Solar energy in Coimbatore, India
Average irradiation 5.17 kWh/m²/day · ~1510 kWh per kWp per year
Monthly solar irradiation & temperature in Coimbatore (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 5.51 | 22.8 | 134 |
| Feb | 6.20 | 25.1 | 151 |
| Mar | 6.39 | 27.7 | 155 |
| Apr | 6.11 | 28.4 | 149 |
| May | 5.58 | 26.6 | 136 |
| Jun | 4.55 | 24.5 | 111 |
| Jul | 4.14 | 23.8 | 101 |
| Aug | 4.36 | 23.7 | 106 |
| Sep | 4.97 | 23.9 | 121 |
| Oct | 4.72 | 23.8 | 115 |
| Nov | 4.62 | 22.8 | 112 |
| Dec | 4.88 | 22.0 | 119 |
Solar potential of Coimbatore explained
Coimbatore 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 Coimbatore among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Coimbatore?
With 5.17 kWh/m²/day of average irradiation, a 1 kWp system in Coimbatore 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 Coimbatore?
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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