Solar PV Analysis of Sannomaru, Japan
In Sannomaru, Aichi, Japan, situated at a latitude of 35.179 and a longitude of 136.8939, the solar energy yield per kilowatt (kW) of installed solar capacity fluctuates according to the season. This region falls under the Northern Temperate Zone, which experiences distinct seasonal variations in sunlight intensity and duration.
During summer months, with longer daylight hours and higher temperatures, Sannomaru sees an average daily generation of 5.24 kilowatt-hours (kWh) per kW of installed solar power. As autumn progresses with shorter days and cooler temperatures, this figure decreases to an average daily production of 3.79 kWh/kW.
Winter further reduces the available sunlight due to its shorter days and lower sun angle; thus generating an average daily output as low as 2.55 kWh/kW in Sannomaru during this season. However, springtime brings about a resurgence in solar power generation with increased daylight hours leading to an average daily yield amounting to approximately 4.98 kWh/kW.
Given these seasonal fluctuations in sunlight availability at this location, for fixed panel installations it is recommended that panels be tilted at an angle of approximately 31 degrees facing south for optimal year-round energy capture.
However, it's important to note that local weather conditions such as heavy rain or snowfall can significantly impact the efficiency of solar power generation by obstructing sunlight reaching the panels; particularly during autumn and winter seasons when such weather events are more frequent in this region.
To mitigate these potential impediments on solar production efficiency at this location: consider installing adjustable tilt mechanisms for better alignment towards sun during different seasons; ensure regular cleaning & maintenance especially after heavy rain or snowfall events; install adequate drainage system around installation site against water logging from excessive rainfall; also consider integrating battery storage systems for storing excess generated electricity during high-yield periods (like summer) for use during low-yield periods (like winter).
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 Sannomaru
Seasonal solar PV output for Latitude: 35.179, Longitude: 136.8939 (Sannomaru, 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 Sannomaru, Japan
To maximize your solar PV system's energy output in Sannomaru, Japan (Lat/Long 35.179, 136.8939) 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 Sannomaru, 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 Sannomaru, 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 Sannomaru, 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 Sannomaru, 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 Sannomaru, Japan
The topography around Sannomaru, Japan is mostly flat with some low hills and mountains in the distance. The nearby areas that would be most suitable for large-scale solar PV are open fields with direct access to sunlight and minimal shade. These could include agricultural land, industrial sites or other flat surfaces such as rooftops. Additionally, any area close to a grid connection would be ideal for large-scale solar PV installation.
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: Wednesday 2nd of August 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.
