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Cummins Onan 5.5 HGJAB-1270 Generator Review

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A top of the range Dual Fuel Generator

This is another RV ready dual fuel generator from Cummins Onan that is one of the leaders in its field. It is from their Quiet Gasoline Series RV QG range. 

One of the best ways to see the United States is to take a road trip in a recreational vehicle (RV). In today's environment, RV owners tend to be more technologically adept, and it's not unusual for them to want to bring electronics along on their trip.

Fortunately, owning and using technology is now more accessible than ever before. Throughout the last 100 years, Cummins Onan has been the industry leader in silent RV power.

Cummins Onan's RV QG 5500 LP Propane Generator Set RV QG 1270 is the quietest and most vibration-free generator in its class. Installing and troubleshooting are made easier by its self-diagnostic capabilities.

You're insured for three years under the manufacturer's warranty, and the digital voltage control assures stability even if the load on the device changes.

What are dual fuel generators?

The unique capacity of dual fuel generators to run on a mixture of two fuels is driving their rising popularity. They have the potential to be a versatile and dependable power generation resource. You should, however, familiarize yourself with dual-fuel generators before making a purchase.

A stable power solution is provided by a dual fuel model, which utilizes two fuel blends concurrently. Starting with one type of fuel and gradually mixing in the other through the use of a device is how most engines work.

A more efficient method of consuming fuel to generate electricity has been found through the use of this mixture.

Because they can run on just one fuel source, dual fuel generators are essentially a bi-fuel system. Although most generators are preprogrammed to start up in the presence of the principal fuel supply, this is not always the case. 

What are the pros for dual fuel generators?

In the first place, dual fuel generators reduce the amount of expensive fuel that must be stored. Due to the use of dual fuel generators, the generating set can run on natural gas instead of diesel, reducing the need for diesel storage. In addition, even if the natural gas runs out, the engine may still run on diesel.

The use of two fuel systems means that dual fuel generators are more expensive up front, but they are less expensive to operate in the long term than single fuel generators.

Generators that run on either, gasoline and propanel are more efficient than those that run just on diesel for example. 

With a dual-fuel generator, you can select from a wide variety of fuel alternatives. The type of generator you purchase should be determined by the proximity of gasoline stations to your home. 

Dual fuel generators are a more eco-friendly option generally.

What are the potential drawbacks of having a dual fuel generator?

Geographical location has a significant impact on the composition of natural gas. This discrepancy can have a negative impact on the engine's performance.

Dual fuel generators are more difficult to operate. Complication is almost always the result of adding more features. To avoid these pitfalls, only buy from a reliable brand that has many customer-verified reviews.

Cummins 40KYFA6747 4000W Gas Generator

Single-fuel generators are a better option if you only need a little amount of power on a semi-regular basis. 

In comparison to a single fuel generator, the strain of meeting the generator's dual fuel requirements can be overwhelming.

Summary of the Cummins Onan 5.5 HGJAB-1270 Generator


Features
An integrated design with an enclosed muffler for quiet operation. The quietest in its class.
It's quite simple to set up.
Self-diagnostic power to make things easier, excellent for troubleshooting.
In terms of electricity, it can run one or two air conditioners, with plenty of juice spare for other things.
Stability is ensured through digital voltage management.
Loads on appliances fluctuate.
Limited warranty of three years, lifetime of the drive warranty.
Powered by either gas or LP.
Dimensions, mass, and decibel level: Weight: 288 pounds (131 kg). Its length is 853 mm, and its breadth is 22.2 mm. A height of 16.7 inches (563 mm) (425 mm). In terms of sound, it measured 69 decibels (dB) at 10 feet (3 m).
Meets the sound level regulations of the National Park Service. Noise levels of (60 dB(A) at 50 ft) are permitted in national parks. Noise levels will be reduced even further if the installation is standard without any mods.

Who is the Cummins Onan 5.5 HGJAB-1270 Generator for?

There is no need to worry about this generator set meeting the requirements of CARB and EPA Tier 4 Final and Phase IV for all motorized recreational vehicle generator sets. All 50 states are covered.

The Cummins Onan RV QG 5500 LP 5.5HGJAB-1270 starts and runs two 15,000 BTU air conditioners with an additional 1000 watts for lights and other appliances in Class A, Class B, and Class C RV motorhomes, truck campers, and RV trailers.

What You'll Get As Standard
Cummins Onan OHV engine with mechanically adjustable governor.
Pressurized Thru Flow cooling system, vibration-isolation mounting system, universal mounting tray.
USDA Forest Service-approved spark-arrestor muffler, replaceable dry element air cleaner, integrated control box, instant one-touch stop switch, and an A-frame frame.
Fuel filtration system, (LPG): electronic fuel pump, electric fuel solenoid, positive fuel shutdown, enclosed muffler, and three-point fuel shutoff.
Sound-attenuated enclosure, remote waterproof connector; automotive starter with automated start.
Spin-on, full-flow oil filter. Protectors against low oil pressure, excessive speed, and current surges are all included in the Models and ratings section.
120-inch (3-meter) generator set output leads with low power factor field overcurrent protection, voltage control in a digital environment.

How does the Cummins Onan 5.5 HGJAB-1270 Generator perform?

For all trailered RV applications, the Onan RV QG 5500 LP Generator satisfies CARB and EPA regulations in all 50 states for RV Motorhomes and Truck Campers. Both single-pole 30-Amp Circuit Breakers and digital voltage regulators are included in the Cummins.

With the 5500-Watt propane generator, you'll get 120-inch-long output leads for connecting to the RV's main AC panel and a sealed remote start connector. Cummins Onan QG 5500 LP weighs 288 pounds and measures 33.6 inches by 22.2 inches by 16.7-inches high, making it one of the smallest portable generators on the market.

Relax and have fun RVing in our national parks! When placed at a distance of 50 feet from a wall, the Onan 5500 LP Generator is quiet enough to comply with National Park Service noise standards of 60 decibels (A).

Expect to hear less than 69 decibels (dB) at a distance of 10 feet. Because of the vibration isolation, the Cummins Onan 5500 Propane Generator runs smoothly and quietly throughout the whole enclosure. The USDA Forest Service has authorized the muffler's integrated housing and steel base.

Overcrank and field overload protection, over/under frequency and loss of AC signal, mechanical faults, starter faults diagnostics, and troubleshooting are features for Cummins Onan 5500 Propane Generator Microprocessor control unit.

With its automated choke, replacement air filter, and electric solenoid positive LPG fuel shutdown, the 5500-Watt Propane Generator works well. a 12-volt 3-wire negative ground remote rocker switch from the remote panel is also a great feature.

In addition to a 3-year limited guarantee, the RV QG 5500 LP comes with a free 90-day minor adjustment policy and a lifetime driving warranty.

The Cummins Onan 5500 Generator Manual is included in the box.

Engine Details
Component: Cummins Onan OHV EH65V gasoline engine 4-cycle, 90-degree, OHV.
8:1 ratio of compression, and displacement of 39.8 cubic inches (653 cubic centimeters).
The maximum amount of force: Gas-powered models have 12.9 bhp (9.6 kW) of power, while LP-powered ones have 10.7 bhp of power (8.0 kW).
Centrifugal blower, generator set positioned for maximum efficiency, pressurized system, vertical flow.
Engine and generator set control air flow is included in the cooling air volume. Temperatures are measured in Fahrenheit (F) and Celsius (C), while cooling air flow is measured in cubic feet per minute (CFM).
Replaceable dry element air cleaner for the fuel system, an electric fuel pump with positive fuel shutoff (3 psi) and fuel lift of 3 ft is used in this side-draft carburetor (0.9 m), combustion air volume at rated load: 14.6 ft3 per minute (0.41 m3 per minute), combustion air volume at rated load: 14.9 ft3 per minute (0.42 m3 per minute) for an LPG side-draft mixer with demand regulator.
An electronic magneto-type ignition system with resistor plugs is employed.
Remoting, 12-volt, three-wire automotive-type starter with steel gears and pinion, automatic start disconnect, and a connector for the remote start cable are included in the starting system.
Positive displacement lube pump, spin-on, full flow lube oil filter, low oil pressure cutoff, and dipstick are all included.
Including the filter, the oil volume is 2.0 quarts.
Crankcase of a cylinder: An iron cylinder liner is cast into the aluminum octagonal block.

After sales support for the Cummins Onan 5.5 HGJAB-1270 Generator

Genuine part for the Cummins Onan 5.5 HGJAB-1270 Generator

There are a wide variety of components and accessories available from Cummins Inc. that are developed specifically for your Onan generator to keep it in optimum condition. Genuine Onan Green Label PartsTM from Cummins Inc. are also available, and these parts are designed to meet the exact specifications of your generator set, allowing you to get the most power out of your generator while also extending its lifespan.

Huge distribution network for the Cummins Onan 5.5 HGJAB-1270 Generator

Generator sets from Cummins Onan are backed by the industry's largest and best-trained global certified distributor/dealer network. Using this network of Cummins Onan distributors and dealers, you will be able to find exactly what you need to satisfy your individual needs.

Parts, accessories, and supplies for common generator set maintenance are all available over the same network, as are manuals and specification documents. In addition, they can answer your questions about correct operation, maintenance schedules, and other issues you might have.

Accessories
P/N 300-5331) is a remote start and stop rocker switch.
Infrared remote control (P/N 300-5332) with on-board timer and start/stop switch.
Power supply voltmeter with remote control (P/N 300-5333).
10 ft (P/N 338-3489-01), 30 ft (P/N 338-3489-02) of remote control plug and wire harness.
When the temperature is 0 degrees Fahrenheit (18 degrees Celsius), the battery has 360 cold cranking amps.
Kit (P/N 148-1161) to convert to LPG vapor fuel.
P/N 405-6699 - Under floor mounting kit.
Template for installation (P/N 539-2057).
There are two sizes of tailpipe kits available: 22 inches (part number 155-3481-01) and 26 inches (part number 155-3481-02).
3.0 in. (P/N 155-2610), 7.0 cm. (P/N 155-2424), and 12.50 cm. (P/N 155-2610-01) are the standard lengths for straight exhaust tubes.
Auto-starting energy command system EC-30 (P/N 018-02030).
A remote control for starting and stopping the energy supply, as well as diagnostics, is provided by the EC-20.
EC-15W Wireless Start/Stop EC-15W.

Easily accessible manuals for the Cummins Onan 5.5 HGJAB-1270 Generator

The generator set comes with operating and installation manuals. Request the following manual numbers from your Cummins Onan distributor/dealer: operation (A035D009), installation (A035D005), parts (983-020 I15), service (A035D009), and warranty (A035D006) (A035D011).

Warranty policy for the Cummins Onan 5.5 HGJAB-1270 Generator

For the first two years of ownership of your RV generator set, this limited warranty covers nearly everything except routine maintenance, and covers parts and labor on critical power train and generator set parts during the third year of ownership.

With this policy, Cummins Inc. will make small adjustments during the first three months of ownership - at no additional cost to you! Only RV generator sets used in RV applications are covered by this 3-year limited warranty. Generator sets used in commercial mobile applications are not covered.

It is the policy of the HGJ series generator sets used in recreational vehicles to provide a lifetime warranty on the drive train belt and pulley. In the case of an original owner, this guarantee covers both parts and labor costs. The warranty on the powertrain will only cover belts and pulleys for subsequent owners.

Final Thoughts

What comes with the Cummins Onan brand is a level of trust and faith in terms of reliability and durability.

Onan generators are likely to outlast the vehicle they are in, that's how much they can be trusted. The Cummins Onan 5.5 HGJAB-1270 Generator is no exception and it would be an excellent purchase if you decided to buy it. 

About Tom Bell

Hey, I’m Tom, the owner of Generator Reviews! I built this website to help you get the very most out of your generator and select the correct one for your personal circumstances. This site contains reviews of virtually every generator, detailed buying guides, as well as maintenance advice to help you keep yours in tip-top shape!

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