Jiujiang, Jiangxi, China, situated in the Northern Sub Tropics at coordinates 29.7151, 115.9916, offers a relatively favorable location for solar PV energy generation throughout the year. The city experiences varying levels of solar potential across different seasons, providing opportunities for consistent electricity production.

Seasonal Solar Performance

Summer stands out as the most productive season for solar energy in Jiujiang, Jiangxi, with an impressive output of 5.02 kWh per day for each kilowatt of installed solar capacity. This high yield is due to longer daylight hours and more direct sunlight during the summer months.

Autumn follows as the second-best season, generating 4.19 kWh per day. While the days begin to shorten, there's still ample sunlight for significant energy production.

Spring ranks third, with a daily output of 3.56 kWh. As temperatures rise and days lengthen, solar panels become increasingly efficient compared to the winter months.

Winter sees the lowest solar generation at 3.07 kWh per day. However, this output is still considerable and contributes to year-round energy production.

Optimal Panel Installation

For fixed panel installations in Jiujiang, Jiangxi, the ideal tilt angle to maximize year-round solar production is 27 degrees facing South. This angle is calculated based on the location's latitude and seasonal sun positions, ensuring optimal exposure throughout the year.

Environmental Considerations

While Jiujiang's climate is generally conducive to solar energy production, there are some factors that could potentially impact efficiency:

• High humidity levels, especially during the summer monsoon season, may slightly reduce panel efficiency.
• Occasional haze or air pollution could diminish sunlight reaching the panels.

To mitigate these issues, regular cleaning of solar panels is recommended to remove any dust or pollutant buildup. Additionally, using high-quality, humidity-resistant panels and ensuring proper ventilation during installation can help maintain optimal performance.

Overall, Jiujiang presents a promising location for solar PV energy generation, with strong potential throughout the year and particularly excellent conditions during the summer months.

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 Jiujiang

Seasonal solar PV output for Latitude: 29.7151, Longitude: 115.9916 (Jiujiang, 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 27° South in Jiujiang, China

To maximize your solar PV system's energy output in Jiujiang, China (Lat/Long 29.7151, 115.9916) throughout the year, you should tilt your panels at an angle of 27° 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 Jiujiang, 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 Jiujiang, China. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 27° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
14° South in Summer	34° South in Autumn	45° South in Winter	22° 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 Jiujiang, 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 Jiujiang, 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 Jiujiang, China

Jiujiang, located in China's Jiangxi Province, is surrounded by diverse and striking topography. The city sits at the northern edge of Jiangxi, nestled between the Yangtze River to the north and the imposing Lushan Mountain range to the south. This unique geographical position creates a landscape that transitions from flat, low-lying areas near the river to increasingly hilly and mountainous terrain as one moves southward. The immediate vicinity of Jiujiang is characterized by a mix of gently rolling hills and expansive plains. The Yangtze River valley provides fertile alluvial soil, supporting extensive agricultural activities. As you move away from the river, the terrain gradually becomes more undulating, with scattered hills and small valleys dotting the landscape. To the south, the topography becomes dramatically more rugged as it approaches the Lushan Mountains. These mountains, famous for their scenic beauty and cultural significance, rise steeply from the surrounding plains, reaching heights of over 1,400 meters (4,600 feet). The mountainsides are adorned with lush forests, deep ravines, and numerous waterfalls, creating a stark contrast to the flatter areas near the city.

Suitable Areas for Large-Scale Solar PV

When considering areas near Jiujiang for large-scale solar photovoltaic (PV) installations, the most suitable locations would likely be found in the flatter, open spaces to the north and east of the city. These areas offer several advantages for solar energy production: Firstly, the relatively flat terrain of the Yangtze River valley provides ample space for the installation of large solar arrays without the need for extensive land preparation. This reduces construction costs and simplifies maintenance procedures. Secondly, these areas typically receive more consistent sunlight throughout the day compared to the mountainous regions to the south. The absence of significant geographical obstructions means fewer shadows and more uniform solar exposure. Additionally, the proximity to the city and existing infrastructure could facilitate easier grid connection and transportation of materials during the construction and maintenance phases of a solar project. However, it's important to note that some of these flat areas may currently be used for agriculture, which could present land-use conflicts. Any large-scale solar development would need to carefully balance energy production goals with the preservation of valuable agricultural land. While the mountainous areas to the south offer some potential for solar energy, particularly on south-facing slopes, the challenging terrain and potential environmental impacts make these locations less ideal for large-scale installations. These areas might be better suited for smaller, distributed solar projects that can take advantage of available sunny patches without requiring extensive land modification.

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!

Citation Guide

Article Details for Citation

Tell Us About Your Work

We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.

Feeling generous?

Share this with your friends!

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.