Bijie, Guizhou, China, located in the Northern Sub Tropics at coordinates 27.3114, 105.2928, offers a moderately favorable location for solar PV energy generation, though with significant seasonal variations. This location experiences distinct differences in solar electricity production throughout the year, which impacts the overall efficiency of solar installations.

Seasonal Solar Production

Solar energy generation at Bijie varies considerably across the four seasons. Summer stands out as the most productive period, generating an average of 5.08 kWh per day for each kilowatt of installed solar capacity. Spring follows as the second most productive season with 3.79 kWh/day, while autumn produces 3.37 kWh/day. Winter shows the lowest production at just 2.07 kWh/day, less than half of summer's output.

The peak solar generation period runs from April through September, with the highest production occurring in June and July. This makes summer an ideal time for solar energy harvesting in Bijie, Guizhou, while winter months (December through February) represent a significant drop in production capability.

Optimal Installation Configuration

For fixed solar panel installations in Bijie, Guizhou, the ideal tilt angle to maximize year-round energy production is 23 degrees facing South. This specific angle optimizes the capture of solar radiation throughout the year, accounting for Bijie's latitude and seasonal sun positions.

Environmental and Weather Challenges

Several significant factors can impede solar production in Bijie:

• High humidity and frequent cloud cover during the monsoon season (May-October) can reduce solar efficiency
• Air pollution from nearby industrial activities and winter coal burning can diminish solar radiation reaching panels
• Occasional hailstorms in spring and summer pose physical risks to panel integrity
• Dust accumulation from the region's agricultural activities and seasonal winds

Preventative Measures

To maximize solar production despite these challenges, several preventative measures can be implemented:

• Install hail-resistant panels with tempered glass and reinforced frames
• Implement automated cleaning systems or regular maintenance schedules to address dust buildup
• Use anti-soiling coatings on panels to reduce dust adhesion and improve self-cleaning during rainfall
• Consider slight adjustments to the tilt angle (±5°) based on whether winter or summer production is prioritized
• Incorporate microinverters or power optimizers to minimize production losses from partial shading

While Bijie is not an ideal location for solar production year-round due to its pronounced seasonal variations, proper system design and maintenance can still make solar PV installations economically viable, particularly when designed to maximize production during the more favorable spring and 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 Bijie

Seasonal solar PV output for Latitude: 27.3114, Longitude: 105.2928 (Bijie, 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 Bijie, China

To maximize your solar PV system's energy output in Bijie, China (Lat/Long 27.3114, 105.2928) 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 Bijie, 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 Bijie, 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
12° South in Summer	31° South in Autumn	42° South in Winter	20° 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 Bijie, 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 Bijie, 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 Bijie, China

The topography surrounding Bijie, China is characterized by a diverse landscape featuring dramatic karst formations, rolling hills, and mountainous terrain that defines much of southwestern China's Guizhou Province. Bijie sits at an elevation of approximately 1,500 meters above sea level, placing it within China's Yunnan-Guizhou Plateau region. This elevated position contributes to its distinct climate and topographical features. The landscape around Bijie is predominantly mountainous, with numerous peaks and valleys creating a complex terrain pattern. The karst topography, formed by the dissolution of soluble rocks such as limestone, dolomite, and gypsum, has produced distinctive features including sinkholes, caves, and underground streams. These geological formations create a visually striking landscape but also present challenges for large-scale development projects.

Surrounding Mountain Ranges

To the north and west of Bijie lie the eastern extensions of the Wumeng Mountains, which form part of the larger Yunnan-Guizhou Plateau system. These mountains generally range from 1,800 to 2,400 meters in elevation, creating significant variations in altitude throughout the region. The southern and eastern portions of the Bijie area transition toward the central Guizhou highlands, maintaining a rugged topographical character but with generally lower elevations.

Valley Systems

Interspersed among the mountainous terrain are river valleys that have carved through the landscape over millions of years. These valleys often feature terraced agricultural land where local communities have adapted to the challenging topography. The Wu River and its tributaries form important drainage systems in the region, creating natural corridors through the otherwise challenging terrain.

Potential Areas for Solar Development

When considering areas near Bijie suitable for large-scale solar photovoltaic development, several factors must be evaluated including terrain flatness, elevation, aspect (direction the land faces), and accessibility. Based on topographical considerations alone, the following areas present potential opportunities: The broader valley floors to the southwest of Bijie offer relatively flat terrain compared to the surrounding mountains. These areas, particularly in parts of Qixingguan District, provide sufficient space for larger solar installations while maintaining reasonable accessibility via existing transportation networks. Some of the gently sloping highland plateaus to the southeast of Bijie city proper also present viable options. These elevated flat areas benefit from reduced fog compared to lower valleys and often have south-facing aspects that maximize solar exposure throughout the year. The townships of Qianxi and Jinsha counties contain several such plateau regions that merit consideration.

Topographical Challenges

Despite these potential areas, the region's topography presents several challenges for large-scale solar development. The prevalence of steep slopes throughout much of the surrounding territory limits the amount of contiguous flat land available for extensive installations. Additionally, the karst geology can create unstable foundation conditions that require careful site assessment and engineering solutions. The mountainous nature of the landscape also creates significant shading effects, particularly in the narrow valleys where surrounding peaks can block direct sunlight during portions of the day. This is especially pronounced in the deeper valleys to the north and west of Bijie city. Furthermore, the region experiences seasonal fog and cloud cover due to its elevation and topographical influences on local weather patterns. This meteorological reality affects solar potential and must be factored into site selection processes.

Conclusion

While the topography around Bijie presents certain challenges for solar PV development, the region does contain viable areas for such projects, particularly in the southwest valley systems and southeastern plateau regions. These areas offer the best compromise between suitable terrain, solar exposure, and accessibility within this mountainous landscape. Any large-scale development would require detailed site-specific assessments to address the unique topographical and geological conditions that characterize this fascinating region of southwestern China.

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.

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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.