Solar Energy Potential in Yeoju, South Korea

Yeoju, South Korea, located at 37.2994° North, 127.6363° East in the Northern Temperate Zone, offers varying potential for solar energy production throughout the year. This location experiences distinct seasonal changes that affect solar photovoltaic (PV) performance. The energy generation capacity fluctuates significantly across seasons. Summer stands out as the most productive period, with solar panels capable of generating approximately 5.34 kWh per day for each kilowatt of installed capacity. Spring follows closely behind with 5.13 kWh/day per kW. Production decreases considerably during autumn (3.57 kWh/day) and reaches its lowest point in winter (2.92 kWh/day).

Optimal Panel Installation

For fixed solar panel installations in Yeoju, the ideal tilt angle to maximize year-round energy production is 33 degrees facing South. This specific angle has been calculated taking into account the location's latitude, the Earth's elliptical orbit, and weighted solar potential throughout the year.

Seasonal Considerations

The substantial difference between summer/spring and winter production indicates that Yeoju is not an ideal location for consistent year-round solar generation. However, the location still offers good overall potential, particularly from late spring through early autumn when days are longer and solar intensity is higher.

Environmental Factors and Mitigation

Several environmental factors in Yeoju may impact solar energy production:

• Monsoon season (typically June to September) brings heavy rainfall and increased cloud cover, potentially reducing efficiency during what would otherwise be peak production months.
• Winter snow accumulation can temporarily cover panels, though this is mitigated by the steep recommended tilt angle.
• Yellow dust storms from China occasionally affect air quality in spring, which can reduce solar irradiance reaching panels.
• High humidity levels during summer may slightly reduce panel efficiency due to increased reflection of sunlight.

To maximize production despite these challenges, installations should incorporate regular cleaning systems to remove dust and snow accumulation. Elevated mounting systems can help minimize snow coverage in winter. Additionally, high-efficiency panels with good performance in diffuse light conditions would be beneficial for cloudy monsoon periods. While not perfect year-round, Yeoju still represents a viable location for solar PV installations with proper planning and mitigation strategies for seasonal variations.

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 124 locations across South Korea. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in South Korea by location

Solar output per kW of installed solar PV by season in Yeoju

Seasonal solar PV output for Latitude: 37.2994, Longitude: 127.6363 (Yeoju, South Korea), 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 Yeoju, South Korea

To maximize your solar PV system's energy output in Yeoju, South Korea (Lat/Long 37.2994, 127.6363) 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 Yeoju, South Korea

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 Yeoju, South Korea. 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 Yeoju, South Korea

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 Yeoju, South Korea.

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 Yeoju, South Korea

The topography surrounding Yeoju, South Korea, is characterized by a diverse landscape that combines gentle river valleys with rolling hills and modest mountains. Located in Gyeonggi Province, Yeoju sits along the banks of the Namhan River (South Han River), which meanders through the region creating fertile plains. The river valley forms a relatively flat terrain that gradually rises into undulating hills as one moves away from the water.

River Valley and Lowlands

The Namhan River is a dominant geographical feature of Yeoju, creating a broad valley with alluvial plains that have historically been used for agriculture, particularly rice cultivation. These lowland areas have elevations typically ranging from 20 to 50 meters above sea level and feature minimal slope, creating large expanses of flat terrain. The river itself winds through the landscape, occasionally widening into broader sections and creating small islands and sandbars during periods of low water.

Surrounding Hills and Mountains

As distance increases from the river, the landscape transitions to rolling hills that eventually rise into more pronounced elevations. These hills generally range from 100 to 300 meters in height, creating a gently undulating backdrop to the river valley. The terrain becomes more rugged and steep in certain sections, particularly to the east where the foothills of the Taebaek Mountain Range begin to assert themselves. Several small to medium-sized mountains dot the landscape around Yeoju, including Geumwolsan and Seojongsan. These features, while not particularly tall by global standards, create significant local relief and influence the area's drainage patterns, creating numerous small streams that feed into the Namhan River.

Solar PV Suitability

For large-scale solar photovoltaic installations, the most suitable areas near Yeoju would be the gently sloping hillsides that face south or southwest. These locations offer several advantages: The slightly elevated terrain of the hillsides reduces the risk of seasonal flooding that might affect installations placed in the lowest parts of the river valley. These hill areas typically have less agricultural value than the fertile river plains, making land conversion more economically and socially acceptable. The moderate slopes of these hillsides, particularly those with southern exposure, provide optimal angles for solar collection without requiring extensive grading or modification of the land. Areas with slopes between 5-15 degrees facing south would be particularly advantageous. Some of the broader plateaus and gentler slopes of the hills surrounding Yeoju offer sufficient contiguous space for large installations while minimizing shading from adjacent higher terrain. The areas to the south and southwest of Yeoju proper, where the terrain rises gradually from the river valley, present particularly promising locations. The agricultural plains, while flat and accessible, may represent a trade-off between energy production and food security, as these areas constitute some of the most productive agricultural land in the region. However, certain sections of the plains that are less productive or affected by industrial development might also be considered for solar development. Areas to generally avoid would include the steeper mountain slopes to the east, where installation would be technically challenging and potentially disruptive to natural drainage patterns and forest ecosystems. The immediate floodplain of the Namhan River should also be avoided due to flood risks and the greater ecological sensitivity of riparian zones.

South Korea solar PV Stats as a country

South Korea ranks 8th in the world for cumulative solar PV capacity, with 18,161 total MW's of solar PV installed. This means that 3.80% of South Korea's total energy as a country comes from solar PV (that's 21st in the world). Each year South Korea is generating 350 Watts from solar PV per capita (South Korea ranks 9th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in South Korea?

Yes, there are incentives for businesses wanting to install solar energy in South Korea. The Korean government offers a variety of financial incentives and subsidies for businesses that install solar energy systems. These include tax credits, grants, loans, and other forms of support. Additionally, the government has implemented a feed-in tariff system which guarantees a fixed price for electricity generated from renewable sources such as solar power. This helps to make the installation of solar energy systems more attractive to businesses by providing them with a guaranteed return on their investment.

Do you have more up to date information than this on incentives towards solar PV projects in South Korea? 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

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