Solar PV Analysis of Qujing, China
Qujing, Yunnan, China, located in the Northern Sub Tropics at coordinates 25.4845, 103.7871, offers a generally favorable environment for solar PV energy generation throughout the year. The location's seasonal electricity output per kW of installed solar varies, providing insights into its potential for solar energy production.
Seasonal Solar Performance
Spring emerges as the most productive season, with an impressive 6.34kWh/day output. Summer follows with a solid 5.10kWh/day, while autumn and winter show slightly lower but still significant outputs at 4.24kWh/day and 3.98kWh/day, respectively. This pattern indicates that Qujing experiences strong solar potential year-round, with peak performance during the spring months.
Optimal Panel Installation
For fixed panel installations in Qujing, Yunnan, the ideal tilt angle to maximize year-round solar production is 23 degrees facing South. This angle has been calculated to optimize energy capture across all seasons, taking into account the Earth's elliptical orbit and the location's specific latitude.
Environmental Considerations
While Qujing's climate is generally conducive to solar energy production, there are some environmental factors to consider:
- Monsoon season: Qujing experiences a monsoon-influenced subtropical climate, which can lead to increased cloud cover and rainfall during certain months, potentially reducing solar output.
- Air pollution: As with many rapidly developing regions in China, air pollution could be a concern, potentially reducing the efficiency of solar panels.
Preventative Measures
To mitigate these potential issues and ensure optimal solar energy production, several preventative measures can be taken during installation:
1. Use high-quality, weather-resistant panels that can withstand heavy rainfall and humidity. 2. Implement a regular cleaning schedule to remove any accumulated dust or pollutants from panel surfaces. 3. Consider installing a solar tracking system to maximize energy capture throughout the day, especially during periods of reduced sunlight. 4. Employ micro-inverters or power optimizers to minimize the impact of partial shading on overall system performance.
By implementing these measures, solar installations in Qujing can take full advantage of the location's strong solar potential while mitigating the effects of any environmental challenges.
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 Qujing
Seasonal solar PV output for Latitude: 25.4845, Longitude: 103.7871 (Qujing, 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 23° South in Qujing, China
To maximize your solar PV system's energy output in Qujing, China (Lat/Long 25.4845, 103.7871) throughout the year, you should tilt your panels at an angle of 23° 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 Qujing, 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 Qujing, China. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 23° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 10° South in Summer | 30° South in Autumn | 40° South in Winter | 19° 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 Qujing, 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 Qujing, China.
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 Qujing, China
The topography around Qujing, China is characterized by a diverse landscape that includes both mountainous regions and flat plains. Qujing is situated in the eastern part of Yunnan Province, which is known for its varied terrain.
The city itself is located in a relatively flat basin surrounded by hills and mountains. To the north and east of Qujing, you'll find the Wumeng Mountains, which are part of the larger Yunnan-Guizhou Plateau. These mountains feature steep slopes and deep valleys, with elevations ranging from about 1,500 to 2,500 meters above sea level.
To the south and west of Qujing, the terrain becomes more gentle, transitioning into rolling hills and plateaus. This area is part of the Yunnan Plateau, which has an average elevation of around 2,000 meters. The plateau is characterized by a mix of flat areas and gentle slopes, interspersed with occasional hills and small mountains.
Regarding areas nearby that would be most suited to large-scale solar PV (photovoltaic) installations, the flat and gently sloping areas of the Yunnan Plateau to the south and west of Qujing would likely be the best candidates. These areas offer several advantages for solar energy production:
- They receive ample sunlight due to their high elevation and relatively clear skies.
- The flat or gently sloping terrain makes it easier and more cost-effective to install large arrays of solar panels.
- There is less risk of shading from nearby mountains or hills, which could reduce the efficiency of solar panels.
- The open spaces in these areas provide room for expansive solar farms without significant disruption to urban areas or agricultural land.
However, it's important to note that specific site selection for solar PV installations would require detailed environmental and geological studies, as well as consideration of factors such as proximity to power grids, local climate conditions, and land use regulations. The mountainous areas to the north and east, while potentially suitable for smaller-scale solar installations, would generally be less ideal for large-scale projects due to their steeper terrain and potential for shading.
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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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Saturday 31st of August 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.
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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.
