Cummins Onan QG 6500 6.5kW RV Generator 6.5HGJAB-1272 RV Propane Single Phase 120 Volt Air Cooled New - A063B874
The Cummins Onan 6.5 HGJAB features exceptionally low vibration levels and is the quietest in its class. The 6.5 HGJAB is capable of running up to two air conditioners with power to spare. Cummins backs this generator with a standard 3 year limited warranty.
Features
- Air-cooled, single cylinder engine for reliable consistent power
- Easy maintenance with single-side service.
- Microprocessor control with diagnostics and lightweight, compact design.
- Completely enclosed with muffler, quick and easy to install.
- Meets National Park Service sound level requirements (60 dB(A) @ 50 ft) for use in national parks.
Specifications
| Battery For Electric Start |
Not Included |
| Warranty |
3 Year (Limited) |
| Weight (Lbs.) |
299 |
| Ship Weight (Lbs.) |
339 |
| Operating Weight (Lbs.) |
299 |
| Dimension No Wheel Kit |
22.2"W x 33.6"L x 16.7"H |
| Agency Compliance |
CARB (California), EPA, National Park Approved |
| Surge Start Watts |
6,500.0 |
| Continuous Rated Watts |
6,500.0 |
| Prime Rating Watts |
6,500 |
| Phase |
Single-Phase |
| Voltage |
120 |
| Rated Amps @ Min Volt (Commonly 120v) |
54.1 |
| Frequency |
60 Hz |
| Power Factor |
1.0 |
| Alternator |
Brush |
| Voltage Regulation |
1.1% |
| Voltage Regulation Type |
Digital |
| Frequency Regulation |
< 5% |
| Circuit Breakers |
30 Amp/20 Amp |
| Insulation |
Class H |
| Manufacturer |
Cummins |
| SKU |
6.5HGJAB-1272 |
| Model Number |
QG 6500 |
| Alternate Model Number |
A063B874 |
| Generator Grade |
Recreational |
Manual
User's Manual
Specification Sheet
Installation Guide
What our Experts Think
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Purpose-built RV power for mid-to-large rigs
The Cummins Onan QG 6500 (6.5HGJAB-1272 / A063B874) is a 6.5kW propane RV generator designed to deliver dependable onboard power for travel trailers, fifth wheels, and motorhomes.
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Strong output for dual A/C operation
Provides enough capacity to run up to two 13,500 BTU air conditioners plus onboard appliances, making it a solid fit for full-time RV use or hot-climate camping.
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Quiet, RV-friendly performance
Fully enclosed, low-vibration design keeps noise levels low for its class, meeting National Park sound standards around ~60 dB at 50 ft, improving campground comfort.
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Stable, clean electrical output
Digital voltage regulation helps maintain consistent power as loads change, protecting sensitive RV electronics and appliances during operation.
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Built-in diagnostics for easier maintenance
Integrated self-diagnostic system simplifies troubleshooting, reducing downtime and service complexity for RV owners.
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Simple, compact installation design
Air-cooled single-cylinder engine with enclosed muffler allows straightforward integration into RV generator compartments while minimizing vibration and noise transfer.
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Reliable propane operation
Runs on LP vapor fuel for clean combustion and easy fuel storage, making it practical for long trips and off-grid RV stays.
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Durability-focused RV engineering
Designed for continuous cycling and mobile environments, with a 3-year limited warranty and Cummins/Onan RV-grade build quality.
Q&A
Q: What is the Cummins Onan QG 6500 (6.5HGJAB-1272 / A063B874) RV generator?
A: The Cummins Onan QG 6500 is a 6.5kW (6,500W) propane-powered RV generator designed for motorhomes, fifth wheels, and travel trailers, providing reliable 120V single-phase onboard power for appliances and RV systems.
Q: What is its power output?
A: It delivers 6,500 running watts (6.5kW) at 120V, enough to run dual RV air conditioners and essential onboard loads depending on setup.
Q: What fuel does it use?
A: It runs on liquid propane (LP vapor), making it convenient for RVs with onboard propane tanks and eliminating the need for gasoline storage.
Q: Is it quiet during operation?
A: Yes, it is designed as one of the quietest generators in its class, operating around ~60–70 dB depending on load and distance, with an enclosed muffler system for noise reduction.
Q: What engine does it use?
A: It uses a Cummins Onan air-cooled engine (approx. 653cc, 2880 RPM) built for steady RV-duty performance and long service life.
Q: Does it have voltage stability features?
A: Yes, it includes digital voltage regulation and microprocessor control, helping maintain stable power for sensitive electronics and appliances.
Q: Can it run RV air conditioners?
A: Yes, it can typically support up to two 13,500 BTU air conditioners, depending on total electrical load and conditions.
Q: Does it include safety and diagnostics?
A: Yes, it features self-diagnostics, low-oil shutdown, overload protection, and fault monitoring for reliable operation and easier maintenance.
Q: What type of use is it best for?
A: It is ideal for RVs, motorhomes, and travel trailers needing built-in, automatic onboard power for extended trips and off-grid camping.
Maintenance Tips
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Follow scheduled oil changes to ensure smooth engine performance and long life.
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Replace air filter regularly to maintain clean airflow and efficient combustion.
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Inspect spark plug periodically and replace if worn for reliable starting.
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Check propane fuel system and connections for leaks before each use.
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Run generator monthly under load to keep internal components lubricated and ready.
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Keep cooling fins and vents clean to prevent overheating during RV operation.
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Inspect exhaust system for obstructions to ensure safe ventilation.
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Maintain proper oil level before operation to avoid engine damage.
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Clean exterior housing regularly to prevent dust buildup and corrosion.
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Schedule routine professional servicing for optimal RV generator performance.
Damage 
Loss 
Theft 
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