Picking the right diesel generator set is crucial whether you run a construction site, industrial plant, hospital, retail outlet, or need backup power at home. Here’s a simple guide to help you choose the best diesel generator set without getting overwhelmed.
1. Understand Your Power Requirements
Make a list of all the equipment you want to power with the diesel generator set—lights, computers, pumps, air conditioners, machinery, etc.
Each device has two key power numbers:
Running watts: Power when the device is on.
Starting watts: Extra power needed momentarily at startup, usually 2-3 times running watts for motors.
Add all running watts, then add the highest starting watt value to handle power surges.
2. Calculate Total Generator Size
Use this formula:
Total wattage = Total running watts + Highest startup watts
Add a safety margin of 20-25%:
Recommended size = Total wattage × 1.25
For example, if your equipment needs 10,000 running watts and 4,000 starting watts:
(10,000 + 4,000) × 1.25 = 17,500 watts
So look for a diesel generator set rated at least 17.5 kW.
3. Choose the Right Type and Features
Decide on the type of diesel generator set based on your usage:
Portable units for flexibility
Silent or soundproof for noise-sensitive places
Backup units for emergency power
Containerized or trailer-mounted sets for industrial needs
Features like automatic transfer switches (ATS) help switch power automatically during outages.
4. Budget Smartly
Bigger diesel generator sets cost more and use more fuel. Balance size with what you really need.
5. Consult Trusted Suppliers
Share your needs and calculations to get tailored advice. Ask about warranty, service network, and fuel efficiency.
