The location in Haidian, China, situated at latitude 39.9881 and longitude 116.2846, presents a mixed picture for solar energy generation throughout the year. This northern temperate zone area experiences significant seasonal variations in solar output, which impacts the overall efficiency of photovoltaic (PV) systems.

Seasonal Solar Performance

Solar energy production at this location peaks during the spring and summer months. In spring, the average daily output reaches an impressive 5.42 kWh per kW of installed solar capacity, slightly surpassing the summer average of 5.35 kWh/day. These seasons offer the most favorable conditions for solar energy generation, with longer daylight hours and generally clearer skies.

However, the autumn and winter months see a significant drop in solar output. Autumn produces an average of 3.24 kWh/day, while winter performance dips to 2.96 kWh/day. This substantial decrease is due to shorter days, lower sun angles, and potentially more overcast conditions during these seasons.

Optimal Panel Installation

To maximize year-round solar energy production at this location, fixed solar panels should be installed at a tilt angle of 36 degrees facing south. This angle is calculated to capture the most sunlight throughout the year, considering the Earth's elliptical orbit and the location's specific latitude.

Environmental and Weather Factors

Several factors could potentially impact solar production in Haidian:

1. Air pollution: Being close to Beijing, the area may experience high levels of air pollution, which can reduce solar irradiance reaching the panels.
2. Winter snow: Snowfall during winter months could temporarily cover panels, reducing efficiency.
3. Dust storms: The region occasionally experiences dust storms, which can coat panels and decrease their effectiveness.

Preventative Measures

To mitigate these issues, consider implementing the following measures:

• Regular cleaning: Establish a routine cleaning schedule to remove dust, pollutants, and snow from panels.
• Anti-soiling coatings: Apply specialized coatings to panels to reduce dust and pollutant adherence.
• Tilt adjustment: Consider adjustable mounting systems to optimize panel angles seasonally, especially to shed snow in winter.
• Air quality monitoring: Install air quality sensors to track pollution levels and adjust cleaning frequency accordingly.

While not ideal year-round, with proper installation and maintenance, solar PV systems in Haidian can still provide significant energy output, particularly during the spring and summer months.

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 Haidian

Seasonal solar PV output for Latitude: 39.9881, Longitude: 116.2846 (Haidian, 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 Haidian, China

To maximize your solar PV system's energy output in Haidian, China (Lat/Long 39.9881, 116.2846) 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 Haidian, 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 Haidian, 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 Haidian, 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 Haidian, 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 Haidian, China

The topography around Haidian, China, located at latitude 39.9881 and longitude 116.2846, is characterized by a diverse landscape that combines urban areas with natural features. Haidian is situated in the northwestern part of Beijing, nestled between the bustling city center and the picturesque Western Hills. The terrain in and around Haidian is generally flat to gently rolling, with elevations gradually increasing as one moves towards the west. The eastern portion of Haidian, which is closer to central Beijing, is predominantly flat and heavily urbanized. This area is densely populated and filled with buildings, roads, and other urban infrastructure. As you move westward, the landscape becomes more varied. The Western Hills, also known as Xishan, form a natural boundary on the western edge of Haidian. These hills are not particularly high, with elevations ranging from about 100 to 400 meters above sea level. They provide a scenic backdrop to the district and offer some relief from the urban sprawl.

Potential Areas for Large-Scale Solar PV

When considering areas nearby that would be most suited for large-scale solar photovoltaic (PV) installations, several factors come into play. The ideal location would have ample open space, relatively flat terrain, and good sun exposure. The areas to the north and northwest of Haidian, extending into the neighboring Changping District, offer promising potential for solar PV development. These regions feature more open land and less urban density compared to Haidian proper. The terrain here is generally flat to gently undulating, which is favorable for the installation of solar panels. Another area with potential is the region to the southwest of Haidian, in parts of Mentougou District. While this area is more hilly, there are pockets of flatter land that could be suitable for solar farms. However, care would need to be taken to avoid areas with significant shading from the surrounding hills. It's important to note that while these areas may be topographically suitable, other factors such as land use regulations, environmental considerations, and proximity to power infrastructure would also need to be taken into account when planning large-scale solar PV installations. Additionally, any development would need to be balanced with the region's agricultural needs and ecological preservation efforts.

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.