Dezhou, Shandong, China, located at 37.4466°N, 116.3671°E in the Northern Temperate Zone, presents a varying landscape for solar PV energy generation throughout the year. The city experiences significant seasonal fluctuations in solar energy production capability.

Solar panels in Dezhou perform exceptionally well during spring, producing about 5.57 kWh per day for each kilowatt of installed capacity. Summer follows closely with 5.49 kWh/day per kW installed. These warmer months represent the prime solar harvesting period in this region.

Production decreases considerably during the cooler months, with autumn yielding 3.36 kWh/day and winter dropping further to 2.99 kWh/day per kW of installed capacity. This seasonal pattern creates a production curve that peaks in spring and summer while forming a trough during autumn and winter.

Optimal Panel Installation

For fixed solar panel installations in Dezhou, Shandong, the ideal tilt angle to maximize year-round energy production is 33 degrees facing South. This specific angle has been calculated to optimize solar capture across all seasons, accounting for the Earth's elliptical orbit and the location's position in the Northern Hemisphere.

Environmental Challenges

Several environmental factors may impact solar production in Dezhou. The region experiences occasional dust storms from the northern deserts, which can significantly reduce panel efficiency by creating a layer of particulate matter on panel surfaces. Installing automated cleaning systems or scheduling regular manual cleaning can mitigate this issue.

Dezhou also faces seasonal air pollution, particularly during winter when coal heating increases. This pollution can reduce solar irradiance reaching panels by up to 20% on severely polluted days. While individual installations cannot control regional air quality, selecting panels with anti-reflective coatings can help maximize energy capture even in hazy conditions.

Summer in Dezhou brings high temperatures that can reduce panel efficiency, as most photovoltaic cells lose efficiency above 25°C. Installing panels with adequate airflow beneath them and choosing temperature-resistant models can help maintain production during hot periods. Additionally, occasional summer hailstorms may pose a physical threat to panels, making impact-resistant models a wise investment for this location.

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 Dezhou

Seasonal solar PV output for Latitude: 37.4466, Longitude: 116.3671 (Dezhou, 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 33° South in Dezhou, China

To maximize your solar PV system's energy output in Dezhou, China (Lat/Long 37.4466, 116.3671) throughout the year, you should tilt your panels at an angle of 33° 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 Dezhou, 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 Dezhou, China. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 33° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
21° South in Summer	42° South in Autumn	52° South in Winter	30° 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 Dezhou, 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 Dezhou, 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 Dezhou, China

The landscape surrounding Dezhou, located in the northwestern part of Shandong Province in eastern China, is characterized primarily by flat plains typical of the North China Plain region. This expansive flatland features minimal elevation changes across much of the area, with the terrain generally sitting between 20-50 meters above sea level. The topography has been shaped by centuries of sedimentation from the Yellow River system, resulting in fertile alluvial soils that have historically supported extensive agriculture. To the north and northeast of Dezhou, the terrain remains predominantly level, extending toward the Bohai Sea. Moving south and southwest, the landscape maintains its flatness for considerable distances before eventually rising toward the central Shandong mountain ranges, though these highlands lie well outside Dezhou's immediate vicinity. The western portions similarly consist of flat to gently rolling terrain that merges with the broader North China Plain.

Hydrological Features

The area's topography is influenced by several waterways, most notably the Grand Canal which passes through the region. This ancient artificial waterway, along with various tributaries and smaller rivers, has contributed to the development of the local landscape. Some shallow depressions and minor undulations in the terrain often correspond to current or historical watercourses. Despite these water features, the overall character remains decidedly flat with minimal natural barriers or significant elevation changes.

Solar PV Suitability

The flat, open terrain surrounding Dezhou presents excellent opportunities for large-scale solar photovoltaic installations. The most suitable areas for solar development would be the extensive agricultural plains to the west and southwest of the city. These regions combine several advantageous factors: minimal shading concerns due to the absence of mountains or tall natural features, good existing road infrastructure for construction and maintenance access, and relatively lower population density compared to areas immediately adjacent to the urban center. The northwestern sectors beyond Dezhou's immediate urban boundaries also offer promising locations for solar farms. These areas benefit from the consistently flat topography while maintaining proximity to existing electrical infrastructure and transportation networks. The natural landscape requires minimal grading or preparation for solar installations, reducing development costs and environmental impact. Areas to potentially avoid include the immediate floodplains of rivers and canals, where seasonal water level changes might present challenges. Similarly, the most productive agricultural lands might face competing interests between food production and energy generation, though dual-use approaches combining agriculture with elevated solar installations represent a potential compromise in these zones. The eastern approaches to Dezhou, while topographically suitable, feature higher population density and more intensive land use, potentially complicating large-scale solar development. The minimal elevation changes throughout the region mean that aspect (the direction a slope faces) is not a significant consideration in site selection, unlike in more mountainous regions where south-facing slopes would be strongly preferred.

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.