feet above sea level inland. The terrain features a mix of rocky outcroppings typical of New England's glacially-carved landscape, interspersed with areas of more level ground that were once salt marshes and wetlands. The immediate coastline consists of rocky headlands and small beaches, with the land becoming more undulating as it moves westward. Small valleys and depressions dot the landscape, many of which contain seasonal streams or were historically filled wetlands. The bedrock consists primarily of granite and other igneous rocks, covered by varying depths of glacial till and marine deposits.Surrounding Regional Topography
Moving inland from Swampscott, the topography becomes more varied and generally rises in elevation. To the west and northwest, the land transitions into the rolling hills of the North Shore region, with elevations reaching 300 to 400 feet above sea level within a few miles. These areas feature a mix of forested hills, cleared agricultural land, and suburban development. The Saugus River valley lies to the southwest, creating a natural corridor of relatively flat terrain that extends inland. North of Swampscott, the coastal plain continues with similar characteristics - a narrow band of lower elevation land bordered by hills further inland. The entire region shows the effects of glacial activity, with numerous drumlins, eskers, and other glacial landforms creating a varied but generally gentle topography.Optimal Areas for Large-Scale Solar Development
The most promising locations for large-scale solar photovoltaic installations would be found inland from Swampscott, where the topography becomes more favorable for such projects. The areas to the west and northwest, particularly around the communities of Lynnfield, Middleton, and North Reading, offer several advantages. These locations feature larger tracts of relatively flat to gently sloping land that have been cleared for agriculture or remain as open fields. The Saugus River valley and similar low-lying areas provide extensive flat terrain that could accommodate substantial solar arrays. These locations benefit from being inland enough to avoid the immediate coastal environment while remaining accessible to existing electrical infrastructure. The slightly higher elevations found 5 to 10 miles inland from Swampscott also present opportunities, particularly on south-facing slopes that would optimize solar panel orientation. Former agricultural areas and large cleared parcels in towns like Topsfield, Boxford, and Georgetown represent some of the best potential sites within a reasonable distance of Swampscott. These areas combine suitable topography with the space requirements needed for utility-scale solar installations, while being positioned away from the more densely developed coastal communities where land costs and zoning restrictions would likely prove prohibitive for large solar projects.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: Thursday 31st of July 2025
Last Updated: Friday 8th 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.




