Siler City, North Carolina, located at latitude 35.7235° and longitude -79.4622° in the Northern Temperate Zone, presents a moderately favorable location for solar PV energy generation throughout the year. The seasonal electricity output varies significantly, with the highest production occurring during summer months.

Seasonal Solar Production

Solar panels in Siler City demonstrate clear seasonal patterns in energy production. Summer stands out as the peak production period with 6.61kWh per day for each kilowatt of installed capacity. Spring follows closely behind with 5.99kWh/day, making spring and summer the ideal times for solar generation at this location.

Production decreases notably during autumn, generating 4.40kWh/day, while winter shows the lowest output at just 2.75kWh/day per installed kilowatt. This winter reduction represents less than half of the summer production, highlighting the seasonal variability at this location.

Optimal Panel Installation

For fixed solar panel installations in Siler City, the ideal tilt angle to maximize year-round energy production is 31 degrees facing South. This specific angle optimizes the panels' ability to capture sunlight throughout the year, accounting for the location's latitude and seasonal sun positions.

Environmental and Weather Considerations

Several factors may impact solar production in Siler City. The region experiences occasional severe weather events including hurricanes and thunderstorms that can temporarily reduce solar output. Tree coverage is also substantial in North Carolina, potentially creating shading issues for some installations.

Humidity levels in this part of North Carolina can be high, which may slightly reduce panel efficiency compared to drier climates. Additionally, pollen during spring months can accumulate on panels, potentially decreasing their effectiveness.

Preventative Measures

To maximize solar production despite these challenges, several preventative measures can be implemented:

• Install panels with sufficient elevation to avoid shading from trees and structures
• Use microinverters or power optimizers to minimize the impact of partial shading
• Implement regular cleaning schedules, especially during pollen season
• Consider weather-resistant mounting systems designed to withstand high winds
• Install panels with anti-soiling coatings that reduce dust and pollen accumulation

With these considerations addressed, Siler City can be a worthwhile location for solar PV installation, particularly taking advantage of the strong spring and summer production periods to offset the reduced winter output.

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 Siler City

Seasonal solar PV output for Latitude: 35.7235, Longitude: -79.4622 (Siler 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 31° South in Siler City, United States

To maximize your solar PV system's energy output in Siler City, United States (Lat/Long 35.7235, -79.4622) throughout the year, you should tilt your panels at an angle of 31° 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 Siler 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 Siler City, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 31° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
20° South in Summer	41° South in Autumn	51° South in Winter	28° 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 Siler 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 Siler City, 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 Siler City, United States

The topography around Siler City, North Carolina presents a gently rolling landscape characteristic of the Piedmont region of the southeastern United States. Situated in Chatham County, Siler City rests in an area where the terrain transitions from the flatter coastal plains to the east and the more dramatic Blue Ridge Mountains to the west. The landscape features modest hills and shallow valleys, with elevations generally ranging between 500 and 700 feet above sea level. The area is marked by gentle slopes rather than steep inclines, creating a pleasantly undulating terrain. Several small streams and creeks flow through the vicinity, including Rocky River and its tributaries, which have gradually shaped the local topography through erosion over millennia.

Vegetation and Land Use

The natural vegetation around Siler City consists of mixed hardwood forests interspersed with cleared agricultural land and pastures. Many hillsides and steeper slopes retain their forest cover, while flatter areas have historically been converted to agricultural use or developed for residential and commercial purposes.

Suitable Areas for Solar PV Development

For large-scale solar photovoltaic installations, the most promising locations near Siler City would be the gently sloping, south-facing hillsides that offer optimal sun exposure throughout the day. These areas provide natural drainage while maximizing solar collection potential. Particularly suitable are former agricultural lands or cleared areas that: - Feature slopes of less than 5 degrees - Have southern or southeastern exposure - Avoid low-lying areas prone to flooding or morning fog - Provide reasonable proximity to existing electrical infrastructure The rural areas to the south and southeast of Siler City offer especially promising conditions, where the topography provides good solar exposure without significant shading from hills or mountains. These locations combine favorable terrain with relatively sparse population density, making them ideal candidates for larger installations. The northeastern portions of Chatham County also contain several expanses of gently rolling terrain that would accommodate solar arrays with minimal grading requirements. These areas benefit from the Piedmont's characteristic mix of open land and modest elevation changes that can be advantageous for solar positioning.

Topographical Considerations

While the rolling nature of the Piedmont presents some challenges for very large installations that might require extensive grading, the moderate nature of the slopes around Siler City generally means that site preparation costs remain reasonable. The soil composition, primarily clay-based with good stability, provides adequate support for solar infrastructure without excessive foundation requirements. The numerous small plateaus and gradually sloping fields scattered throughout the region offer natural "pads" for solar development that would require minimal alteration of the existing landscape. This characteristic makes the area particularly attractive for solar projects seeking to minimize environmental disruption while maximizing energy production potential.

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.