Carlisle, Massachusetts, located in the Northern Temperate Zone at latitude 42.5314 and longitude -71.35, presents a mixed picture for year-round solar PV energy generation. The location experiences significant seasonal variations in solar output, which impacts the overall efficiency of solar installations.

Seasonal Solar Performance

Solar energy production in Carlisle peaks during the summer months, with an impressive output of 5.72 kWh per day for each kilowatt of installed solar capacity. Spring follows closely behind, generating 5.37 kWh/day. However, autumn sees a considerable drop to 3.29 kWh/day, while winter performance plummets to a mere 1.95 kWh/day.

These figures indicate that Carlisle's location is most ideal for solar energy generation from late spring through early fall. During this period, longer days and higher sun angles contribute to increased solar panel efficiency. Conversely, the winter months present significant challenges due to shorter days, lower sun angles, and potentially cloudy or snowy conditions.

Optimal Panel Tilt

To maximize year-round solar production in Carlisle, fixed solar panels should be installed at a tilt angle of 37 degrees facing south. This angle optimizes the panels' exposure to sunlight throughout the year, balancing the varying sun angles across seasons.

Environmental and Weather Considerations

Several factors in Carlisle can impact solar energy production:

1. Snow accumulation in winter can significantly reduce panel efficiency.
2. Tree cover and shading from nearby buildings may limit solar exposure.

To mitigate these issues, consider installing panels at a steeper angle to promote snow sliding off, and conduct a thorough site assessment to minimize shading. Regular panel cleaning and maintenance, especially after snowfall, can help maintain optimal performance.

While Carlisle's location presents challenges, particularly in winter, it still offers substantial potential for solar energy generation. With proper planning and installation techniques, residents can harness significant solar power, especially during the more productive spring and summer months.

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 Carlisle

Seasonal solar PV output for Latitude: 42.5314, Longitude: -71.35 (Carlisle, 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 Carlisle, United States

To maximize your solar PV system's energy output in Carlisle, United States (Lat/Long 42.5314, -71.35) 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 Carlisle, 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 Carlisle, 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 Carlisle, 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 Carlisle, United States.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. 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 Carlisle, United States

The topography around Carlisle, Massachusetts, located at 42.5314° North latitude and 71.35° West longitude, is characterized by gently rolling hills and a mix of forested and open areas. This region is part of the New England Upland physiographic province, which features a landscape shaped by glacial activity during the last ice age. The area surrounding Carlisle consists of low-lying hills with elevations typically ranging from 150 to 300 feet above sea level. The terrain is interspersed with numerous small streams, wetlands, and ponds, creating a diverse ecosystem. The Concord River, a major waterway in the region, flows to the east of Carlisle, influencing the local topography and drainage patterns.

Suitable Areas for Large-Scale Solar PV

When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, several factors come into play. Ideal locations for solar farms typically require relatively flat or gently sloping terrain, good sun exposure, and minimal shading from trees or other obstructions. In the vicinity of Carlisle, the most suitable areas for large-scale solar PV would likely be found in open fields or former agricultural lands. These areas often provide the necessary space and sun exposure for efficient solar energy production. Specifically, the rural areas to the west and northwest of Carlisle, extending towards the neighboring towns of Acton and Westford, may offer potential sites for solar development. However, it's important to note that the region's abundant forests and wetlands may limit the availability of large, contiguous areas for solar farms. Additionally, local zoning regulations and conservation efforts aimed at preserving the area's natural beauty and ecological diversity could restrict the development of large-scale solar installations in some locations. Any proposed solar PV projects would need to carefully balance energy production goals with environmental considerations and community preferences. Smaller-scale distributed solar installations on rooftops or in already-developed areas might be more feasible and less controversial alternatives in this region.

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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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.