When you are looking for a standby diesel generator, the fuel consumption should be a consideration. You can benefit a lot from a highly fuel-efficient generator, such as fuel savings and lower operating expenses. In this article, we will provide you with a general guide to standby diesel generator fuel consumption.
What are standby diesel generators?
Standby diesel generators are diesel engine powered equipment that generate electricity and provide a reliable and efficient source of backup power for homes, businesses, and industrial facilities during power outages. Diesel generators have a reputation of longevity and fuel efficiency, they tend to consume less fuel for a similar task and can hold up through much wear and tear in a variety of environmental conditions. Standby diesel generators come in different power configurations and can meet your specific backup power needs during emergencies and power outages.
Fuel consumption of a standby diesel generator
Fuel consumption is one of the key considerations when purchasing a standby power generator. Generally, the fuel consumption of a generator set depends on a variety of factors, including the size of engine powering the generator, generator’s capacity, the load at which the generator is operating at, the fuel type and generator brand. Typically, diesel generators are more efficient than gasoline generators because diesel engines have a higher thermal efficiency. They use compression heat rather than spark ignition to burn fuel, which allows them to use less fuel for power output. For a diesel generator, the consumption rate can be measured with the LPH (Litres Per Hour) or GPH (Gallons Per Hour) unit. Manufacturers usually claim certain levels of fuel consumption in their marketing materials.
The chart below shows the average fuel consumption of standby diesel generator:
| Generator size (KW) | Liters/hour at 100% | Liters/hour at 75% | Liters/hour at 50% |
| 8 | 2.4 | 1.8 | 1.3 |
| 10 | 2.9 | 2.2 | 1.6 |
| 16 | 4.8 | 3.6 | 2.5 |
| 20 | 6.1 | 4.9 | 3.4 |
| 30 | 10.9 | 9.1 | 6.8 |
| 40 | 15.1 | 12.1 | 8.7 |
| 60 | 18.7 | 10.9 | 10.9 |
| 75 | 23.0 | 17.4 | 12.8 |
| 100 | 28.0 | 21.9 | 15.5 |
| 125 | 34.4 | 26.8 | 18.9 |
| 150 | 41.2 | 31.7 | 22.3 |
| 200 | 54.5 | 41.6 | 29.1 |
| 250 | 68.1 | 51.4 | 35.9 |
| 300 | 81.3 | 60.9 | 42.7 |
| 350 | 95.0 | 70.7 | 49.5 |
| 400 | 108.2 | 80.6 | 56.4 |
| 500 | 135.1 | 99.9 | 70.0 |
| 600 | 182.4 | 119.2 | 83.2 |
| 750 | 202.1 | 103.7 | 103.7 |
| 1000 | 269.1 | 197.2 | 137.7 |
Note: This table should only be used as an estimate. Actual usage may vary due to different factors.
How can you improve the efficiency of your diesel generator?
To reduce the fuel consumption of your standby diesel generator set, regular maintenance is essential. With proper generator maintenance, you can ensure uninterrupted power supply and peace of mind during critical situations. The maintenance check in a diesel generator set mainly includes regular inspections, cleanliness, fuel quality, oil changes, battery maintenance, load testing, and professional servicing.
Accumulation of the carbon deposits on the engine can cause excessive consumption of fuel. Thus, you need to remove them regularly and clean your generator. Follow the manufacturer’s manual if you are not sure how to keep the generator clean. Understanding the manufacturer's guidelines and specifications for your generator model is helpful to ensure the longevity and optimal performance of your diesel generator. Overloading or underloading your generator can result in high fuel consumption and shortened lifespan. It’s suggested that your generator is running on 75% of load and at least 50%.
Diesel management is also important for standby diesel generators. As a backup power source, your generator is not used as frequently, it is more common for the fuel to go bad. Typically diesel fuel can be stored for 6 to 12 months or longer if maintained properly. To improve the efficiency of your generator and reduce fuel consumption, your fuel should be sampled, tested, and properly maintained over time. Make sure you use the right, clean, high-quality fuel for your generator.
Contact Dingbo Power to get the right advice
If you are in need of any support regarding your standby diesel generator, contact us today. With almost 20 years of experience in this field, Dingbo Power can provide you with the right advice and a diesel generator to meet your unique requirements. As a professional manufacturer of diesel generators, we offer a variety range of high-quality generator sets of all sizes and types. Feel free to contact us with any questions, concerns, or inquiries to learn more about the products & services we provide.
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