Cummins Onan QG 2800i DF Dual Fuel RV Inverter Generator | A079R895

Cummins Onan QG 2800i DF: compact dual-fuel power for Class B RVs

The Cummins Onan QG 2800i DF is a purpose-built, installed RV inverter generator for owners who want reliable onboard power without giving up valuable space. Cummins designed this model around Class B camper vans and compact motorhomes, pairing a 2,800-watt output with gasoline and LP vapor capability, electronic fuel injection, and variable-speed inverter technology.

This is the kind of generator that makes a real difference on the road. It can support the essential loads that keep a van comfortable, including a properly sized RV air conditioner, battery charging, lighting, electronics, and everyday appliances. Because engine speed responds to electrical demand, the generator does not have to run at one fixed speed all the time.

Why choose the Onan QG 2800i DF?

• Dual-fuel flexibility: operate on gasoline or LP vapor to match your RV build and travel plans.
• Clean inverter power: regulated pure sine wave output is suited to modern RV electronics, chargers, and appliance controls.
• Electronic fuel injection: EFI supports dependable starts and precise fuel delivery across changing travel conditions.
• Variable-speed operation: engine speed follows load demand to help reduce unnecessary noise and fuel use.
• Compact installed design: sized for Class B camper vans and smaller RV generator compartments.
• 50-state emissions compliance: designed for gasoline EVAP and propane applications in all 50 states.
• Cummins support: backed by a 3-year limited manufacturer warranty and the Cummins service network.

Best use cases

• Class B camper vans and compact motorhomes
• Factory-style onboard generator installations
• Off-grid camping and boondocking
• Running a properly sized RV air conditioner
• Charging house batteries while powering essential 120V loads
• RV owners who want the option of gasoline or propane

Full specifications

What is included?

• 1 × Cummins Onan QG 2800i DF installed RV generator
• Manufacturer documentation

Installation note: This is an installed RV generator, not a portable generator. Correct compartment clearances, ventilation, exhaust routing, fuel-system work, electrical protection, and remote controls are application-specific. Professional RV-generator installation is strongly recommended.

Frequently asked questions

Does the QG 2800i DF run on both gasoline and propane?

Yes. It is designed for gasoline EVAP and LP vapor applications. The RV installation determines the final fuel plumbing and controls.

Is this a 120V or 120/240V generator?

This model supplies 120V, single-phase power at 60 Hz. Its 2,800-watt rating equals approximately 23.3 amps at 120 volts.

Can it run an RV air conditioner?

Cummins positions the QG 2800i DF for Class B camper vans, and the unit is commonly selected to run a properly sized 13,500 BTU RV air conditioner. Actual starting demand varies by air conditioner, elevation, temperature, soft-start equipment, and other loads running at the same time.

Is the power safe for electronics?

The inverter system produces regulated pure sine wave AC power for sensitive RV electronics, battery chargers, and modern appliance controls.

Is a starting battery included?

No. A compatible starting battery and application-specific cables are required.

Can it replace an older Onan 2800?

It may be suitable for many RV applications, but compartment dimensions, mounting, ventilation, exhaust, fuel, wiring, and controls must all be checked before purchase. Model family alone does not guarantee a direct fit.

Does it require professional installation?

Yes, professional installation is recommended. An installed generator must meet Cummins instructions and applicable RV, electrical, fuel, exhaust, and carbon-monoxide safety requirements.