Guangdong, China, located in the Northern Sub Tropics at coordinates 23.5019, 113.2537, offers fairly consistent conditions for solar energy production throughout the year, though with some seasonal variations. This location receives good solar radiation that makes photovoltaic (PV) installations viable year-round.

Seasonal Solar Production

Solar panels in Guangdong generate varying amounts of electricity depending on the season. Summer is the most productive period, yielding 5.34kWh per day for each kilowatt of installed capacity. Autumn follows with 4.56kWh/day, while spring produces 4.23kWh/day. Winter sees the lowest output at 4.08kWh/day per kW installed, though this is still reasonably productive compared to many other regions globally.

The relatively small difference between summer and winter production (about 24%) indicates a fairly consistent solar resource throughout the year, which is advantageous for reliable energy planning.

Optimal Installation Angle

For fixed solar panel installations in Guangdong, the ideal tilt angle to maximize year-round energy production is 22 degrees facing South. This angle optimizes the capture of solar radiation across all seasons, balancing between the higher summer sun and lower winter sun positions.

Environmental Challenges

Despite favorable solar conditions, Guangdong faces several environmental factors that can impact solar production:

• High humidity and frequent rainfall, especially during the monsoon season, can reduce panel efficiency and increase maintenance needs
• Air pollution from industrial activities and urban centers can significantly diminish solar irradiance reaching panels
• Typhoons and strong storms that occasionally hit the region pose physical risks to installations
• Dust and particulate matter accumulation is common in this industrial region

Preventative Measures

To maximize solar production despite these challenges, several preventative measures are recommended:

• Install robust mounting systems designed to withstand typhoon-force winds
• Implement regular cleaning schedules to remove pollution deposits and dust buildup
• Use panels with anti-soiling glass coatings to reduce dust accumulation
• Consider slightly more frequent maintenance during monsoon season
• Install micro-inverters or power optimizers to minimize production losses from partial shading due to pollution

With these considerations addressed, Guangdong offers a viable location for solar PV installations with relatively consistent year-round production, making it suitable for both residential and commercial applications.

Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 319 locations across China. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in China by location

Solar output per kW of installed solar PV by season in Guangdong

Seasonal solar PV output for Latitude: 23.5019, Longitude: 113.2537 (Guangdong, China), 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 22° South in Guangdong, China

To maximize your solar PV system's energy output in Guangdong, China (Lat/Long 23.5019, 113.2537) throughout the year, you should tilt your panels at an angle of 22° 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 Guangdong, China

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 Guangdong, China. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 22° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
8° South in Summer	28° South in Autumn	39° South in Winter	16° 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 Guangdong, China

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 Guangdong, China.

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 Guangdong, China

Guangdong Province is situated in the southernmost part of mainland China, with a diverse topography that transitions from mountainous regions in the north to coastal plains in the south. The coordinates 23.5019°N, 113.2537°E place us near the central part of Guangdong, in proximity to the provincial capital of Guangzhou.

Mountains and Highlands

The northern portions of Guangdong are characterized by rugged mountain ranges that form part of the larger Nanling Mountains system. These mountains create a natural boundary between Guangdong and its northern neighboring provinces. The terrain in these areas features steep slopes, with elevations commonly reaching 500-1,000 meters above sea level, and some peaks exceeding 1,500 meters. The mountainous landscape includes numerous valleys, creating a complex topographical pattern that limits large flat areas.

Central Hills and Basins

Moving southward, the landscape transitions to rolling hills and river basins. This central region contains scattered plateaus and hillocks interspersed with broader valleys. The Pearl River Delta begins to form in this area, with multiple tributaries converging. The terrain becomes increasingly gentle, with elevations typically ranging from 100-400 meters above sea level. The hills in this region are often rounded rather than jagged, reflecting long periods of erosion.

Coastal Plains

The southern portion of Guangdong features extensive coastal plains, particularly around the Pearl River Delta. This delta region is one of China's most densely populated areas and includes major cities like Guangzhou, Shenzhen, and Hong Kong. The terrain here is predominantly flat, with elevations generally below 100 meters. The coastline is highly irregular, featuring numerous bays, estuaries, and offshore islands.

Solar PV Suitability

For large-scale solar photovoltaic installations, several areas around Guangdong present favorable conditions: The coastal plains in western Guangdong, particularly in areas west of the Pearl River Delta, offer extensive flat terrain that would be conducive to large solar installations. These regions have less population density than the eastern delta area while maintaining good solar exposure. Some of the elevated plateaus in the central part of the province provide promising locations for solar farms. These areas often have less agricultural value than the fertile river valleys while offering unobstructed exposure to sunlight. The hills surrounding cities like Shaoguan and Meizhou in the northern parts of the province could accommodate terraced solar installations. While not as ideal as flat terrain for construction purposes, these elevated sites often experience less fog and atmospheric pollution than lowland areas. The region around Leizhou Peninsula in southwestern Guangdong presents another favorable location for solar development. This area features relatively flat terrain and tends to have clearer atmospheric conditions than the more industrialized eastern portions of the province. It's worth noting that while Guangdong has substantial potential for solar energy, the province faces challenges including seasonal monsoons, occasional typhoons, and competing land-use demands from agriculture, industry, and urban development. The most suitable solar sites would balance favorable topography with proximity to existing power infrastructure and consideration of these environmental factors.

China solar PV Stats as a country

China ranks 1st in the world for cumulative solar PV capacity, with 306,973 total MW's of solar PV installed. This means that 6.20% of China's total energy as a country comes from solar PV (that's 13th in the world). Each year China is generating 217 Watts from solar PV per capita (China ranks 24th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in China?

Yes, there are several incentives for businesses wanting to install solar energy in China. These include subsidies from the Chinese government, preferential tax policies, and access to low-interest loans. Additionally, businesses may be eligible for renewable energy certificates (RECs) which can be sold on the open market for additional income.

Do you have more up to date information than this on incentives towards solar PV projects in China? 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.