Solar PV Analysis of Annandale, United States
Annandale, New Jersey, located in the Northern Temperate Zone, offers a moderate potential for solar energy generation throughout the year. The location's seasonal variations in solar output highlight both opportunities and challenges for solar PV installations.
Seasonal Solar Performance
Summer stands out as the peak season for solar energy production in Annandale, with an impressive daily output of 6.05 kWh per kW of installed solar capacity. Spring follows closely behind, generating 5.47 kWh/day. These warmer months present ideal conditions for maximizing solar energy harvesting.
Autumn sees a noticeable decrease in solar output, dropping to 3.54 kWh/day. Winter experiences the most significant decline, with daily production falling to 2.18 kWh/day per kW installed. This substantial seasonal variation underscores the importance of efficient system design to ensure year-round energy sufficiency.
Optimal Panel Positioning
To maximize year-round solar energy production in Annandale, fixed solar panels should be tilted at a 35-degree angle facing south. This optimal angle accounts for the location's latitude and seasonal sun positions, striking a balance between summer and winter performance.
Environmental Considerations
While Annandale's climate is generally conducive to solar energy production, there are some environmental factors to consider:
- Snow accumulation in winter can temporarily reduce panel efficiency
- Tree shading may impact some installations, particularly in residential areas
To mitigate these issues, consider installing panels at a steeper angle to promote snow shedding, and conduct a thorough site assessment to minimize shading impacts. Regular panel cleaning and maintenance can also help ensure optimal performance year-round.
Overall, while Annandale experiences significant seasonal variations in solar output, proper system design and installation practices can help maximize energy production throughout the year, making solar PV a viable renewable energy option for this New Jersey location.
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 Annandale
Seasonal solar PV output for Latitude: 40.6215, Longitude: -74.8854 (Annandale, 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 Annandale, United States
To maximize your solar PV system's energy output in Annandale, United States (Lat/Long 40.6215, -74.8854) 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 Annandale, 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 Annandale, 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 | 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 Annandale, 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 Annandale, 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 Annandale, United States
The area around Annandale, United States, located at latitude 40.6215 and longitude -74.8854, is characterized by gently rolling hills and shallow valleys typical of the Piedmont region. This part of New Jersey features a mix of low-lying areas and modest elevations, creating a landscape that is neither completely flat nor dramatically mountainous.
The topography in this region is the result of ancient geological processes, including the weathering and erosion of once-larger mountains. The terrain generally slopes downward from northwest to southeast, with elevations ranging from about 200 to 800 feet above sea level. Small streams and creeks cut through the landscape, forming shallow valleys between the rolling hills.
Regarding areas nearby that would be most suited for large-scale solar PV (photovoltaic) installations, the gently rolling terrain actually offers some advantages. South-facing slopes would be particularly well-suited for solar panels, as they naturally receive more direct sunlight throughout the day. Open fields or former agricultural lands on these slopes could be ideal locations for solar farms.
However, it's important to note that much of the land in this region is either developed or forested, which could limit the available space for large-scale solar installations. The most suitable areas would likely be found on the outskirts of towns or in rural zones where there are larger open spaces. These areas would need to be relatively free of tall trees or buildings that could cast shadows on the panels.
Additionally, areas near existing electrical infrastructure would be preferable for solar PV projects, as this would reduce the costs associated with connecting to the power grid. Locations close to substations or major power lines could be particularly advantageous.
While the rolling topography can be beneficial for solar energy capture, very steep slopes should be avoided as they can complicate construction and maintenance of solar arrays. Therefore, the most suitable areas would likely be found on gentle to moderate slopes or relatively flat areas that are not prone to flooding.
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 18th of July 2024
Last Updated: Monday 21st of July 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
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