Solar PV Analysis of Yoshihara, Japan
Yoshihara, Okinawa, Japan is located in the Northern Sub Tropics and it has a decent potential for generating solar energy throughout the year. The amount of electricity that can be produced from each kilowatt of installed solar panels varies by season. In summer, you can expect to get about 5.86 kWh per day for each kW of installed solar power, in autumn it's about 4.76 kWh per day, in winter it drops to around 3.35 kWh per day and then rises again to approximately 5.03 kWh per day during spring.
This means that the best time to produce solar energy at this location would be during the summer and spring months when sunlight hours are longer and more intense compared with other seasons.
If you're installing fixed panel installations at this location, tilting them at an angle of 23 degrees facing south will maximize their exposure to sunlight throughout the year thus increasing total production.
However, there could be some factors that might hinder optimal production of solar energy here such as seasonal weather changes like heavy rainfall or snowfall which may cover up your panels reducing their efficiency or even damaging them altogether if not well protected.
To prevent these issues from affecting your system's performance, consider regular maintenance checks especially during harsh weather conditions; removing any obstructions like snow or fallen leaves on your panels regularly; installing protective measures such as durable frames for your panels against heavy winds; and finally ensuring they are properly angled towards maximum sun exposure all year round can help ensure greater energy production.
Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° 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 Yoshihara
Seasonal solar PV output for Latitude: 26.3372, Longitude: 127.7816 (Yoshihara, 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 23° South in Yoshihara, Japan
To maximize your solar PV system's energy output in Yoshihara, Japan (Lat/Long 26.3372, 127.7816) throughout the year, you should tilt your panels at an angle of 23° 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 Yoshihara, 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 Yoshihara, Japan. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 23° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 11° South in Summer | 31° South in Autumn | 41° South in Winter | 20° 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 Yoshihara, 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 Yoshihara, 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 Yoshihara, Japan
Yoshihara is located in the southern part of Okinawa Island, Japan. The topography around Yoshihara is a mix of flat land and low hills. The area experiences a subtropical climate with abundant sunshine throughout the year.
As for large-scale solar PV installations, flat lands would be most suitable due to ease of installation and maintenance. Areas with less vegetation and building structures would also be preferable to minimize shading on the panels. Given these criteria, agricultural fields or unused lands near Yoshihara could potentially be good locations for solar PV projects.
However, it's important to note that any decision on where to install large-scale solar PV should also consider factors such as local regulations, proximity to power grids for easy connection and transmission of electricity generated, as well as potential environmental impacts.
It's recommended that detailed site assessments are conducted by professionals before making any decisions on specific locations for large-scale solar PV installations.
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!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Wednesday 22nd of May 2024
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.
