What Is the Minimum Load for a Diesel Generator?

diesel generator connected to a portable load bank during load testing

Short Answer: A diesel generator should operate at no less than 30% of its rated load. Below this level, combustion temperature becomes too low, leading to wet stacking, carbon buildup, and long-term engine damage. In real projects, we recommend maintaining 50%–80% load for stable performance and engine longevity. Minimum Load Rule (Quick Reference) If you […]