Parsippany, New Jersey, located in the Northern Temperate Zone, offers a moderate potential for solar energy generation throughout the year. The location's solar production varies significantly across seasons, with peak performance during summer months and reduced output in winter.
Seasonal Solar Performance
Summer stands out as the most productive season, with an average daily output of 6.05 kWh per kW of installed solar capacity. Spring follows closely, generating 5.47 kWh/day. Autumn sees a noticeable decrease to 3.54 kWh/day, while winter experiences the lowest production at 2.18 kWh/day.
The substantial difference between summer and winter output highlights the impact of seasonal variations on solar energy production in Parsippany. This pattern is typical for locations in the Northern Temperate Zone, where daylight hours and sun angle change significantly throughout the year.
Optimal Panel Installation
To maximize year-round solar energy production in Parsippany, fixed solar panels should be installed at a tilt angle of 35 degrees facing south. This angle optimizes the panels' exposure to sunlight across all seasons, balancing the high summer sun with the lower winter sun angle.
Environmental and Weather Considerations
Several factors can affect solar production in Parsippany:
- Snow accumulation in winter can temporarily reduce panel efficiency.
- Cloud cover, particularly during spring and autumn, may impact daily output.
- Tree shading could be a concern in this suburban area.
To mitigate these issues, consider installing panels at a steeper angle to promote snow sliding, using micro-inverters or power optimizers to minimize the impact of partial shading, and ensuring proper tree trimming around the solar array.
Conclusion
While Parsippany's location is not ideal for year-round solar production due to significant seasonal variations, it still offers good potential, especially from late spring through early fall. With proper installation techniques and maintenance, solar PV systems can provide substantial energy benefits to residents and businesses in this New Jersey town.
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 Parsippany
Seasonal solar PV output for Latitude: 40.8617, Longitude: -74.4104 (Parsippany, 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 35° South in Parsippany, United States
To maximize your solar PV system's energy output in Parsippany, United States (Lat/Long 40.8617, -74.4104) throughout the year, you should tilt your panels at an angle of 35° 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 Parsippany, 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 Parsippany, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 35° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 24° South in Summer | 45° South in Autumn | 56° South in Winter | 34° 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 Parsippany, 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 Parsippany, 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 Parsippany, United States
The topography around Parsippany, New Jersey, is characterized by a mix of gently rolling hills, shallow valleys, and low-lying plains. This area is part of the Piedmont region, which lies between the flat coastal plain to the east and the more rugged Appalachian Mountains to the west. The landscape is dotted with numerous small lakes, ponds, and streams, creating a diverse and picturesque environment. Parsippany itself sits at an elevation of about 300 feet above sea level, with the surrounding terrain varying in height. To the north and west, the land gradually rises towards the higher elevations of the New Jersey Highlands, while to the south and east, it slopes gently towards the Passaic River and its associated lowlands. The area's topography has been shaped by glacial activity during the last ice age, resulting in a mix of glacial deposits, including till and outwash plains. This has created a landscape with subtle variations in elevation and soil composition, which influences local vegetation and land use patterns.
Potential Areas for Large-Scale Solar PV
When considering areas nearby that would be most suited to large-scale solar PV installations, several factors come into play: 1. Open, flat land: The most ideal locations for solar farms are typically large, open areas with minimal slope. In the vicinity of Parsippany, this might include former agricultural lands or unused industrial sites in the surrounding townships. 2. South-facing slopes: Gentle, south-facing slopes can be advantageous for solar installations as they receive more direct sunlight throughout the day. Some of the hillsides to the north of Parsippany might offer suitable locations. 3. Brownfield sites: Repurposing brownfield sites, such as former landfills or abandoned industrial areas, for solar installations is becoming increasingly popular. There may be such sites in the broader Morris County area that could be suitable. 4. Large rooftops: While not strictly topographical, the numerous commercial and industrial buildings in and around Parsippany offer potential for large-scale rooftop solar installations. It's important to note that while the topography around Parsippany is generally favorable for solar PV, the dense population and development in the area may limit the availability of large, contiguous parcels of land. Additionally, any potential sites would need to be evaluated for factors such as proximity to electrical infrastructure, local zoning regulations, and environmental considerations.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 October 2024
Last Updated: Monday 21st of July 2025
Tell Us About Your Work
We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.
Feeling generous?
Share this with your friends!

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.




