Fixed tilt
No angle changes
- Annual output / 1 kW
- 1,267 kWh
- Extra vs fixed
- Baseline
Size.Solar
Best solar panel angle in Tokyo
Start with 34° facing South for a fixed setup. Compare seasonal options, then confirm the result against your roof, shade, and local weather.
Turn this angle into a roof plan
Start with 34° South in Tokyo, then verify the usable roof area and request installer options.
1. Best fixed tilt & direction
34°
34° facing South. Set it once for the entire year.
Planning basis: latitude and estimated annual solar production.
2. Two adjustments / year
Winter: 41° South
Summer: 28° South
Provides a 1.7% gain over the best fixed tilt.
Planning basis: summer and winter production estimates.
3. Four adjustments / year
Summer20° South
Autumn35° South
Winter51° South
Spring35° South
Offers a 4.7% gain over the best fixed tilt.
Planning basis: four seasonal production estimates.
4. Twelve adjustments / year
Jan51° South
Feb51° South
Mar42° South
Apr36° South
May29° South
Jun20° South
Jul20° South
Aug20° South
Sep29° South
Oct36° South
Nov42° South
Dec51° South
Achieves the maximum 4.7% gain over the best fixed tilt.
Planning basis: twelve monthly production estimates.
*Tilt angles are measured from horizontal. Each non-flat result includes the compass direction the panel faces. Gains are estimates based on modeling.
Quick estimate — not a final quote
Good for a quick comparison. For a quote, check your roof, shade, and local weather in a project.
Quote-ready tilt decision
Give installers one fixed-angle target first
Start the quote conversation with 34° South. Seasonal adjustment is only worth pricing if a supplier can show that roughly 4.7% extra production beats the cost, access risk, and warranty complexity of adjustable frames.
Base quote
34° South
Best default for normal roof-mounted systems and the first number to send to installers.
Adjustable option
Winter: 41° South
Summer: 28° South
Four seasonal changes model about 4.7% gain. Monthly adjustment models about 4.7%.
Installer checks
Roof pitch, available rail angles, wind loading, waterproofing, access for cleaning, and whether adjustment affects warranty.
Direction check
In Tokyo, the practical target is a south-facing array. Shade-free roof space, inverter sizing, and battery goals usually matter more than small angle differences.
Adjustment payoff · 1 kW reference array
Is changing the panel angle worth it in Tokyo?
Start with the fixed angle. Four seasonal changes model +60 kWh a year (+4.7%) for each 1 kW of panels. Changing the angle every month adds no modeled annual output beyond the seasonal strategy.
These are latitude-based planning estimates, not a supplier quote. The comparison isolates panel angle; adjustable framing, labour, safe roof access, shade, soiling, and warranty terms can change the practical decision.
Twice yearly
2 changes/year
- Annual output / 1 kW
- 1,288 kWh
- Extra vs fixed
- +21 kWh (+1.7%)
Seasonal
4 changes/year
- Annual output / 1 kW
- 1,327 kWh
- Extra vs fixed
- +60 kWh (+4.7%)
Monthly
12 changes/year
- Annual output / 1 kW
- 1,327 kWh
- Extra vs fixed
- +60 kWh (+4.7%)
View the 12-month output values
Estimated monthly production in kWh for each 1 kW of panels.
| Month | Fixed tilt | Seasonal | Monthly |
|---|---|---|---|
| Jan | 73 kWh | 80 kWh | 80 kWh |
| Feb | 81 kWh | 89 kWh | 89 kWh |
| Mar | 101 kWh | 101 kWh | 101 kWh |
| Apr | 117 kWh | 117 kWh | 117 kWh |
| May | 125 kWh | 125 kWh | 125 kWh |
| Jun | 128 kWh | 141 kWh | 141 kWh |
| Jul | 130 kWh | 143 kWh | 143 kWh |
| Aug | 123 kWh | 135 kWh | 135 kWh |
| Sep | 117 kWh | 117 kWh | 117 kWh |
| Oct | 108 kWh | 108 kWh | 108 kWh |
| Nov | 87 kWh | 87 kWh | 87 kWh |
| Dec | 77 kWh | 84 kWh | 84 kWh |
Compare solar panel angles near Tokyo
See how the recommended fixed angle changes across nearby cities and latitudes.
- Solar panel angle in SeoulSouth Korea · Latitude 37.5°
- Solar panel angle in BeijingChina · Latitude 39.9°
- Solar panel angle in TaipeiTaiwan · Latitude 25.0°
- Solar panel angle in Hong KongHong Kong · Latitude 22.3°