Fuel Consumption
This chart approximates the fuel consumption of a diesel generator based on the size of the generator and the load at which the generator is operating. Please note that this table is intended to be used as an estimate of how much fuel is burned during operation and is not an exact representation due to various factors including generator/engine manufacturer, model, age and load.
Diesel (Gal/hr)
| Generator Size (kW) | 25% Load | 50% Load | 75% Load | 100% Load |
|---|---|---|---|---|
| 20 | 0.6 | 0.9 | 1.3 | 1.6 |
| 30 | 1.3 | 1.8 | 2.4 | 2.9 |
| 40 | 1.6 | 2.3 | 3.2 | 4 |
| 60 | 1.8 | 2.9 | 3.8 | 4.8 |
| 75 | 2.4 | 3.4 | 4.6 | 6.1 |
| 100 | 2.6 | 4.1 | 5.8 | 7.4 |
| 125 | 3.1 | 5 | 7.1 | 9.1 |
| 135 | 3.3 | 5.4 | 7.6 | 9.8 |
| 150 | 3.6 | 5.9 | 8.4 | 10.9 |
| 175 | 4.1 | 6.8 | 9.7 | 12.7 |
| 200 | 4.7 | 7.7 | 11 | 14.4 |
| 230 | 5.3 | 8.8 | 12.5 | 16.6 |
| 250 | 5.7 | 9.5 | 13.6 | 18 |
| 300 | 6.8 | 11.3 | 16.1 | 21.5 |
| 350 | 7.9 | 13.1 | 18.7 | 25.1 |
| 400 | 8.9 | 14.9 | 21.3 | 28.6 |
| 500 | 11 | 18.5 | 26.4 | 35.7 |
| 600 | 13.2 | 22 | 31.5 | 42.8 |
| 750 | 16.3 | 27.4 | 39.3 | 53.4 |
| 1000 | 21.6 | 36.4 | 52.1 | 71.1 |
Natural Gas (ft³/hr)
Natural gas burn varies with the engine and the gas, so these figures come from the NPI Series spec sheets, at full load, rather than from a generic curve. Ask for the sheet for any other unit.
| Unit | Output (kW) | Natural gas at 100% load (ft³/hr) |
|---|---|---|
| NPI250 | 250 | 3,086 |
| NPI350 | 350 | 5,346 |
Propane (Gal/hr)
| Generator Size (kW) | 25% Load | 50% Load | 75% Load | 100% Load |
|---|---|---|---|---|
| 20 | 0.87 | 1.31 | 1.89 | 2.32 |
| 30 | 1.89 | 2.62 | 3.49 | 4.22 |
| 40 | 2.32 | 3.34 | 4.65 | 5.82 |
| 60 | 2.61 | 4.22 | 5.52 | 6.98 |
| 75 | 2.76 | 4.94 | 6.69 | 8.87 |
| 100 | 3.78 | 5.96 | 8.43 | 10.76 |
| 125 | 4.5 | 7.27 | 10.32 | 13.23 |
| 135 | 4.8 | 7.85 | 11.05 | 14.25 |
| 150 | 5.23 | 8.58 | 12.22 | 15.85 |
| 175 | 5.96 | 9.89 | 14.11 | 18.47 |
| 200 | 6.83 | 11.2 | 16 | 20.94 |
| 230 | 7.7 | 12.8 | 18.18 | 24.14 |
| 250 | 8.29 | 13.81 | 19.78 | 26.18 |
| 300 | 9.89 | 16.53 | 23.41 | 31.26 |
| 350 | 11.49 | 19.04 | 27.19 | 36.50 |
| 400 | 12.94 | 21.62 | 30.99 | 41.59 |
| 500 | 16 | 26.9 | 38.39 | 51.91 |
| 600 | 19.2 | 31.99 | 45.81 | 62.24 |
| 750 | 23.7 | 39.84 | 57.15 | 77.65 |
| 1000 | 31.41 | 52.93 | 75.76 | 103.39 |