Solar energy in Tirunelveli, India
Average irradiation 5.26 kWh/m²/day · ~1536 kWh per kWp per year
Monthly solar irradiation & temperature in Tirunelveli (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 5.21 | 24.0 | 127 |
| Feb | 5.86 | 26.1 | 143 |
| Mar | 6.09 | 28.3 | 148 |
| Apr | 5.81 | 28.6 | 141 |
| May | 5.50 | 27.3 | 134 |
| Jun | 5.09 | 25.9 | 124 |
| Jul | 5.05 | 25.3 | 123 |
| Aug | 5.38 | 25.4 | 131 |
| Sep | 5.53 | 25.6 | 134 |
| Oct | 4.95 | 25.4 | 120 |
| Nov | 4.23 | 24.4 | 103 |
| Dec | 4.42 | 23.6 | 107 |
Solar potential of Tirunelveli explained
Tirunelveli receives an average of 5.26 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 1536 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places Tirunelveli among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Tirunelveli?
With 5.26 kWh/m²/day of average irradiation, a 1 kWp system in Tirunelveli produces roughly 1536 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 Tirunelveli?
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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