Firman WH03242 Dual Fuel 4000W Inverter Portable Generator | Electric | Outbound Power
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Firman WH03242 Dual Fuel 4000W Inverter Portable Generator | Electric Start With CO Alert

Original Price $1,409.99
Current Price $899.00

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Condition: New

SKU: WH03242
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Firman WH03242 Dual Fuel 4000W Generator Overview

The Firman WH03242 Dual Fuel 4000W Inverter Portable Generator is the perfect power source for your RV, camping trips, tailgating parties, and other outdoor activities. It's easy to use and maintain, and it will provide you with clean, quiet power for all your adventures.

This generator runs on either gasoline or propane, so you can always find the fuel you need. It has a running wattage of 3200W and a peak wattage of 4000W, so it can power a variety of appliances and devices. The Firman WH03242 is also one of the quietest dual-fuel generators on the market, running at only 57dB. This means you can use it without disturbing your neighbors or wildlife.


Firman WH03242 Dual Fuel 4000W Generator Powering an RV

Firman WH03242 Dual Fuel 4000W Generator Features

One of the Quietest Dual-Fuel Generators on the Market

The WH03242 is a part of the Whisper Hybrid Dual Fuel Generator Series. It runs at a quiet 58dB, well below National Park standards.


With a 120V, 30A RV – NEMA TT-30R A outlet, the Firman WH03242 comes RV-ready, so you can use it to charge your devices and appliances on the go.

Easy to Use

It has an electric start, so you don't have to pull a cord to get it started. It also has a low oil shutoff, which will stop the engine if the oil level gets too low.

Fuel Efficient

The Firman WH03242 is fuel-efficient, with a fuel economy of 1.25 gallons per hour on gasoline and 0.9 gallons per hour on propane. This means that you can get a long run time from a single tank of fuel.


What's In The Box

  • 1 x Firman WH03242 Dual Fuel 4000W Inverter Portable Generator
  • 1 x Protective Cover
  • 1 x Engine Oil Bottle
  • 1 x Oil Funnel
  • 1 x Spark Plug Wrench
  • 1 x Screwdriver
  • 1 x 12V Battery Cable
  • 1 x LPG Regulator (0.8m)
  • 1 x Floater Charger for the Battery and Quick Oil Drain


Firman 3-Year Warranty

Firman warrants to the original purchaser that the mechanical and electrical components will be free of defects in material and workmanship for a period of one (1) year (parts and labor) and three (3) years (parts and technical support) from the original date of purchase 90 days [parts and labor] and 180 days [parts] for commercial & industrial use.

If the product is still under warranty and after technical evaluation the product is determined to be defective as a result of manufacturing, not due to misuse or modification of the product, then Firman will replace the product.


Firman WH03242 Dual Fuel 4000W Generator Specifications

Output Specifications

Running Watts 3200 (Gas) | 3000 (LPG)
Starting Watts 4000 (Gas) | 3750 (LPG)
AC Voltage 120
Frequency (Hertz) 60
Decibels 58dB @ 1/4 load
Run Time 9hrs
THD @ Full Load 3%



CARB Certified Yes
EPA Certified Yes
cETL Certified No
CO Alert Yes
NOM Certified No
UL Certified No


Control Panel

Recoil Start Yes
Electric Start Yes
5-20R 120V 20A DUPLEX 1
TT-30R 120V 30A RV 1
DC Outlet 12V8.3A 1
Parallel Ports 2


Generator Specifications

Low Oil Shutoff Yes
Power Stream Alternator Yes
Cast Iron Sleeve Yes
UPC 840876132425
Unit Dimensions 23.2" x 17.8" x 17.9"
Unit Weight 90 lbs.
Carton Dimensions 28.7" x 18.9" x 19.3"
Carton Weight 108 lbs.


Fuel System Specifications

Fuel Type Gas/LPG
Tank Size 1.8 Gallon


Wheel Kit

Wheels 5.5" Yellow plastic flat free
Handle U shape folding handle



Firman WH03242 Dual Fuel 4000W Generator Instructional Videos


Firman WH03242 Manual

Customer Reviews

Based on 2 reviews
Ed T.
Amszing prices, Amazing customer service.

Great Companu to do business with! The courier lost my generator in shipment and the folks at Outbound stepped up when they didn't have to and completely handled it for me. In this day and age you don't find many companies that care about the customer after they have been paid. OUTBOUND POWER IS THE EXCEPTION! A÷÷. The generator was just as promised and works GREAT!

Thank you so much for your kind review, and we were happy to be of service. Most importantly, we're happy to learn the generator has met your expectations. Thank you for your business!

Wanakee M.B.

It is a wonderful unit. I am still receiving help to set it up! I was advised to purchase this particular one. The people at Outbound are helpful!

Thank you so much for your kind review! It's a thrill to know the generator is working out well for you. We appreciate your business!