Solar energy in Zagreb, Croatia
Average irradiation 3.59 kWh/m²/day · ~1048 kWh per kWp per year
Monthly solar irradiation & temperature in Zagreb (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.28 | -0.8 | 31 |
| Feb | 2.04 | 1.0 | 50 |
| Mar | 3.21 | 5.5 | 78 |
| Apr | 4.43 | 11.0 | 108 |
| May | 5.45 | 15.7 | 133 |
| Jun | 6.25 | 20.3 | 152 |
| Jul | 6.35 | 22.8 | 154 |
| Aug | 5.44 | 22.4 | 132 |
| Sep | 3.77 | 16.6 | 92 |
| Oct | 2.43 | 11.1 | 59 |
| Nov | 1.37 | 5.6 | 33 |
| Dec | 1.07 | 0.5 | 26 |
Solar potential of Zagreb explained
Zagreb receives an average of 3.59 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 1048 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 Zagreb?
With 3.59 kWh/m²/day of average irradiation, a 1 kWp system in Zagreb produces roughly 1048 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 Zagreb?
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
London (2.6) · Paris (3.2) · Berlin (2.9) · Munich (3.3) · Madrid (4.8) · Barcelona (4.6) · all cities →