Kyoto, Japan, situated at latitude 35.0203 and longitude 135.7602, offers a moderately favorable location for solar PV energy generation throughout the year. This ancient city, located in the Northern Temperate Zone, experiences distinct seasonal variations in solar energy production.

Seasonal Solar Performance

Solar panels in Kyoto demonstrate peak performance during the summer months, producing an impressive 5.16 kWh per day for each kilowatt of installed capacity. Spring follows closely behind with 5.00 kWh/day, making these seasons ideal for maximizing solar energy generation.

Autumn sees a noticeable decrease in output, with panels generating 3.69 kWh/day. Winter presents the most challenging period, with production dropping to 2.46 kWh/day per kW installed. This seasonal fluctuation highlights the importance of proper system sizing to ensure adequate year-round energy supply.

Optimal Panel Installation

To maximize year-round solar energy production in Kyoto, fixed solar panels should be tilted at a 31-degree angle facing south. This optimal angle takes into account the city's latitude and seasonal sun paths, ensuring the best possible exposure to sunlight throughout the year.

Environmental Considerations

While Kyoto's climate is generally conducive to solar energy production, there are some environmental factors to consider:

• Rainy season: Kyoto experiences a rainy season from June to July, which may temporarily reduce solar output.
• Occasional snowfall: Winter snowfall, though infrequent, can accumulate on panels and decrease efficiency.

To mitigate these issues, consider installing panels at a steeper angle to promote self-cleaning during rain and snow events. Additionally, implementing a regular cleaning schedule and using snow-shedding systems can help maintain optimal performance year-round.

In conclusion, while Kyoto's location presents some seasonal challenges, particularly in winter, it remains a viable option for solar PV energy generation. With proper planning and maintenance, solar installations in this historic city can provide a significant contribution to renewable energy production.

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

Link: Solar PV potential in Japan by location

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

Seasonal solar PV output for Latitude: 35.0203, Longitude: 135.7602 (Kyoto, Japan), 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 31° South in Kyoto, Japan

To maximize your solar PV system's energy output in Kyoto, Japan (Lat/Long 35.0203, 135.7602) throughout the year, you should tilt your panels at an angle of 31° 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 Kyoto, Japan

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 Kyoto, Japan. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 31° 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	40° South in Autumn	49° 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 Kyoto, Japan

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 Kyoto, Japan.

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 Kyoto, Japan

Kyoto, the ancient capital of Japan, is nestled in a valley surrounded by mountains on three sides. This unique topography has played a significant role in shaping the city's history and culture. The city itself is relatively flat, situated in the Yamashiro Basin, which provides a stark contrast to the surrounding mountainous terrain. To the east of Kyoto lies the Higashiyama mountain range, a series of low-lying hills that create a natural boundary between the city and the neighboring prefecture of Shiga. These mountains are home to many of Kyoto's famous temples and shrines, including Kiyomizu-dera and Ginkaku-ji. The northern part of the city is bordered by the Kitayama mountains, which extend westward and form part of the larger Tamba Highlands. These mountains are generally higher and more rugged than those to the east, offering scenic views and popular hiking trails. To the west, the Nishiyama mountains complete the natural enclosure of Kyoto. This range includes Mount Atago, the highest peak in the vicinity of Kyoto at 924 meters above sea level. The western mountains are less developed than their eastern counterparts, providing a more wild and natural backdrop to the city. The southern part of Kyoto opens up to the Kyoto Basin, which extends towards Osaka. This area is characterized by flatter terrain and is where much of the city's modern development has taken place.

Potential for Large-Scale Solar PV

When considering areas near Kyoto for large-scale solar photovoltaic (PV) installations, the topography presents both challenges and opportunities. The mountainous regions surrounding the city are generally not well-suited for such projects due to their steep slopes, forested areas, and cultural significance. However, the flatter areas to the south of Kyoto, extending towards Osaka, offer more promise for large-scale solar PV development. These areas have several advantages: 1. Flat terrain: The relatively level ground makes installation and maintenance easier and more cost-effective. 2. Fewer obstructions: With fewer tall buildings and natural obstacles, these areas receive more consistent sunlight throughout the day. 3. Proximity to urban centers: Being close to major cities like Kyoto and Osaka means easier grid integration and shorter transmission distances. 4. Available land: Some of these areas may include former agricultural or industrial sites that could be repurposed for solar energy production. It's important to note that while these southern regions show potential, any large-scale solar PV project would need to carefully consider environmental impacts, local regulations, and land-use policies. Additionally, Japan's commitment to preserving its cultural and natural heritage means that any such development would need to be balanced with these important considerations.

Japan solar PV Stats as a country

Japan ranks 3rd in the world for cumulative solar PV capacity, with 74,191 total MW's of solar PV installed. This means that 8.30% of Japan's total energy as a country comes from solar PV (that's 9th in the world). Each year Japan is generating 590 Watts from solar PV per capita (Japan ranks 4th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Japan?

Yes, there are several incentives for businesses wanting to install solar energy in Japan. These include the Feed-in Tariff (FIT) program, which provides a fixed price for electricity generated from renewable sources such as solar; subsidies and grants from local governments; tax credits; and loans with low interest rates. Additionally, businesses may be eligible for additional incentives depending on their location and type of installation.

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