Commercial Standby Generators

The cost varies significantly depending on generator output, fuel type, voltage and phase, enclosure, transfer equipment, and other features. Installation is typically a separate expense and can vary based on electrical work, fuel connections, permits, site preparation, and generator placement. When budgeting, consider the complete installed system rather than only the purchase price of the generator.

The correct size depends on the equipment you need to keep operating during an outage and how much power those loads require simultaneously. HVAC systems, refrigeration, pumps, compressors, motors, and other equipment can also have substantial startup demands. A proper load calculation should consider running loads, starting loads, voltage, phase, and potential future expansion rather than simply estimating generator size from the building's square footage.

Yes, when the generator is installed with compatible automatic transfer equipment. An automatic transfer switch monitors utility power and can signal the generator to start when an outage occurs, then safely transfer designated loads to generator power. When utility service returns and stabilizes, the system transfers the loads back and the generator completes its shutdown sequence.

Runtime depends on the generator model, fuel source, electrical load, maintenance requirements, and available fuel supply. A natural-gas generator may operate as long as an adequate gas supply remains available, while propane and diesel systems are limited by their stored fuel capacity. For extended outages, it's important to consider fuel consumption at different load levels and any manufacturer-required service intervals during prolonged operation.

Each fuel has advantages. Natural gas eliminates the need for a large on-site fuel tank where reliable gas service is available, while propane can be stored on-site for long periods. Diesel is widely used for demanding commercial and industrial applications and offers high energy density, but requires appropriate fuel storage and maintenance. Availability, expected runtime, generator size, local requirements, and your existing infrastructure should guide the choice.

Potentially, but it depends on the building's electrical demand and the generator's capacity. Whole-building backup can require a considerably larger generator if the facility contains HVAC systems, refrigeration, elevators, pumps, machinery, or other high-demand equipment. Some businesses instead back up only critical circuits or use load management to prioritize essential equipment, which can reduce the generator capacity required.

Single-phase power is common in smaller facilities and lighter commercial applications, while three-phase power is frequently used in larger commercial and industrial buildings with motors, machinery, and heavier electrical loads. Your generator must be compatible with the voltage and phase of the electrical system and equipment it will supply. Checking the building's electrical service before purchasing helps prevent costly compatibility problems.

Commercial standby generators are typically installed outdoors on an appropriate concrete pad or other manufacturer-approved foundation, with required clearances from buildings, openings, combustible materials, and other equipment. Placement must also account for exhaust, ventilation, fuel connections, electrical runs, service access, noise, and local requirements. Proper site planning can significantly affect both installation cost and future maintenance access.

Even a generator that rarely experiences an outage needs routine inspection and maintenance. Service may include engine oil and filter changes, battery inspection, fuel-system checks, coolant maintenance where applicable, and periodic operational testing. Many standby generators also perform scheduled exercise cycles to help confirm readiness. Maintenance intervals depend on the specific model, operating hours, and manufacturer requirements.

Before ordering, confirm your required generator capacity, electrical service voltage and phase, fuel source, transfer-switch requirements, installation location, and which loads need backup power. Commercial generators can have numerous electrical and configuration options, so verifying these specifications before purchase is important. If you're unsure which generator configuration your business requires, contact us at 1-888-976-5443 or help@outboundpower.com for personalized assistance.