Load Bank Testing

In Horry County, where hurricanes and tropical storms frequently cause extended power outages, your commercial standby generator must perform flawlessly when it matters most. Load bank testing is the only reliable way to verify that your generator can handle full load conditions in a controlled, non-emergency environment.

At Cooper Electrical Services, we perform expert commercial generator load bank testing as part of our comprehensive maintenance programs. As the only family owned unlimited license electrical contractor in Myrtle Beach, specializing in generators, we help businesses ensure their Cummins, Generac, and Kohler systems are ready for peak demand — preventing failures during critical times.

Why Load Bank Testing Is Essential for Your Business

Most monthly generator exercises run under little or no load, which doesn’t reveal how the system will perform during a real outage. Load bank testing applies a controlled artificial load that gradually increases to 100% of the generator’s rated capacity. This simulates actual operating conditions and uncovers hidden issues that routine checks might miss.

Key benefits include:

• Verifies the generator can sustain full load without overheating or voltage/frequency drops.
• Tests the cooling system, alternator, voltage regulator, and fuel delivery under real stress.
• Prevents wet stacking in diesel generators (carbon and unburned fuel buildup in the exhaust) by burning off deposits at proper operating temperatures.
• Identifies potential problems early, reducing the risk of expensive emergency repairs and downtime.
• Provides documented proof of performance for insurance, regulatory compliance, and peace of mind.

The Load Bank Testing Process

Our trained technicians follow industry best practices:

1. Connect a portable or permanent load bank to the generator output.
2. Run the generator at no load until it reaches normal operating temperature.
3. Gradually apply increasing loads (typically stepping up to 30%, 50%, 75%, and 100% of rated kW).
4. Monitor and record critical parameters: voltage, amperage, frequency, oil pressure, coolant temperature, and exhaust readings.
5. Maintain full load for the required duration, then step down the load and allow proper cool-down.
6. Provide a detailed report with results and any recommended corrective actions.

Testing is typically performed annually or as required by your maintenance agreement, and it can often be scheduled with quarterly or annual service visits.

Compliance with NFPA 110 and Other Standards

Many Horry County facilities (healthcare, hospitality, retail, and critical operations) must meet NFPA 110 requirements for emergency power systems. Load bank testing helps satisfy annual supplemental load testing for diesel units and supports Joint Commission or other accrediting standards. We document every test thoroughly to help you maintain compliance.

Why Choose Cooper Electrical Services for Load Bank Testing

• Performed by our own in-house team — no subcontractors.
• Integrated with our Commercial Generator Service Agreements for priority scheduling and cost efficiency.
• Local expertise with Grand Strand weather, coastal conditions, and Horry County codes.
• Full-service support: if issues are found, we can handle repairs on the spot or schedule follow-up work quickly.
• Applies to all major brands and fuel types (with special focus on diesel wet stacking prevention).

We proudly serve commercial properties throughout Myrtle Beach, North Myrtle Beach, Conway, Little River, Loris, Carolina Forest, Pawleys Island, and all of Horry County.