Mount Gambier receives ≈ 4.0 kWh/m²/day of solar radiation, so a clean, north-facing 1 kW system typically produces 3.8 – 4.0 kWh/day.
| System size | Avg. kWh / day | Avg. kWh / year |
|---|---|---|
| 3 kW | ~11 – 12 | ~4,000 |
| 5 kW | ~19 | ~7,000 |
| 6.6 kW | ~25 – 27 | ~9,100 – 9,800 |
| 10 kW | ~38 | ~13,800 |
Even during winter, a 6.6 kW system will still deliver about 15–16 kWh per day, making Mount Gambier an excellent location for solar energy generation year-round.

