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Commercial · single & three-phaseCommercial Series 22-150 kW
Businesses and facilities that can't go dark — sized from a real load study. Installed and serviced in-house by a licensed electrical and gas contractor.
What's included
One fixed price, quoted to your home
Every installation includes the transfer switch, concrete pad, county permits, and standard gas hookup — one fixed written quote after a free on-site assessment.
Features
What's built in.
Nexus Digital Controller
Nexus Digital Controller with two lines, trilingual text, easily shows generator status, run time and history.
Liquid cooled engine
Liquid cooled engines available in low and high-speed options.
Aluminum, all-weather enclosure
Aluminum, all-weather enclosure option provides substantial protection from the elements. Aluminum’s corrosion resistance prolongs the life of your generator. Recommended for salt-air, coastal communities. Sturdy galvanneal steel enclosures are coated with Rhinocoat™ finish for added weather protection.
Quiet-Test™ Mode
Quiet-Test mode for a weekly self test that runs quieter than the competition.
Higher power nodes
Higher power nodes for large applications. Single and three phase output in a variety of voltages.
Choice of LP or Natural Gas
Continuous fuel choice of LP or natural gas.
Single and three phase output
Single and three phase output in a variety of voltages.
Wireless Remote Monitoring
Wireless remote monitoring is an available option.
Who we protect
Built for the businesses that can't go dark.
Medical & dental
Refrigerated vaccines and medications, life-safety systems, and appointment books that can't be rescheduled. NFPA 110 testing included in every service plan.
Restaurants & grocers
A walk-in cooler holds temperature for hours, not days. One outage of inventory usually costs more than a year of generator maintenance.
Property & HOA
Elevators, access gates, fire pumps, and common-area lighting for condo towers and gated communities — with documented compliance for your board.
Offices & professional
Servers, phones, and a payroll that runs whether FPL is up or not. Keep billing hours while the block goes quiet.
Warehousing & light industrial
Dock doors, climate control, and production lines with three-phase loads — sized from a real load study, not a catalog page.
Municipal & essential services
Lift stations, communications sites, and facilities with statutory backup requirements — with the inspection paperwork done right.
The commercial process
1 · Load study
Metered demand analysis and critical-circuit mapping of your facility.
2 · Engineering
Sizing, fuel design, sound attenuation, and sealed drawings for permitting.
3 · Installation
Crane set, three-phase transfer switchgear, and utility coordination.
4 · Compliance
NFPA 110 load-bank testing, logs, and annual documentation for insurers.
The lineup
Full catalog →Compare other sizes.
Guardian Series 8 kW
Guardian Series 11 kW
Guardian Series 14 kW
Guardian Series 17 kW
Guardian Series 20 kW
QuietSource Series 22 kW
QuietSource Series 27 kW
QuietSource Series 36 kW
QuietSource Series 48 kW
Commercial Series 50 Hz
