Inland Empire Commercial Generator Experts

Inland Empire businesses depend on reliable electric power to keep operations moving through every shift, regardless of grid conditions or summer heat events. Duthie Power Services has been the trusted name in generator sales, rentals, maintenance, and repair for more than 60 years. We support facilities across Riverside, San Bernardino, Ontario, Fontana, and the surrounding region. We deliver dependable backup power solutions to warehouses, manufacturing plants, data centers, healthcare campuses, and other commercial operations. Our commercial generator expertise covers the full lifespan of your backup power source, from equipment selection and professional installation through ongoing service and repair.

Graphic drawing of a commercial generator tap box.

Generator Docking Stations

Permanent docking station installations that let your facility connect a portable rental generator in minutes during a planned outage or emergency.

Photo of two Duthie Power professional repair service technicians doing a quality assurance check on a generator.

Quality Assurance

Every service visit ends with documented diagnostics, run-test results, and a technician sign-off, so you have the records you need for compliance audits.

Closeup of plugs on a generator load bank. There are a number of benefits to load bank testing.

Load Bank Testing

Annual load bank testing verifies your standby generator can carry its rated load and meets NFPA 110 requirements for healthcare and other critical facilities.

What We Do

Our team supports Inland Empire operations managers, facility engineers, and industrial clients with full-service emergency backup generator solutions. We service all makes, models, and fuel types, and we scale our support to match single-unit installations or large standby generator fleets.

  • Electric Generator Sales in the Inland Empire

    Our sales engineers help you size and select diesel, natural gas, or LP vapor standby generators from Caterpillar, Cummins, Blue Star, Generac, Gillette, and Kohler, then coordinate professional installation for your site.

  • Generator Repair and Diagnostics

    Our union-trained, certified technicians repair electric generators, transfer switches, control panels, and full Emergency Power Supply Systems across all major brands, diagnosing common generator issues like difficulty starting, controller faults, and fuel contamination.

  • Commercial Generator Rentals

    Our rental fleet ranges from 22KW to 1,500KW for short-term projects, planned shutdowns, and extended outages, delivered with fuel tanks, distribution panels, transfer switches, and cabling.

  • Generator Maintenance Programs

    Routine inspections, oil changes, diesel fuel polishing, battery testing, and full diagnostics keep your backup generator ready and catch wear before it turns into emergency repairs.

  • 24/7 Emergency Service

    Our dispatch line is staffed around the clock, 365 days a year, so our Inland Empire technicians can respond the moment your generator fails or grid power drops.

  • Automatic Transfer Switch Service

    Your automatic transfer switch is the critical link between utility power and your standby generator, and any fault in the switch can keep a perfectly good generator offline during an outage. Our technicians perform full preventative maintenance on all makes and models of ATS equipment, including contact cleaning, lubrication, calibration, and functional testing. We also diagnose and repair transfer switch faults that cause failed-start events during a power outage.

Duthie Power Services Generator Technician Jack Greenberg cleaning his service truck.

Industries We Serve Across the Inland Empire

Duthie Power supports the Inland Empire’s most demanding commercial and industrial sectors, including warehousing and logistics, manufacturing, cold storage, data centers, healthcare, and education. Logistics and distribution clients rely on us to keep conveyor systems, refrigeration, and dock operations powered through any interruption in the electrical energy supply. Healthcare clients depend on our team for life-safety equipment and critical medical devices that cannot tolerate downtime. Our sales engineers and technicians understand the code requirements, uptime demands, and AQMD permitting realities specific to each sector.

Plan Ahead to Prevent Downtime

The most reliable backup power solution is one that is installed, maintained, and tested before you need it. A properly sized standby generator paired with an automatic transfer switch activates within seconds of grid failure, keeping critical systems online when utility electricity generation is interrupted. Regular service from our Inland Empire team keeps every component of your backup power source in working order, including the transfer switch, controller, fuel system, and load bank-tested alternator output. 

Photo of a Duthie Power Service technician working with an automatic transfer switch.

Frequently Asked Questions

Our regional coverage allows us to respond quickly throughout Riverside and San Bernardino Counties. Call our dispatch line to discuss your site location and timeline.

Generator sizing starts with your connected load, the equipment you need to keep running during a power outage, and your facility’s growth plans. Our sales engineers perform load calculations, review your electrical system, and recommend equipment by matching output voltage and generator power capacity to your application.

Yes. Our certified technicians repair and maintain generators by every major manufacturer in the United States generator market, including Caterpillar, Cummins, Blue Star, Generac, Gillette, and Kohler. We also service automatic transfer switches, control panels, diesel fire pump engines, and related power station equipment.

Yes. We build maintenance plans around your equipment’s age, runtime, and facility requirements. Plans typically include annual inspections, oil changes, diesel fuel polishing, and full diagnostics that catch issues before they cause a failure. Consistent service protects your electrical power capacity and keeps your backup power source ready for the next outage.

Yes. We sell and install natural gas standby generators for commercial and industrial facilities that prefer utility-supplied fuel over on-site diesel storage. Our team coordinates with reputable licensed electricians and local inspectors to complete professional installation, verify safe electric power distribution across your meter base and panel, and bring the unit online.

Expert Team at Your Service

Our Inland Empire operations are backed by experienced service managers and staffed by EGSA-certified generator technicians who live and work across Southern California. We lead with integrity, emphasize quality assurance, and go the extra mile for every customer. Whatever your power generator needs look like, including same-day emergency dispatch or a detailed site survey for a new installation, our team is ready to help.

Garrett Talbott

Southern California Sales Engineer

Garrett Talbott is a Southern California-based Sales Engineer at Duthie Power, where he brings extensive expertise in generator systems and a strong commitment to customer service for commercial clients.

Inland Empire’s Generator Experts

As a family-owned business serving Southern California for over 60 years, we work hard to deliver quality service for every customer. 

Call us today or use the Request a Quote form below. If this is an emergency, call us right away, we monitor the line 24/7.

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