Solar energy in Lisbon, Portugal
Average irradiation 4.79 kWh/m²/day · ~1399 kWh per kWp per year
Monthly solar irradiation & temperature in Lisbon (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.27 | 12.9 | 55 |
| Feb | 3.27 | 12.8 | 80 |
| Mar | 4.47 | 13.8 | 109 |
| Apr | 5.82 | 15.0 | 141 |
| May | 6.92 | 16.9 | 168 |
| Jun | 7.26 | 18.9 | 177 |
| Jul | 7.29 | 19.9 | 177 |
| Aug | 6.66 | 20.5 | 162 |
| Sep | 5.27 | 20.0 | 128 |
| Oct | 3.67 | 18.6 | 89 |
| Nov | 2.53 | 15.5 | 61 |
| Dec | 2.06 | 13.5 | 50 |
Solar potential of Lisbon explained
Lisbon receives an average of 4.79 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 1399 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places Lisbon among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Lisbon?
With 4.79 kWh/m²/day of average irradiation, a 1 kWp system in Lisbon produces roughly 1399 kWh per year. That is an excellent solar resource — payback periods are typically among the shortest worldwide.
How much electricity would a 5 kW system produce in Lisbon?
Approximately 7,000 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
London (2.6) · Paris (3.2) · Berlin (2.9) · Munich (3.3) · Madrid (4.8) · Barcelona (4.6) · all cities →