Generator Load Bank Testing

Load bank testing runs your generator at real load to prove it can carry your building, burns off wet stacking and documents NFPA 110 load testing. Serving healthcare, commercial and industrial facilities across Central Florida since 1990.

1990

Serving Florida

NFPA 110

Load testing

24/7

Emergency service

Back-Up Power Services technicians servicing a Cummins generator

24/7 emergency service

Serving Central Florida since 1990

Cummins diesel standby generator

Starting is not the same as carrying the load

Most standby generators exercise with little or no building load. That proves the engine starts, not that it can deliver full power for hours during an outage.

Diesel engines that run lightly loaded also build up unburned fuel and carbon in the exhaust, known as wet stacking. Over time it reduces power and can lead to failure when the generator finally has to work.

A load bank test applies a controlled electrical load in steps, so we can see how your generator performs at real capacity while your building stays on utility power.

What a load bank test catches

Five problems that stay hidden during no-load exercise and show up under real load.

Wet stacking

Risk: lost power and failure

Unburned fuel builds up in diesel engines that run lightly loaded.

How we fix it: sustained load burns it off

Overheating

Risk: shutdown under load

Cooling problems appear only when the engine works hard.

How we fix it: temperatures watched at every step

Voltage and frequency drift

Risk: damaged equipment

Unstable output can harm sensitive loads when power transfers.

How we fix it: readings recorded at each step

Fuel delivery limits

Risk: starving at full load

Clogged filters may pass at idle but restrict fuel under load.

How we fix it: pre-test fuel system inspection

No proof of capacity

Risk: an NFPA 110 finding

Without a load test report, there is no record your system can carry the load.

How we fix it: a written test report

Does your generator need a load bank test?

Check every statement that applies to your generator. In thirty seconds you will know if a load bank test belongs on your schedule.

Schedule a load bank test

Load bank test checklist

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Check every statement that applies to your generator. Schedule a load bank test

What the test includes

A complete load bank test for your standby generator: inspection before, controlled step loading, live monitoring and a written report for your records.

Back-Up Power Services technicians servicing an emergency generator

Pre-test inspection

  • Fluids, belts and battery check
  • Fuel system and filter inspection
  • Safe connection of the load bank

Back-Up Power Services technician checking generator control panels

Step-load testing

  • Load applied in controlled steps
  • Up to the generator's rated capacity
  • Your building stays on utility power

Back-Up Power Services technician checking a generator controller for remote monitoring

Live monitoring

  • Voltage and frequency
  • Oil pressure and coolant temperature
  • Exhaust and wet stacking check

Back-Up Power Services technicians testing equipment in the shop

Test report

  • Readings at every load step
  • Issues found and recommendations
  • Ready for your NFPA 110 records

How a load bank test works

Most tests take a few hours, and your building stays on utility power the whole time. You receive a written report with the readings at each step.

Trusted by facilities across Central Florida

Brands we service

Kohler, authorized dealer
Generac, authorized dealer
Cummins, authorized dealer
Thomson Power Systems

Areas we cover

Orlando and Sanford
Leesburg and Clermont
Kissimmee and Lake Mary
Winter Park and Apopka

Frequently asked questions

How long does a load bank test take?

Most tests take a few hours, depending on the size of the generator and the test required. We schedule them to keep disruption to your facility to a minimum.

Will my building lose power during the test?

No. The load bank connects to the generator, so your building stays on utility power while we test.

How often should a generator be load bank tested?

Many facilities test once a year. We recommend a schedule based on how your generator is used and the requirements that apply to it.

What is wet stacking?

Wet stacking is unburned fuel and carbon that build up in a diesel engine's exhaust when it runs at light load. Running it at higher load during a load bank test helps burn it off.

Does NFPA 110 require load bank testing?

For emergency power systems, NFPA 110 calls for an annual load test when the monthly exercise does not reach the required load. A load bank test is the standard way to complete it.

Do you provide a report after the test?

Yes. You receive a written report with the readings at each load step and our recommendations, ready for your maintenance records.

Can you test any generator brand?

Yes. We test Kohler, Generac and Cummins generators as an authorized dealer, plus most other major brands.

What areas do you serve?

We perform load bank testing across Central Florida, including Orange, Seminole, Lake and Osceola counties.

Prove your generator can carry the load

Tell us your generator size and location, and we will schedule a test that fits your operation.