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Model#: GRCN5852

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Generac QP-40G 3.6 kW 120V QuietPact 40 Gasoline RV Generator

  • Generac QP-40G 3.6 kW 120V QuietPact 40 Gasoline RV Generator
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(continental U.S.)

Freight Orders

Freight deliveries require a delivery time be scheduled and someone must be present at the time of delivery to inspect and sign for the merchandise. A representative from the freight carrier will call the phone number entered at checkout to schedule the delivery.

Liftgate Service

For freight deliveries, you have the option of adding a liftgate to your delivery. A liftgate is the device that lowers a product from the truck to ground level.

CPO recommends adding liftgate service for freight deliveries exceeding 100 lbs if you do not have a loading dock or fork lift at the delivery address. Additional charges may apply. The liftgate option will be presented during the checkout process.

Please note that liftgate service only ensures the product is removed from the truck. We recommend you have the additional help of two to four people to move the product to its desired location because drivers are not required to assist.

Requesting liftgate service after ordering may result in additional charges and delays.

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Generac's commitment to innovative design shows in greater noise reduction through advanced piston and gear technologies and an enclosure with our exclusive RhinoCoat finish for added durability. Engine advancements greatly increase life expectancy and Generac RV generator owners also benefit from single side serviceability for easy maintenance access.
All-steel enclosure makes this unit among the quietest in its class. The perfect gas unit for Class B and C motorhomes, sport utility trailers, towable applications and fifth wheels with a single roof air conditioner.
Superior Fuel Economy - Optimized engine performance results in best fuel economy in its class, up to 43% more fuel efficient than competitive units.
  • Generac OHVI design maximizes engine breathing for increased fuel efficiency and plateau honed cylinder walls and plasma moly rings help engine run cooler, reducing oil consumption
  • Spiny-Lok cast iron cylinder walls for added durability and longer engine life
  • Superior lubrication to all vital bearings means better performance, less maintenance and significantly longer engine life
  • High temperature shutdown and a low oil pressure shutdown system prevent catastrophic engine damage due to low oil or overheating
  • Automatic voltage regulation regulates the output voltage to +/- 2%, prevents damage from voltage spikes
  • 2 Amp trickle charger maintains battery when generator is in use
  • Main line circuit breaker protects generator from overload
  • Durable, Rhino-coated wraps provide the ultimate protection against mother nature
  • Enclosed critical grade muffler is mounted inside the unit to prevent injuries while stationary or in transit
  • Includes a spark arrestor approved by the U.S. Forest Services
  • Small, compact, lightweight makes for an easy, eye appealing installation
  • Simple one-side serviceability for performing maintenance
  • For use with Class B and C motor homes (single air conditioning), fifth wheels, towable applications, sport utility trailers
  • RVIA, EPA and CARB Emissions Compliant
  • Replaces model 4709
  • Operator's Manual


Series: QuietPact
Length: 29.5 in.
Width: 19 in.
Depth: 13.5 in.
Weight: 170 lbs.
Amperage: 30
Cooling System: Air
Cylinders: 1
EPA Compliant: Yes
Enclosure Type: Steel
Engine Displacement: 220cc
Engine Make: Generac
Engine Model: OHVI
Engine Speed (RPM): 3600
Fuel Type: Gasoline
Motor Home Class: B and C (Single AC)
Motor Phase: 1
RVIA Comlpiant: Yes
Rated Watts: 3600
Starting System: Solid-State with Magneto
Voltage: 120V



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NOTE: ALL UNITS MUST BE INSTALLED BY GENERAC POWER SYSTEMS AUTHORIZED SERVICE FACILITIES.For a period of 3 (three) years of operation from the date of original sale, Generac Power Systems, Inc. (Generac) will, at its option, repair or replace any part which, upon examination, inspection and testing by Generac or a Generac Authorized Warranty Service Facility, is found to be defective under normal use and service, in accordance with the warranty schedule set forth below. Any equipment that the purchaser/owner claims to be defective must be returned to and examined by the nearest Generac Authorized Warranty Service Facility. All transportation costs under the warranty, including return to the factory, are to be borne and prepaid by the purchaser/owner. This warranty applies only to Generac generators sold and rated for “Recreational Vehicle” (RV) applications, as Generac has defined Recreational Vehicle generator applications. The factory recommends exercising the unit one half-hour every month.



100% (one hundred percent) coverage on part(s), labor, removal and reinstallation listed:

  • • Engine – All components
  • • Alternator – All components



100% (one hundred percent) coverage on part(s), labor, removal and reinstallation listed:

  • • Engine – All components
  • • Alternator – All components

    100% (one hundred percent) only on selected part(s) and labor listed [Any labor and part(s) not listed, and removal and reinstallation are the owner’s responsibility]:

    • • Rotor, Stator, Computer Control Board (part numbers 0A6060 and 0A3369) and inverter, (if applicable with regard to the generator) Cylinder Block, Cylinder Head, Crankshaft, Piston(s), Valve, Valve Lifter(s), Intake and Exhaust Manifolds

    Generac RV generators manufactured prior to December 31, 1997, DO NOT have a transferable warranty. Generac RV generators manufactured after January 1, 1998, have a transferable warranty to the second owner ONLY for the remainder of the three-year limited warranty. Proof-of-purchase is required and must be presented to a Generac Authorized Warranty Service Facility prior to the performance of any warranty service.

    All warranty expense allowances are subject to the conditions defined in Guardian’s Warranty Policies and Procedures Guide.


    • • Generac Guardian generators that utilize non-Generac replacement parts.
    • • Costs of normal maintenance, adjustments, installation and start-up.
    • • Repairs or diagnostics performed by individuals other than Guardian/Generac authorized dealers not authorized in writing by Generac Power Systems.
    • • Failures caused by any contaminated fuels, oils, coolants or lack of proper fluid amounts.
    • • Failures due, but not limited, to normal wear and tear, accident, misuse, abuse, negligence or improper installation. As with all mechanical devices, the Generac engines need periodic part(s) service and replacement to perform well. This warranty will not cover repair when normal use has exhausted the life of a part(s) or engine.
    • • Failures caused by any external cause or act of God, such as collision, theft, vandalism, riot or wars, nuclear holocaust, fire, freezing, lightning, earthquake, windstorm, hail, volcanic eruption, water or flood, tornado or hurricane.
    • • Damage related to rodent and/or insect infestation.
    • • Products that are modified or altered in a manner not authorized by Generac in writing.
    • • Any incidental, consequential or indirect damages caused by defects in materials or workmanship, or any delay in repair or replacement of the defective part(s).
    • • Failure due to misapplication.
    • • Telephone, cellular phone, facsimile, internet access or other communication expenses.
    • • Living or travel expenses of person(s) performing service, except as specifically included within the terms of a specific unit warranty period.
    • • Expenses related to "customer instruction" or troubleshooting where no manufacturing defect is found.
    • • Rental equipment used while warranty repairs are being performed.
    • • Overnight freight costs for replacement part(s).
    • • Overtime labor.
    • • Starting batteries, fuses, light bulbs and engine fluids.

    THIS WARRANTY IS IN PLACE OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED. SPECIFICALLY, GENERAC MAKES NO OTHER WARRANTIES AS TO THE MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

    GENERAC'S ONLY LIABILITY SHALL BE THE REPAIR OR REPLACEMENT OF PART(S) AS STATED ABOVE. IN NO EVENT SHALL GENERAC BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF SUCH DAMAGES ARE A DIRECT RESULT OF GENERAC'S NEGLIGENCE. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to you. This warranty gives you specific legal rights. You also have other rights from state to state.