Solar energy in San Juan, Argentina
Average irradiation 5.84 kWh/m²/day · ~1705 kWh per kWp per year
Monthly solar irradiation & temperature in San Juan (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 7.99 | 24.4 | 194 |
| Feb | 7.14 | 23.1 | 174 |
| Mar | 5.99 | 20.6 | 146 |
| Apr | 4.69 | 16.5 | 114 |
| May | 3.51 | 12.3 | 85 |
| Jun | 3.22 | 10.1 | 78 |
| Jul | 3.49 | 9.2 | 85 |
| Aug | 4.52 | 11.3 | 110 |
| Sep | 5.78 | 13.8 | 141 |
| Oct | 7.08 | 17.7 | 172 |
| Nov | 8.13 | 21.0 | 198 |
| Dec | 8.47 | 23.3 | 206 |
Solar potential of San Juan explained
San Juan receives an average of 5.84 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 1705 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places San Juan among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in San Juan?
With 5.84 kWh/m²/day of average irradiation, a 1 kWp system in San Juan produces roughly 1705 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 San Juan?
Approximately 9,000 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
São Paulo (4.5) · Rio de Janeiro (4.8) · Buenos Aires (4.6) · Santiago (5) · Bogotá (4.4) · Lima (5.1) · all cities →