Solar Energy Potential in Rizhao, Shandong, China

Rizhao, Shandong, China, located at 35.4141° N, 119.5291° E in the Northern Temperate Zone, offers generally favorable conditions for solar PV energy generation throughout the year, with some seasonal variations. The solar energy production in Rizhao follows a predictable pattern across seasons. Spring yields the highest daily output at 5.35 kWh per kW of installed capacity, closely followed by summer at 5.20 kWh/day. Production decreases significantly during autumn to 3.65 kWh/day and reaches its lowest point in winter at 3.18 kWh/day.

Seasonal Performance

Spring and summer clearly represent the peak production periods in Rizhao, Shandong, making up approximately 60% of the annual solar energy generation. The substantial drop in autumn and especially winter indicates that while solar remains viable year-round, supplementary energy sources might be beneficial during the colder months. For fixed solar panel installations in Rizhao, Shandong, the ideal tilt angle to maximize year-round energy production is 32 degrees facing South. This angle optimizes the capture of solar radiation throughout the year, balancing the seasonal variations in sun position.

Environmental Considerations

Several environmental factors could impact solar production in Rizhao:

• Air pollution and haze from nearby industrial activities can reduce solar irradiance reaching panels, potentially decreasing efficiency by 10-25% on heavily polluted days
• Coastal location brings concerns about salt corrosion, which can degrade panel performance and connections over time
• Seasonal monsoon rains and occasional typhoons may temporarily reduce production and pose physical risks to installations

To mitigate these challenges, several preventative measures are recommended. Installing panels with anti-reflective and hydrophobic coatings can help maintain efficiency despite pollution and precipitation. Using corrosion-resistant mounting hardware and properly sealed junction boxes will counter salt air effects. Additionally, robust mounting systems designed to withstand typhoon-force winds are essential for installations in this coastal region. Regular cleaning schedules are particularly important in this location to remove salt deposits and pollution residue that can accumulate on panel surfaces, ensuring optimal light absorption and electricity generation.

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 Rizhao

Seasonal solar PV output for Latitude: 35.4141, Longitude: 119.5291 (Rizhao, 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 32° South in Rizhao, China

To maximize your solar PV system's energy output in Rizhao, China (Lat/Long 35.4141, 119.5291) throughout the year, you should tilt your panels at an angle of 32° 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 Rizhao, 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 Rizhao, China. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 32° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
19° South in Summer	41° South in Autumn	50° South in Winter	28° 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 Rizhao, 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 Rizhao, 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 Rizhao, China

The topography surrounding Rizhao, China presents a diverse landscape characterized by coastal plains, rolling hills, and low mountains that gradually rise from the Yellow Sea coastline toward the interior. Rizhao itself sits on relatively flat coastal terrain at the eastern edge of the Shandong Peninsula, with an elevation near sea level. Moving inland from this coastal plain, the landscape transitions to gently undulating hills that rarely exceed 300 meters in height. To the west and northwest of Rizhao, the terrain becomes more varied with the foothills of the Shandong highlands. These areas feature a mix of agricultural valleys interspersed with hillier sections. The Wulian Mountains represent the most significant elevation change in the region, located approximately 30-40 kilometers inland from Rizhao city. While modest by Chinese standards, these mountains create a natural boundary between the coastal zone and the interior plateau.

Hydrological Features

The area is crossed by several river systems that have carved shallow valleys through the landscape. The Rizhao region benefits from these waterways which have, over millennia, deposited fertile alluvial soil across the lowlands. These river valleys typically feature flat, open terrain with gradual slopes, creating natural corridors through the otherwise hilly landscape. Along the immediate coastline, Rizhao features sandy beaches and small bays, with some areas of reclaimed land that have expanded the usable coastal plain. The interaction between land and sea has created a relatively straight coastline with few major indentations, though some natural harbors exist that have been developed for port facilities.

Optimal Areas for Solar PV Development

For large-scale solar photovoltaic development, several areas around Rizhao present favorable conditions based on topographical considerations. The most suitable locations would be: The inland plains and plateaus west of Rizhao city offer extensive flat terrain that would minimize grading costs for solar installations. These areas, located approximately 10-25 kilometers from the coast, provide sufficient elevation to avoid coastal fog while maintaining relatively flat profiles ideal for large solar arrays. The gently sloping hillsides facing south and southwest in the transitional zone between the coastal plain and the interior highlands present excellent opportunities. These areas receive consistent sunlight exposure throughout the day due to their orientation, while their slight incline can actually improve solar panel efficiency compared to perfectly flat installations. Agricultural plateaus in the northwestern districts, where the land rises to form broad, open spaces between hill systems, offer substantial contiguous areas suitable for development. These locations typically have good drainage and stable soil conditions, reducing infrastructure costs for large installations. Some of the less productive agricultural land in the low hill country could be repurposed for solar development. These areas often feature south-facing slopes with minimal shading from surrounding terrain features, creating natural solar collection zones. It's worth noting that coastal areas immediately adjacent to the Yellow Sea, while flat and accessible, may experience more cloud cover and sea haze than inland locations. The optimal distance from the coastline appears to be 15-30 kilometers inland, where the influence of coastal weather patterns diminishes while the terrain remains relatively accessible and undeveloped. The areas to avoid would include the steeper sections of the Wulian Mountains, where construction costs would be prohibitive, and the fertile river valleys that represent the region's most productive agricultural land. The ideal balance would be found in the transitional landscapes between these extremes, where moderate elevation changes provide good solar exposure without excessive construction challenges.

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.