Holmdel, New Jersey represents a moderately good location for year-round solar energy generation, though with significant seasonal variations typical of the Northern Temperate Zone climate.
Seasonal Solar Performance
The solar energy output at this location shows substantial fluctuation throughout the year. Summer provides the strongest performance at 6.02 kWh per day per kW of installed capacity, making it the peak season for solar generation. Spring follows as the second-best performing season with 5.44 kWh per day per kW, offering nearly comparable output to summer months. Autumn sees a notable decline in production to 3.48 kWh per day per kW, while winter represents the most challenging period with only 2.14 kWh per day per kW. This winter figure is less than half the spring output and roughly one-third of summer production, highlighting the significant seasonal challenge for consistent year-round energy generation.Optimal Installation Configuration
For maximum year-round solar production at Holmdel, fixed solar panels should be installed at a 35-degree tilt angle facing south. This angle has been calculated to optimize total annual energy output by accounting for the sun's changing position throughout the year and weighting for solar irradiance potential at this specific latitude.Environmental and Weather Challenges
Several local factors can significantly impact solar energy production in Holmdel, New Jersey:- Snow accumulation: Winter snowfall can completely block solar panels, eliminating energy production until cleared
- Ice formation: Freezing rain and ice storms can coat panels and reduce efficiency
- Deciduous tree shading: While trees provide less shading in winter when leaves fall, spring and summer shading from mature trees can substantially reduce output
- Coastal weather patterns: The proximity to the Atlantic Ocean can bring frequent cloud cover and storms
- Humid summers: High humidity can create atmospheric haze that reduces solar irradiance
Preventative Installation Measures
To maximize energy production despite these challenges, several installation strategies prove effective: Panel positioning should prioritize steep tilt angles not only for optimal sun exposure but also to encourage snow and ice to slide off naturally. Installing panels with adequate spacing from roof edges and obstacles allows for better airflow and easier maintenance access. Tree management becomes crucial, requiring careful site assessment before installation and potentially trimming or removing vegetation that creates significant shading during peak production months. Professional shade analysis can identify problematic vegetation and optimal panel placement. Selecting high-quality panels with anti-reflective coatings and robust weather sealing helps maintain efficiency in humid conditions and protects against moisture infiltration. Micro-inverters or power optimizers can minimize the impact when individual panels experience shading or snow coverage. Regular maintenance scheduling, particularly before and after winter months, ensures panels remain clean and unobstructed. Installing monitoring systems allows for quick identification of production issues that may indicate snow coverage or other obstructions requiring attention.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 Holmdel
Seasonal solar PV output for Latitude: 40.3451, Longitude: -74.184 (Holmdel, 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 Holmdel, United States
To maximize your solar PV system's energy output in Holmdel, United States (Lat/Long 40.3451, -74.184) 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 Holmdel, 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 Holmdel, 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 | 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 Holmdel, 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 Holmdel, 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 Holmdel, United States
Topographical Features of Holmdel
Holmdel sits within the gently rolling hills of central New Jersey, positioned on what geographers call the Inner Coastal Plain. The terrain around this Monmouth County community is characterized by moderate elevation changes, with the land rising gradually from east to west. The area features a mix of wooded hills, open meadows, and suburban developments that follow the natural contours of the landscape. The topography is dominated by a series of low ridges and shallow valleys that run roughly northeast to southwest, created by ancient glacial activity and subsequent erosion patterns. These ridges typically rise between 100 and 300 feet above sea level, creating a pleasantly undulating landscape that provides natural drainage and scenic variety. The soil composition consists primarily of sandy loams and clay deposits, remnants of the region's geological history.Drainage and Water Features
Several small streams and tributaries wind through the Holmdel area, flowing generally eastward toward the Atlantic Ocean. These waterways have carved gentle valleys between the ridges, creating natural corridors that influence both the local ecosystem and development patterns. Wetland areas are scattered throughout the region, particularly in the lower-lying areas where seasonal flooding occurs. The Swimming River and its tributaries form the primary drainage system for the area, creating a network of small valleys and floodplains that punctuate the otherwise gently rolling terrain. These water features contribute to the area's natural beauty but also create constraints for certain types of development.Optimal Areas for Large-Scale Solar Development
The most promising locations for large-scale solar photovoltaic installations around Holmdel would be the broad, south-facing slopes of the area's ridges and the relatively flat plateau areas that crown many of the hills. These elevated positions offer several advantages, including minimal shading from surrounding terrain and excellent exposure to prevailing weather patterns. The western portions of the region, where the terrain becomes more open and agricultural, present particularly attractive opportunities for solar development. These areas feature larger contiguous parcels of land with gentler slopes, making construction and maintenance more economical. The agricultural fields and pastures in this direction often occupy the most suitable topographical positions for solar arrays. Areas to the south and southwest of Holmdel proper offer additional promise, where the landscape opens up into broader valleys and more extensive flat or gently sloping terrain. These locations benefit from being positioned on higher ground while maintaining the gradual slopes that are ideal for solar panel orientation. The eastern areas, while closer to population centers, tend to be more heavily developed and feature steeper slopes and more fragmented parcels. The northern sections of the region include more forested areas and steeper terrain that would require significant clearing and grading, making them less economically viable for large-scale solar installations.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: Friday 11th of July 2025
Last Updated: Wednesday 6th 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.




