Fuel use by size
| Size | 25 percent load | 50 percent load | 75 percent load | 100 percent load |
|---|---|---|---|---|
| 20 kVA | 1.8 L/h | 2.9 L/h | 4 L/h | 5 L/h |
| 30 kVA | 2.6 L/h | 4.2 L/h | 6 L/h | 7.5 L/h |
| 60 kVA | 4.8 L/h | 7.8 L/h | 11 L/h | 14 L/h |
| 150 kVA | 11 L/h | 18 L/h | 26 L/h | 33 L/h |
| 250 kVA | 18 L/h | 30 L/h | 42 L/h | 55 L/h |
| 500 kVA | 35 L/h | 60 L/h | 85 L/h | 110 L/h |
| 1,000 kVA | 70 L/h | 118 L/h | 170 L/h | 220 L/h |
Approximate figures for modern diesel generators. Actual use depends on the engine and load.
Working out fuel cost
- Pick the litres per hour at your expected load.
- Multiply by running hours.
- Multiply by the current UAE diesel price per litre, published monthly.
Example: a 60 kVA generator at 75 percent for 10 hours uses about 110 litres.
How to cut fuel use
- Size the generator to the real load, see what size generator you need.
- Switch off AC and lights in empty areas.
- For 24 hour sites, use two smaller units and run one at night.
Last updated 10 November 2026. Figures are typical for UAE conditions; we confirm sizing for every job.
