Load bank testing is a critical procedure for verifying the operational reliability and performance of power generators. This service involves simulating real electrical loads to test how well a generator can handle its highest output. Essential for identifying potential issues such as weak fuel injectors or worn components in a controlled setting before they become costly problems, load bank testing ensures that your generators are ready for emergency, continuous, or prime power deployment. With documentation provided, you’re also ready for your next NFPA 110 inspection.
Additionally, this process is crucial for preventing wet stacking, a condition that can occur when generators operate below their optimal capacity, leading to unburned fuel and carbon buildup.

We use advanced load bank testing equipment to simulate various electrical loads your generator will face in the field, from partial to full rated capacity. Running the unit at peak output confirms complete fuel combustion and identifies performance gaps before they become failures. Connections avoid altering permanent wiring, with voltage verified before access.

Following testing, you receive comprehensive performance analysis reports covering voltage, frequency, load response, and thermal imaging of the main output breaker under full load. These insights help identify strengths and pinpoint areas of your power system that may need adjustment or improvement, ensuring that your generators remain efficient and free of issues like wet stacking.

Load bank testing is seamlessly integrated with preventative maintenance schedules. This strategic integration not only prolongs the life of your generators but also ensures they operate efficiently and reliably. Regular load bank testing as part of maintenance helps avoid wet stacking by routinely verifying that the generator can perform at peak output when required.
NFPA 110 provides the ground rules for keeping an emergency or standby power system inspected, exercised, tested, maintained, and documented. If you’ve got a diesel generator, that usually means running it for at least 30 minutes a month under real operating temperature, either hitting the exhaust gas temperature your manufacturer recommends or pulling at least 30% of its nameplate kW.
If a monthly test doesn’t hit that mark, NFPA 110 has a fallback: a supplemental annual load bank test at 50% of the load for 30 minutes, then 75% for a full hour, running continuously for the full time. And if you’re running a Level 1 Emergency Power Supply System (EPSS), the kind used anywhere that a failure could put lives at risk, you’re also looking at a four hour test every 36 months.
Healthcare facilities have their own layer on top of that, NFPA 99. Most healthcare generators need to be tested 12 times a year, with at least 20 days and no more than 40 between tests.
Total Energy Solutions handles the planning, testing, and documentation for every one of these, so when the AHJ, CMS, insurance risk appraiser, or an accreditation surveyor shows up, your records are in order. See our compliance audits service for a broader look at where your system stands against code requirements.
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