Neptune City, New Jersey sits in a moderately favorable location for solar energy generation, though it faces some typical challenges for northeastern coastal areas. Located at latitude 40.2066 and longitude -74.0727 in the Northern Temperate Zone, this area experiences significant seasonal variation in solar output.
Seasonal Solar Performance
The solar energy potential varies dramatically throughout the year at Neptune City. Summer provides the strongest performance with 6.02 kWh per day per installed kilowatt, making it the peak season for solar generation. Spring follows as the second-best season at 5.44 kWh per day per kilowatt, offering excellent production as daylight hours increase. Autumn sees a notable drop to 3.48 kWh per day per kilowatt as the sun angle decreases and weather patterns shift. Winter presents the most challenging conditions with only 2.14 kWh per day per kilowatt, representing less than half the summer output. For maximum year-round energy production, solar panels should be installed at a fixed tilt angle of 35 degrees facing south. This optimal angle balances the varying sun positions throughout the seasons to maximize total annual output.Environmental and Weather Challenges
Neptune City's coastal location in New Jersey presents several factors that can impact solar energy production:- Salt air and marine environment: The proximity to the Atlantic Ocean means panels face constant exposure to salt-laden air, which can accelerate corrosion of mounting hardware and electrical components
- Nor'easter storms: These powerful coastal storms bring heavy snow, ice, and high winds that can damage panels or create extended periods of reduced sunlight
- High humidity: Coastal humidity can lead to more frequent condensation and potential electrical issues
- Snow accumulation: Winter storms can cover panels with snow, completely blocking energy production until cleared
Preventative Installation Measures
Several strategies can help maximize solar performance despite these challenges:- Marine-grade components: Use stainless steel or aluminum mounting systems with protective coatings designed for coastal environments
- Enhanced drainage: Install panels with adequate spacing and drainage to prevent water accumulation and ice formation
- Wind-resistant mounting: Employ reinforced mounting systems rated for high wind loads typical of coastal storms
- Regular maintenance schedule: Implement more frequent cleaning and inspection routines to address salt buildup and weather damage
- Steeper tilt angles: Consider slightly steeper angles than the optimal 35 degrees to help snow slide off more easily
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 Neptune City
Seasonal solar PV output for Latitude: 40.2066, Longitude: -74.0727 (Neptune City, 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 Neptune City, United States
To maximize your solar PV system's energy output in Neptune City, United States (Lat/Long 40.2066, -74.0727) 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 Neptune City, 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 Neptune City, 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 | 44° South in Autumn | 55° South in Winter | 33° 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 Neptune City, 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 Neptune City, 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 Neptune City, United States
Topographical Features of Neptune City
Neptune City sits within the coastal plain region of New Jersey, characterized by relatively flat to gently rolling terrain typical of the Atlantic Coastal Plain. The area lies at a modest elevation, generally ranging from sea level to approximately 100 feet above sea level, with the landscape gradually sloping toward the nearby Atlantic Ocean to the east. This low-lying topography creates an environment with minimal steep grades or dramatic elevation changes. The region features a mix of developed suburban areas interspersed with patches of pine barrens vegetation, wetlands, and coastal plain forests. Sandy soils dominate the geological composition, a characteristic feature of New Jersey's coastal counties. These well-draining soils, combined with the relatively flat terrain, create favorable conditions for development and infrastructure projects.Local Terrain Characteristics
The immediate vicinity around Neptune City displays typical coastal plain morphology with gentle undulations rather than pronounced hills or valleys. Small streams and tributaries meander through the landscape, creating occasional low-lying areas and modest drainage patterns. The terrain becomes increasingly flat as one moves eastward toward the Atlantic coastline, while slightly more varied topography appears inland to the west. Existing land use includes residential neighborhoods, commercial corridors, and scattered open spaces. The area benefits from well-established transportation infrastructure, including major highways that traverse the relatively level landscape with minimal grading requirements.Optimal Areas for Large-Scale Solar Development
The flat to gently rolling topography throughout the Neptune City region provides excellent opportunities for large-scale solar photovoltaic installations. Areas immediately west and southwest of Neptune City offer particularly suitable conditions, where larger tracts of undeveloped land combine with favorable terrain characteristics. The coastal plain's naturally level surface eliminates the need for extensive site preparation or grading that would be required in more mountainous regions. This topographical advantage significantly reduces development costs and environmental impact for solar projects. Areas with southern-facing slopes, even gentle ones, provide optimal positioning for solar panel arrays. Former agricultural lands and brownfield sites in the surrounding region represent prime candidates for solar development. These locations typically feature minimal existing vegetation, established access roads, and proximity to electrical transmission infrastructure. The sandy soils characteristic of the area also facilitate easier installation of ground-mounted solar systems and associated electrical infrastructure. Industrial and commercial zones adjacent to Neptune City offer additional opportunities, particularly where large flat roof surfaces or vacant lots could accommodate solar installations. The relatively stable geological conditions of the coastal plain provide reliable foundations for both ground-mounted and building-integrated solar systems.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: Tuesday 29th of July 2025
Last Updated: Thursday 7th of August 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.




