Datong, Shanxi, China, situated at latitude 40.0947 and longitude 113.2842, presents a varied landscape for solar energy production throughout the year. This location in the Northern Temperate Zone experiences significant seasonal fluctuations in solar output, which directly impacts the efficiency of photovoltaic (PV) systems.

Seasonal Solar Performance

The solar energy potential in Datong varies considerably across seasons. Summer stands out as the most productive period, with an impressive 6.40 kWh per day for each kilowatt of installed solar capacity. Spring follows closely, yielding 5.96 kWh/day. Autumn sees a noticeable decline to 3.99 kWh/day, while winter experiences the lowest output at 3.25 kWh/day.

These figures indicate that Datong's solar potential is strongest from late spring through early autumn. During these months, longer daylight hours and higher sun angles contribute to increased energy production. However, the substantial drop in winter output suggests that supplementary energy sources may be necessary during the colder months.

Optimal Panel Positioning

For fixed solar panel installations in Datong, Shanxi, the ideal tilt angle to maximize year-round energy production is 36 degrees facing south. This angle is calculated to optimize exposure to the sun's rays throughout the year, considering the location's latitude and seasonal variations in the sun's path.

Environmental Considerations

Datong faces some environmental challenges that could affect solar energy production. The city is known for its coal mining industry, which can contribute to air pollution and particulate matter in the atmosphere. These factors may reduce solar irradiance reaching the panels, potentially decreasing their efficiency.

To mitigate these issues, several preventative measures can be implemented:

• Regular panel cleaning to remove dust and pollutants
• Use of anti-soiling coatings on panel surfaces
• Installation of air quality monitoring systems to track and respond to pollution levels

Additionally, Datong experiences cold winters with occasional snowfall. Snow accumulation on panels can significantly reduce their output. Installing panels at a steeper angle during winter or implementing automated snow removal systems can help maintain production during these months.

Despite these challenges, with proper planning and maintenance, Datong's location can still be suitable for solar energy production, particularly during the spring and summer months when output is at its peak.

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 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 Datong

Seasonal solar PV output for Latitude: 40.0947, Longitude: 113.2842 (Datong, 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 36° South in Datong, China

To maximize your solar PV system's energy output in Datong, China (Lat/Long 40.0947, 113.2842) throughout the year, you should tilt your panels at an angle of 36° 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 Datong, 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 Datong, China. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 36° 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	55° South in Winter	32° 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 Datong, 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 Datong, 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 Datong, China

The landscape surrounding Datong, China, located at approximately 40.0947°N, 113.2842°E, is characterized by a diverse and rugged topography. This region, situated in the northern part of Shanxi Province, features a mix of mountainous terrain, plateaus, and valleys. To the north and west of Datong, the land rises into the Datong Basin, which is part of the larger Loess Plateau. This area is marked by rolling hills and deep gullies carved by centuries of wind and water erosion. The soil here is primarily composed of loess, a fine, yellowish-brown silt deposited by wind over thousands of years. South of the city, the terrain becomes more mountainous, with the Hengshan Mountain range dominating the landscape. These mountains, part of the larger Taihang Mountain system, feature steep slopes and rocky outcrops, with elevations reaching over 2,000 meters above sea level in some areas.

Potential Areas for Large-Scale Solar PV

When considering suitable locations for large-scale solar photovoltaic (PV) installations near Datong, several factors come into play. The ideal areas would have relatively flat terrain, good sun exposure, and minimal shading from surrounding features. The Datong Basin, particularly the areas to the north and northeast of the city, presents promising opportunities for solar PV development. These regions offer expansive, gently sloping terrain with fewer obstacles to block sunlight. The loess soil in this area, while not ideal for agriculture, can provide a stable foundation for solar panel installations. Some of the plateau areas to the west of Datong could also be suitable for solar farms. These elevated regions often receive ample sunlight throughout the day and have less vegetation to interfere with panel placement. It's important to note that while the mountainous areas to the south offer some flat valleys that could potentially host solar installations, the surrounding peaks may cast shadows and reduce overall sunlight exposure, making them less ideal for large-scale projects. Any solar development in the region would need to carefully consider local environmental factors, including potential dust from the loess soil, which could affect panel efficiency. Additionally, proper environmental impact assessments would be necessary to ensure that solar farms do not negatively affect the unique ecosystem of the Loess Plateau.

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.