Solar energy in Semarang, Indonesia
Average irradiation 5.17 kWh/m²/day · ~1510 kWh per kWp per year
Monthly solar irradiation & temperature in Semarang (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 4.40 | 26.2 | 107 |
| Feb | 4.56 | 26.0 | 111 |
| Mar | 5.13 | 26.4 | 125 |
| Apr | 5.14 | 26.6 | 125 |
| May | 4.99 | 26.4 | 121 |
| Jun | 4.86 | 26.0 | 118 |
| Jul | 5.20 | 26.1 | 127 |
| Aug | 5.82 | 27.2 | 142 |
| Sep | 6.22 | 28.4 | 151 |
| Oct | 5.97 | 28.6 | 145 |
| Nov | 5.32 | 27.6 | 129 |
| Dec | 4.43 | 26.6 | 108 |
Solar potential of Semarang explained
Semarang receives an average of 5.17 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 1510 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places Semarang among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Semarang?
With 5.17 kWh/m²/day of average irradiation, a 1 kWp system in Semarang produces roughly 1510 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 Semarang?
Approximately 8,000 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%.
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