Rockland, Massachusetts, United States, located at 42.1292° N, -70.9134° W in the Northern Temperate Zone, offers a moderately favorable location for solar PV energy generation throughout the year, though with significant seasonal variations.

Seasonal Solar Production

Solar energy output at this location shows pronounced seasonal differences. Summer is the most productive season, generating approximately 5.87 kWh per day for each kilowatt of installed capacity. Spring follows closely with 5.51 kWh/day per kW. Production drops considerably in autumn to 3.36 kWh/day per kW, while winter sees the lowest output at just 1.91 kWh/day per kW.

This seasonal pattern makes Rockland most suitable for solar energy production from late spring through early fall, with May through September likely offering the most consistent and substantial energy yields. The significant drop in winter production means that households or businesses relying heavily on solar would need alternative energy sources or substantial battery storage during the colder months.

Optimal Panel Installation

For fixed-panel installations in Rockland, the ideal tilt angle to maximize year-round solar production is 36 degrees facing South. This angle has been calculated taking into account the location's latitude, the sun's position throughout the year, and weighted by the daily PV potential based on NASA's solar irradiance data.

Environmental and Weather Considerations

Several factors in Rockland could potentially impact solar production:

• Snow accumulation during winter months can significantly reduce output if panels become covered, requiring regular clearing or the installation of panels at steeper angles to promote snow sliding
• New England's cloudy and overcast conditions, particularly common in winter and early spring, will reduce generation capability
• Coastal proximity may expose panels to salt spray and moisture, potentially accelerating corrosion if not properly protected
• Tree cover in this heavily wooded region can create shading issues, necessitating careful site selection and possibly tree trimming

Preventative Measures

To maximize solar production in Rockland, consider these preventative measures during installation:

• Use marine-grade components and protective coatings to prevent salt-air corrosion
• Install micro-inverters or power optimizers to minimize the impact of partial shading
• Consider snow guards or a slightly steeper tilt angle in winter-only arrays to facilitate snow shedding
• Implement a regular maintenance schedule including panel cleaning, especially after winter storms
• Ensure proper tree management and site selection to minimize shading throughout the year

With these considerations addressed, Rockland can be a viable location for solar PV, particularly when system sizing accounts for the significant winter production decrease.

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 Rockland

Seasonal solar PV output for Latitude: 42.1292, Longitude: -70.9134 (Rockland, 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 36° South in Rockland, United States

To maximize your solar PV system's energy output in Rockland, United States (Lat/Long 42.1292, -70.9134) throughout the year, you should tilt your panels at an angle of 36° 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 Rockland, 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 Rockland, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 36° 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	46° 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 Rockland, 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 Rockland, 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 Rockland, United States

The topography around Rockland, Massachusetts features gently rolling terrain characteristic of the southeastern New England coastal plain. Situated approximately 20 miles southeast of Boston, Rockland lies in Plymouth County in what geologists refer to as the Seaboard Lowland section of the New England physiographic province. The landscape was heavily influenced by glacial activity during the last ice age, resulting in a mix of low hills, shallow valleys, and scattered wetlands. The elevation in Rockland averages around 150 feet (46 meters) above sea level, with modest variations throughout the area. The terrain generally slopes gradually from northwest to southeast. Several small streams and brooks traverse the region, including French's Stream, which flows through parts of Rockland before joining the North River watershed system.

Surrounding Landforms

To the east of Rockland, the land gradually descends toward the Atlantic Ocean, approximately 10 miles away. The coastal influence becomes more pronounced in this direction, with increasing marshlands and estuaries. The Blue Hills reservation lies to the northwest, representing one of the more significant elevated features in the greater region, with Great Blue Hill reaching 635 feet (194 meters). The western and southern borders of Rockland share similar topographical characteristics with neighboring towns like Hanover and Abington - a mix of woodland, scattered wetlands, and modest hills. Glacial erratics (large boulders deposited by retreating glaciers) can be found throughout the region, adding character to the landscape.

Solar PV Suitability

For large-scale solar photovoltaic installations, several nearby areas present favorable conditions based on topographical considerations. The most suitable locations would include: Former industrial sites and brownfields in the region offer flat, already-developed land with minimal ecological disruption. Rockland itself has several former manufacturing areas that could be repurposed for solar energy production. Areas to the south and west of Rockland, particularly in parts of Hanson and Halifax, feature more extensive open spaces with gentle south-facing slopes that would maximize solar collection efficiency. These locations have fewer dense forest stands and wetland constraints. The relatively flat terrain along portions of Route 3 corridor provides opportunities for solar development with good accessibility. These areas often have existing transmission infrastructure nearby, reducing interconnection costs. Areas to avoid would include the numerous wetlands and water bodies scattered throughout the region, as well as conservation lands and more densely forested sections. The eastern coastal areas, while receiving good solar exposure, contain more sensitive ecological systems and face greater regulatory hurdles. The modest hills found throughout the region can actually benefit solar installations when they have southern exposures, as they provide natural tilting toward the sun's path. However, north-facing slopes would significantly reduce collection efficiency and should be avoided. Overall, the topography around Rockland presents moderate opportunities for large-scale solar development, with the most promising sites being previously developed areas, abandoned commercial properties, and the more open, gently sloping terrain found in the southwestern portions of the 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.