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Flex Power Onboard RV Generator - 5,500 Watts - Dual Fuel and Inverter - Fixed Mount
Flex Power

Flex Power Onboard RV Generator - 5,500 Watts - Dual Fuel and Inverter - Fixed Mount

Part Number: FP66FR
In Stock
$6,044.00
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Off-grid camping gets frustrating when appliances and electronics need more than battery power. This fixed-mount 4,700 - 5,500W generator uses inverter output, so RV loads and sensitive devices keep running. 1-800-940-8924 to order Flex Power generators part number FP66FR or order online at etrailer.com. Free expert support on all Flex Power products. Great prices and Fastest Shipping for Flex Power Onboard RV Generator - 5,500 Watts - Dual Fuel and Inverter - Fixed Mount. Generators reviews from real customers.
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Flex Power Generators - FP66FR

  • Inverter
  • Gas
  • Gas and Propane
  • Propane
  • Onboard Generator
  • Flex Power
  • 4001 Watts or More
  • 120V Output
  • Electric Start
  • Electronic Fuel Injection

Off-grid camping gets frustrating when appliances and electronics need more than battery power. This fixed-mount 4,700 - 5,500W generator uses inverter output, so RV loads and sensitive devices keep running.


Highlights

  • Onboard Power Away From Hookups: 4,700 - 5,500 watts keep RV power needs running off-grid.
  • Power for Sensitive Electronics: Built-in inverter output delivers low harmonic distortion for electronics.
  • Fuel Choice for Longer Stops: Gasoline or propane operation gives you two fuel options at camp.
  • Flexible Starting From Camp: Electric start, remote start capability, and backup recoil start support operation.
  • Quieter Load Changes: Variable speed engine adjusts to load for quieter operation.
  • Maintenance Support Included: Oil funnel, spark plug toolkit, and screwdriver support routine service.

Features to know about

Power for Off-Grid RV Loads


front facing generator

You pull into a campsite without hookups, but the RV still has appliances, chargers, and electronics to run. This fixed-mount generator supplies 4,700 - 5,500 watts, 43.3 amps, and 119-125 volts of onboard power. Your RV can keep running from an installed power source while you stay parked where you want to camp.

Electronics Stay Protected From Dirty Power

Charging a laptop or running a TV gets risky when generator power has too much distortion. Built-in inverter output delivers clean electricity with low harmonic distortion for sensitive electronics. Your devices stay plugged in and usable while the generator handles the RV load.

Starting Options From Inside or Outside


on off button

Bad weather, early mornings, or a dead start system can make generator startup a pain. Electric start, remote start capability, and backup recoil start give you more than one way to get power going. Start it from the RV controls or fall back on the recoil start and keep the trip moving.

Quiet Power That Doesn't Take Over the Campsite

Some onboard generators constantly rev up and down, making it hard to relax outside or even hold a conversation nearby. This generator uses inverter technology and a softer sound profile to keep noise levels more controlled as power demand changes. That means you can run the A/C, charge devices, or watch TV without the generator becoming the loudest part of camp. It also makes late nights, early mornings, and crowded campgrounds a lot less stressful for you and the people parked nearby.

Service Tracking Without Mental Notes

After weekend trips and off-season runs, it's easy to forget how many hours the generator has actually worked. The digital hour meter records run time, and included oil funnel, spark plug toolkit, and screwdriver support maintenance. Check the meter, handle the service, and get back to powering the next trip.

Notes:

  • This generator produces hot exhaust gases which must be piped out of the RV. The exhaust outlet is on the bottom of the generator. Please be sure to use the proper exhaust connections, hangers, and clamps. Before using this generator, be sure to install a carbon monoxide detector inside the RV.
  • Per manufacturer guidelines, the generator should be run for 2 hours each month under load to maintain proper operation and prevent fuel system issues.
  • CARB (California Air Resource Board), EPA, and National Park Approved.

Usage Guidelines:


What Size Onboard Generator Chat GPT


Wattage Usage Graphic Chat GPT

Specs

Electrical:

  • Watts: 4,700 - 5,500
  • Amps: 43.3
  • Volts: 119-125
  • RPM: variable 3,300 - 3,600
  • Frequency: 60 Hz

Dimensions and Weight:

  • Dimensions: 30" long x 20" wide x 13-1/2" tall
  • Weight: 161 lbs

Noise:

  • Sound level: 52 dB(A) @ 10 ft at half load
  • Meets National Park Service requirements of max 60 dB(A) @ 50 ft

Warranty:

  • 2-Year warranty


4L1-RV551-EFI RVMP Flex Power 5500e - 5,500W Onboard Generator - Dual Fuel - Inverter - Installed Generator

Installation Details FP66FR Installation instructionsAlternate Instructions FP66FR Installation instructions



Video of Flex Power Onboard RV Generator - 5,500 Watts - Dual Fuel and Inverter - Fixed Mount

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Flex Power Generators - 5500 Watts Dual Fuel and Inverter - FP66FR

Hi, everyone. Steve here with etrailer. Let's take a look together at the Flex Power Onboard RV Generator, 5,500-watts of dual fuel and inverter capacity. This is gonna be a fixed, permanent mount. So folks, whether you're replacing or upgrading, this, again, is gonna give you 5,500-watts of inverter power. It's gonna be clean, stable electricity, help you run everything between air conditioners, microwaves, and those sensitive electronics like laptops and TVs as well.

Now you can run this on both gas or liquid propane and it measures 30 inches long, 13-and-a-half inches tall and 20 inches deep or wide depending on how you're looking at it. Now this weighs 161 pounds outta the box, so make sure you have a friend helping you. If you don't wanna install it, no problems. We have an Installer Locator link below and you can simply enter information such as your zip code and based on where you're located, we can help find you and pair you up with trusted etrailer installers in your area. Now before I take off the cover, I do wanna mention a few things from the top here.

So you have a funnel, that's gonna be for filling up your fluids. You have this tool here, which is gonna be for, I believe, spark plugs, looks like. It's got the gas handle for the spark plug. And then of, course, you got the screwdriver with a Phillips and flathead that you can flip over depending on which one you need to use. So that's gonna be the toolkit that comes with this kit.

I'm gonna go ahead and put that in its pouch. It has a button and I'm gonna go ahead and set that outta the way here. And then I do wanna do a quick spin around on the turntable before I take the top off so you can see the unit with the cover on everything as well. Before I do that, you can always flip these two front levers up and reach the inside panel that way. And, of course, this is where you're gonna be as far as checking your oil.

You've got your meter here for run hours and stuff I believe. And then you have your 30-amp breakers here and you have the two reset and gas primer buttons, on/off switch. So this is gonna be your main access panel and this whole case is a hard plastic construction and then it's got the vent here to help direct airflow and stuff. So again, this will just go right back in place like that and then you would simply spin these back down and that's how that holds in place. So again, I do wanna spin it around. One of the standout features like I just mentioned is that is dual fuel compatible. So you can run it either on gasoline or propane. You can see the exhaust and the intake fans there and the flexibility of the fuel means that you can, you know, not have to worry about it when you're on the road. So gasoline's gonna give you maximum output. Protein's gonna give a little less output, but a lot cleaner and smoother operation and quieter operation. And here is your main electrical collection, your propane and your gas all here on the front side here or on the side. Then you get your ground and your positive hookup, nuts and bolts there. And of course the main electrical wire here as well. And I'm just kind of holding that out the way 'cause it gets in the way. And I do want to go ahead and pop off the cover now so we can take a look at the inside when we go more in depth about it. And I did have to remove two Phillip size or Phillip head, longer size bolts, or screws rather off the front, bear with me here. And this is made to only come off during maintenance, so bear with me while I get in here and get this open real quick. I loosened it before our time here, but the tolerances they give you on this, which is a good thing, keeps it nice and tight on the unit itself. I always like to show the inside. That way, you kind of see more of what you're getting and see it better. So I do wanna come back here with the lid. You've got foam insulation all the way around it and heat installation on this one side here and with the white, that's gonna help keep the heat down. And then that black foam insulation is going to double as sound installation more than anything. Okay, so now we got the top off. You can see the engine, you can see the muffler and everything over here on this side. So this does feature electronic fuel injection or EFI and that's gonna improve fuel efficiency. It's gonna reduce the maintenance compared to the carbureated systems that are out there on the market. And it's also gonna help ensure reliable starts every time, especially in those different conditions that are out there whenever you're boondocking or just traveling in general. Now, unlike traditional generators, the 5500E, this includes that integrated inverter we talked about at the beginning, that produces low harmonic distortion power and around 3%. So it's gonna make it safe, again, for those modern electronics, whether it's laptops, televisions, those kind of things that are sensitive to nice clean electric is what they want, they want that clean electric. You're also gonna get smart technology with remote start capability so you can fire the generator right from inside your RV along with built-in safety features like automatic shutdown and temperature protection if it we inchesre ever to get too hot or anything like that. And again, it's compact, it's lightweight, so it's been engineered as a direct replacement for many, many different install generators that are out there on the market. This should fit into those standard compartments with ease and in some cases, give you more room afterwards as well. So again, folks, whether you're boondocking, traveling cross country, or just want reliable backup power, the RVMP Flex Power here is a great option. Again, quiet, efficient, flexible power wherever you need it. Well folks, I think that's gonna wrap up our quick look together at this replacement Flex Power Onboard RV Generator. I'm Steven, thanks for watching.

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Info for this part was:

Employee Steven C
Installed by:
Steven C
Employee Mary K
Edited by:
Mary K
Employee Daron K
Updated by:
Daron K
Employee Dawn Z
Updated by:
Dawn Z
Employee Alex H
Written by:
Alex H

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