PVGIS · SolarMapped
Solar potential in Tokyo
This estimate represents one coordinate near the city center, not every roof or neighborhood.
Explore on the solar map ↗Annual values
PV output is estimated electricity from 1 kWp of installed solar panels. Irradiation is sunlight energy received per square meter on the optimally tilted panel plane; it is not electricity.
For a 5 kWp system, multiply the electricity values by five. This simple scaling does not account for roof-specific shading or equipment constraints.
Compared with the sampled-city benchmark: -2.4% (1,316kWh/kWp/year). These figures are the unweighted mean of the city locations listed below, not a national average. Two urban points do not represent an entire country, its roofs or its solar installations.
Monthly solar irradiation and PV output
Highest-output month: March · 122.3kWh/kWp/month. Lowest-output month: October · 92.6kWh/kWp/month.
| Month | Estimated PV output (kWh/kWp/month) | Solar irradiation (kWh/m²/month) |
|---|---|---|
| January | 118.7 | 140.7 |
| February | 109.1 | 130.4 |
| March | 122.3 | 150.1 |
| April | 119.3 | 149.6 |
| May | 117.8 | 151.4 |
| June | 94.5 | 124.3 |
| July | 100.9 | 134.6 |
| August | 114.4 | 152.5 |
| September | 96.4 | 126.3 |
| October | 92.6 | 118 |
| November | 92.7 | 114.5 |
| December | 105.5 | 126.3 |
More cities in Japan
Data and methodology
PVGIS 5.3 (European Commission Joint Research Centre), crystalline silicon, fixed free-standing installation, 1 kWp, 14% system losses, equator-facing panels with optimized tilt and the terrain horizon. Long-term climate estimates are not a forecast or a roof survey. Nearby buildings, trees, roof constraints, snow and local conditions can change actual output.
- Tokyo — Reference coordinates: 35.68, 139.69; Climate dataset / years: PVGIS-ERA5 / 2005–2023; Data retrieved: .
PVGIS methodology · Sources and assumptions (English) · Download the underlying data (JSON)