Running a generator above the capacity rating indicated on its label is as much wrong as running it below related capacity rating, because its service life might be shortened and it might suffer serious damage.
This is especially true for generators having large capacity ratings.
Minimum load allowed for standby generator sets is 30% of its total rating.
The following problems might happen if a generator runs without load or under low load:
- Its exhaust and air suction system might suffer lubricant or fluid leaks
- Carbon deposits might accumulate on its cylinder liners or exhaust manifold
- Parts of its engine might be damaged due to wear
- Lubricant might get thinned to cause the lubrication quality to decrease
- White smoke might be emitted