Solar Panel Angle Guide
Solar Panel Angle in Tokyo
locationPage.latitudeLineHere's the optimal solar panel tilt and orientation for maximum energy production.
Year-Round Tilt
34.1°
Summer Tilt
20.7°
Winter Tilt
50.7°
Face
South
180° azimuth
Monthly Optimal Tilts for Tokyo
Jan
56.0°
Feb
47.4°
Mar
35.7°
Apr
24.0°
May
15.4°
Jun
12.2°
Jul
15.4°
Aug
24.0°
Sep
35.7°
Oct
47.4°
Nov
56.0°
Dec
59.1°
Peak Sun Hours
4.5 hrs/day
Average daily solar insolation
Annual Production (400W panel)
~657 kWh
At 34.1° tilt, facing South
Solar Panel Recommendations for Tokyo
- Fixed mount: Set your panels at 34.1° tilt, facing South (180° azimuth).
- Seasonal adjustment: Tilt to 20.7° in summer and 50.7° in winter for up to 15% more annual energy.
- Monthly adjustment: Adjust tilt each month using the table above for maximum year-round production.
Solar Energy in Japan's Capital
Tokyo receives approximately 4 peak sun hours daily with a humid subtropical climate featuring hot, humid summers and relatively mild winters. Japan's solar market has grown substantially since the Fukushima nuclear accident, driven by generous feed-in tariffs.
Japan's Feed-in Tariff (FIT) program has historically driven substantial solar adoption, though tariff rates have declined over time. Tokyo Electric Power Company (TEPCO) offers net metering for residential solar customers. Japan's high electricity rates strongly support solar economics.
Tokyo's dense urban environment means many homes have limited roof area, and shading from neighboring buildings is a common issue. Typhoon wind loads and seismic considerations require reinforced mounting systems. Despite these challenges, Tokyo's solar market continues to grow, supported by strong policy incentives.
Orientation Performance
Panel orientation significantly affects energy production. The table below shows relative output compared to true south-facing panels:
| Orientation | Relative Output |
|---|---|
| South | 100% |
| Southeast | 96% |
| Southwest | 96% |
| East | 85-90% |
| West | 85-90% |
| North | 60-75% |
Frequently Asked Questions
Is solar viable in Tokyo?
Tokyo averages 4 peak sun hours. Japan's FIT program and TEPCO net metering support solar adoption despite dense urban conditions.
How much energy can a 400W panel generate here?
With 4.5 peak sun hours per day, a properly aligned 400W panel could generate approximately 657 kWh per year.
Related Calculators
Solar Panel Tilt Calculator
Calculate optimal tilt for any latitude and month
Solar Panel Azimuth Calculator
Find the exact compass heading for your panels
Get precision alignment with SolarAlign Pro
Use your phone's sensors to align your panels to the exact angle calculated here.Learn more →