Solar energy in Iloilo, Philippines
Average irradiation 5.18 kWh/m²/day · ~1513 kWh per kWp per year
Monthly solar irradiation & temperature in Iloilo (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 4.65 | 26.3 | 113 |
| Feb | 5.39 | 26.5 | 131 |
| Mar | 6.10 | 27.6 | 148 |
| Apr | 6.42 | 29.0 | 156 |
| May | 5.74 | 29.1 | 140 |
| Jun | 5.10 | 28.1 | 124 |
| Jul | 4.72 | 27.4 | 115 |
| Aug | 4.81 | 27.3 | 117 |
| Sep | 4.86 | 27.3 | 118 |
| Oct | 4.94 | 27.4 | 120 |
| Nov | 4.90 | 27.4 | 119 |
| Dec | 4.50 | 26.9 | 109 |
Solar potential of Iloilo explained
Iloilo receives an average of 5.18 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 1513 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places Iloilo among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Iloilo?
With 5.18 kWh/m²/day of average irradiation, a 1 kWp system in Iloilo produces roughly 1513 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 Iloilo?
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%.
Compare with nearby cities
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