Solar energy in Constanţa, Romania
Average irradiation 3.87 kWh/m²/day · ~1130 kWh per kWp per year
Monthly solar irradiation & temperature in Constanţa (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.32 | 2.8 | 32 |
| Feb | 2.13 | 3.7 | 52 |
| Mar | 3.35 | 6.5 | 82 |
| Apr | 4.90 | 10.4 | 119 |
| May | 6.03 | 16.5 | 147 |
| Jun | 6.56 | 21.6 | 160 |
| Jul | 6.62 | 24.3 | 161 |
| Aug | 5.91 | 24.6 | 144 |
| Sep | 4.30 | 20.4 | 105 |
| Oct | 2.69 | 14.9 | 65 |
| Nov | 1.52 | 9.9 | 37 |
| Dec | 1.15 | 5.0 | 28 |
Solar potential of Constanţa explained
Constanţa receives an average of 3.87 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 1130 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This is a solid mid-range solar resource: production is meaningful year-round, though winter output drops noticeably.
Frequently asked questions
Is solar worth it in Constanţa?
With 3.87 kWh/m²/day of average irradiation, a 1 kWp system in Constanţa produces roughly 1130 kWh per year. That is a good solar resource; with current panel prices most systems pay back well within their lifetime.
How much electricity would a 5 kW system produce in Constanţa?
Approximately 6,000 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 →