Over time, lightly loaded generator sets develop wet-stacking and carbon build-up in the combustion chambers and exhaust system.

The use of a load bank helps prevent this and determines the generator’s capability to produce maximum output in terms of amperage and horsepower.

The impacts of low load running potentially include:

• Increased lube oil consumption
• Poor engine performance
• Increased fuel consumption
• Crankcase pressurization

For engine only exercising and general engine maintenance a resistive only load bank is ideal for clearing carbon build-up in the engine, it is the most common and cost effective option for preventative maintenance.

Benefits to load bank testing

• Peace of mind– will the generator work when needed
• Regular load testing can increase the life and reliability of a generator
• Proves performance of the generator (resistive/reactive required for 0.8pf)
• Aids commissioning of generators for utility paralleling applications (resistive/reactive)
• Safe replication of emergency situations for new systems
• Demonstrate engine output for overhauled engines