Solar energy in Nantes, France
Average irradiation 3.47 kWh/m²/day · ~1013 kWh per kWp per year
Monthly solar irradiation & temperature in Nantes (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.09 | 5.3 | 27 |
| Feb | 1.98 | 5.3 | 48 |
| Mar | 3.15 | 7.8 | 77 |
| Apr | 4.61 | 10.7 | 112 |
| May | 5.43 | 13.9 | 132 |
| Jun | 5.96 | 17.4 | 145 |
| Jul | 5.80 | 19.1 | 141 |
| Aug | 5.02 | 18.8 | 122 |
| Sep | 4.00 | 16.2 | 97 |
| Oct | 2.31 | 12.8 | 56 |
| Nov | 1.36 | 8.7 | 33 |
| Dec | 0.95 | 5.5 | 23 |
Solar potential of Nantes explained
Nantes receives an average of 3.47 kilowatt-hours of solar energy per square metre per day, measured over four decades of satellite observation. In practical terms, every kilowatt-peak of installed PV capacity yields about 1013 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. While winters are dark, modern panel prices mean solar can still be economical — self-consumption value matters more than raw sunshine here.
Frequently asked questions
Is solar worth it in Nantes?
With 3.47 kWh/m²/day of average irradiation, a 1 kWp system in Nantes produces roughly 1013 kWh per year. That is a moderate solar resource; economics depend more on local electricity prices and incentives, which our AI planner can research for you.
How much electricity would a 5 kW system produce in Nantes?
Approximately 5,000 kWh per year — enough to cover a large share of a typical household's consumption.
What data is this based on?
Long-term satellite observations from NASA POWER (1981–present) and the PVGIS SARAH3 database, assuming a performance ratio of 80%.
Compare with nearby cities
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