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Cummins Diesel Generators
Cummins Diesel Generators: Standby, Commercial, and RV Options
A Cummins diesel generator covers three distinct use cases in this collection: automatic standby systems for home or light commercial backup, Commercial QD and Mobile SD units built for job site or mobile applications, and QD RV generators engineered for onboard motorhome installation. Output ranges from 3.2kW up to 100kW, giving buyers options across residential, commercial, and RV-specific needs within a single trusted diesel platform.
Standby Diesel: C20D6, C50D6, and C100D6C
The C20D6, C50D6, and C100D6C install permanently with an integrated fuel tank, connecting to a home or property's electrical panel through an automatic transfer switch. These units start automatically within seconds of an outage, making them the right choice for buyers wanting hands-off, whole-property backup rather than a portable or mobile solution. The C100D6C's 100kW capacity extends well beyond typical residential needs into light commercial or very large home territory.
Commercial QD and Mobile SD: Job Site and Business Use
The Commercial QD series, spanning 5kW to 12kW, and the Commercial Mobile SD 20 HDKDB at 20kW, are built for job sites and business applications rather than fixed home installation. The Mobile SD's single and three-phase configuration adds flexibility for commercial electrical setups that specifically require three-phase power, distinguishing it from the single-phase-only residential standby units elsewhere in this collection.
QD RV Generators: Built for the Road
For RV owners, the Cummins diesel generators in the QD 3200 through QD 12,500W range cover a wide span, from 3.2kW for lighter diesel needs up to 12,500 watts for Class A motorhomes running multiple air conditioners or a residential refrigerator simultaneously. These units are engineered specifically for onboard RV mounting, distinct from the Commercial QD and SD models built for fixed or mobile commercial use.
Frequently Asked Questions
What's the difference between the Commercial QD and the QD RV generators?
Despite sharing the QD naming, the Commercial QD series is built for job site or fixed commercial installation, while the QD RV generators are engineered specifically for onboard motorhome mounting with the compact sizing and integration RV installation requires. The two aren't interchangeable despite similar wattage ranges, since their physical design and intended installation differ significantly.
Do I need single-phase or three-phase power for a commercial application?
Most residential and many small commercial applications run on standard single-phase power, so three-phase, available on the Commercial Mobile SD 20 HDKDB, is only necessary if your specific equipment or electrical setup requires it. Checking with an electrician about your property's actual phase requirements before choosing is worth doing if you're unsure which your commercial application needs.
How much bigger is the C100D6C than a typical residential standby unit, and who actually needs it?
At 100kW, the C100D6C delivers roughly five times the output of the 20kW C20D6, putting it well beyond what a typical home needs even with substantial simultaneous electrical demand. This capacity generally suits very large residential properties, light commercial facilities, or applications requiring significant continuous backup power rather than standard whole-home coverage.
