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Portable Diesel Generators
Portable Diesel Generators Built for Durability
A portable diesel generator trades some of the light weight of a gas unit for the fuel efficiency and long engine life diesel is known for, making it a strong choice for buyers who run their generator often rather than just during occasional outages. Our lineup includes Yanmar, Kubota, and Wildcat models ranging from the compact 3,700 watt YDG3700W up through 150,000 watt units mounted on trailers for heavier, sustained use.
Small Diesel Generators for Lighter Loads
Not every job calls for maximum output. The Yanmar YDG3700W and the MEC5 Maspower 5kW cover lighter needs, camping, smaller job sites, or backup for a handful of essential circuits, while still delivering diesel's characteristic reliability and fuel economy. A small diesel generator in this range is easier to transport and store than the larger industrial units, without giving up the durability diesel engines are known for over gasoline alternatives.
Stepping Up to Industrial-Grade Output
For buyers needing more continuous power, the Kubota GL7000 and GL11000, part of the Lowboy II series, deliver 7,000 to 11,000 watts in a low-profile, stable frame, with GL7000TM and GL11000TM variants adding output terminals for direct wiring into a subpanel or transfer switch. The Wildcat Patriot Mobile Diesel Generator and larger Yanmar units, including a 25kW model mounted on a trailer, extend into genuinely heavy-duty territory for job sites or properties needing substantial continuous output rather than occasional backup.
Making a Heavy Unit Actually Portable
Diesel generators at the larger end of this range aren't light, which is why Kubota offers dedicated wheel kits and a 4-wheel kit option for the GL7000 and GL11000 specifically. Adding a wheel kit turns what would otherwise require a forklift or multiple people to move into something one person can reposition around a property or job site without much difficulty, which matters more as output and engine size increase.
Frequently Asked Questions
Is a diesel generator actually more fuel efficient than a gas generator?
Generally yes, diesel engines extract more energy per gallon of fuel than gasoline engines running a comparable load, which translates to longer runtime per tank and lower fuel costs for frequent or extended use. The efficiency advantage becomes more noticeable the more often you run the generator, so buyers using their unit occasionally for short outages may not see as dramatic a difference as those running it regularly or for extended periods.
Do I need the wheel kit, or can I move a portable diesel generator without one?
For the smaller units like the YDG3700W, moving the generator without a wheel kit is manageable for most people. For the larger Kubota GL7000 and GL11000, which weigh considerably more, a wheel kit makes a real practical difference in whether one person can reposition the unit alone or whether it requires a forklift or several people to move. If you expect to relocate the generator around a property or job site regularly, the wheel kit is generally worth the added cost.
What's the difference between the standard GL series and the TM output terminal versions?
The standard GL7000 and GL11000 are built for plugging in individual devices or equipment directly through standard receptacles, while the TM versions add output terminals designed for a hardwired connection into a subpanel or transfer switch. If you're setting up the generator as part of a semi-permanent backup system rather than using it purely as a plug-in portable unit, the TM version is generally the better fit.
