Solar energy in Juba, South Sudan
Average irradiation 5.63 kWh/m²/day · ~1644 kWh per kWp per year
Monthly solar irradiation & temperature in Juba (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 6.13 | 30.1 | 149 |
| Feb | 6.13 | 31.8 | 149 |
| Mar | 5.80 | 31.9 | 141 |
| Apr | 5.57 | 30.5 | 136 |
| May | 5.64 | 28.4 | 137 |
| Jun | 5.19 | 27.2 | 126 |
| Jul | 4.97 | 26.4 | 121 |
| Aug | 5.31 | 26.2 | 129 |
| Sep | 5.75 | 27.0 | 140 |
| Oct | 5.69 | 27.4 | 138 |
| Nov | 5.58 | 27.8 | 136 |
| Dec | 5.85 | 28.9 | 142 |
Solar potential of Juba explained
Juba receives an average of 5.63 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 1644 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places Juba among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Juba?
With 5.63 kWh/m²/day of average irradiation, a 1 kWp system in Juba produces roughly 1644 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 Juba?
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
Cairo (5.9) · Casablanca (5.3) · Lagos (4.6) · Nairobi (5.5) · Johannesburg (5.5) · Cape Town (5.3) · all cities →