Solar PV Analysis of Nagoya, Japan
Nagoya, Japan (latitude 35.1814506, longitude 136.9065571) is a suitable location for generating solar power due to its position within the Northern Temperate Zone, which receives ample sunlight on average throughout the year. Although the city may encounter some challenging weather conditions for solar power generation, such as cloudy days or heavy snowfall during winter months, Nagoya's overall potential for solar energy production remains promising.
During summer months, Nagoya typically experiences longer daylight hours and higher temperatures compared to other seasons. This results in an average of 5.24 kWh per day per kW of installed solar capacity generated in this season. In autumn, there is a decrease in available sunlight and temperature, leading to an average daily generation of 3.79 kWh per kW of installed solar capacity. Winter sees even less daylight and colder temperatures, resulting in an average daily generation of 2.55 kWh per kW of installed solar capacity.
As spring arrives with increasing amounts of daylight and warmer temperatures, the average daily generation rises to 4.98 kWh per kW of installed solar capacity during this season.
To optimize efficiency and output from your solar system in Nagoya (latitude 35.1814506, longitude 136.9065571), it is recommended that panels be tilted at a fixed angle of 31 degrees facing south for ideal performance across all seasons and weather conditions experienced at this location throughout the year.
While local factors such as environmental conditions or topography might affect energy production at specific sites within Nagoya, these can be mitigated through careful site selection and appropriate installation techniques tailored to individual circumstances when installing a solar system in order to ensure greater energy production relative to these factors if necessary.
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 Nagoya
Seasonal solar PV output for Latitude: 35.1814506, Longitude: 136.9065571 (Nagoya, 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 Nagoya, Japan
To maximize your solar PV system's energy output in Nagoya, Japan (Lat/Long 35.1814506, 136.9065571) 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 Nagoya, 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 Nagoya, 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 | 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 Nagoya, 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 Nagoya, Japan.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - 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 Nagoya, Japan
The topography around Nagoya, Japan is mostly flat plains with some rolling hills. The nearby areas that would be most suitable for large-scale solar PV are the flat plains and open fields. These areas have plenty of space and direct access to sunlight, making them ideal locations for solar power generation. Additionally, these areas are relatively close to urban centers, meaning they can be easily connected to the electricity grid.
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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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Friday 17th of March 2023
Last Updated: Monday 21st of July 2025
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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.
