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FIRMAN
Firman 4000W Dual Fuel Inverter Portable Generator WH03242

Firman 4000W Dual Fuel Inverter Portable Generator WH03242

4.5· 59 ratings

Best price now

$839.99at Energy Systems CentralObserved Nov 1, 2026, 8:55 AM

24% under what the other stores charge

Compared across 5 stores. Prices are checked against each store and labelled with when.

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Quick answers

Where is the Firman 4000W Dual Fuel Inverter Portable Generator WH03242 cheapest?
At Energy Systems Central, for $839.99, 24% under what the other stores charge, as of our latest check.
What do buyers say about the Firman 4000W Dual Fuel Inverter Portable Generator WH03242?
Rated 4.5 out of 5 from 59 ratings.
Where can I buy the Firman 4000W Dual Fuel Inverter Portable Generator WH03242?
5 stores we checked sell it, including Energy Systems Central, Ironva, Backup Generator Store, Walmart, eBay.

Firman 4000W Dual Fuel Inverter Portable Generator WH03242 prices at every store

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  • Energy Systems CentralNew

    In stockReturn policy

    $839.99Observed Nov 1, 2026, 8:55 AM
    Visit store
  • eBayNew

    In stock

    $1,099.49Observed Nov 1, 2026, 8:55 AM
    Visit store
  • IronvaNew

    In stockReturn policy

    $1,099.99Observed Nov 1, 2026, 8:55 AM
    Visit store
  • Backup Generator StoreNew

    In stockReturn policy

    $1,100.00Observed Nov 1, 2026, 8:55 AM
    Visit store
  • WalmartNew

    In stockSold by Supply the Home

    $1,273.09Observed Nov 1, 2026, 8:55 AM
    Visit store

Also available at

  • WalmartCheck price at Walmart
  • Energy Systems CentralCheck price at Energy Systems Central

Firman 4000W Dual Fuel Inverter Portable Generator WH03242 price history

Lowest price we've seen: $839.99 on Nov 1 at Energy Systems Central. Tracked across 3 stores since Nov 1.

From Energy Systems Central

  • Dual-fuel operation: runs on gasoline or propane
  • Electric and recoil start
  • CO Alert technology for added safety
  • FIRMAN 193cc Max Pro Series engine with cast iron sleeve
  • 1.8-gallon fuel tank with up to 9 hours run time at 25% load
  • Multi-featured control panel with covered outlets
Guarantee
3-year limited manufacturer warranty included.
Returns
30-day return window for eligible products that are unused and in original condition.
Shipping
Free standard shipping within the United States; most orders processed in 1 to 2 business days, delivery typically 3 to 7 business days.
In the box
Cover, Engine oil bottle, Oil funnel, Spark plug wrench, Screwdriver, 12V battery cable

About the Firman 4000W Dual Fuel Inverter Portable Generator WH03242

The FIRMAN WH03242 is a dual-fuel portable generator designed for RV enthusiasts, campers, and outdoor recreational use. It operates on both gasoline and propane, providing flexibility and convenience wherever you go. With a running power of 3200W on gasoline and 3000W on propane, it delivers reliable electricity for lights, appliances, and electronics.

Part of the Whisper Hybrid Dual Fuel Generator Series, the WH03242 operates quietly at 58dB—well below National Park sound standards—making it ideal for peaceful outdoor settings. Its electric and recoil start options, combined with FIRMAN’s proven engine technology, ensure dependable performance.

Included accessories such as a cover, engine oil bottle, oil funnel, spark plug wrench, screwdriver, 12V battery cable, LPG regulator, battery charger, and quick oil drain make setup and maintenance simple.

Features

Dual-fuel operation: Gasoline and Propane

Quiet operation at 58dB for ¼ load

Electric and recoil start

Low oil shutoff for engine protection

FIRMAN 193cc Max Pro Series engine with cast iron sleeve

1.8-gallon fuel tank with up to 9 hours of run time at 25% load

Multi-featured control panel with covered outlets

CO Alert technology for added safety

Wheel kit with 5.5" flat-free wheels and folding U-handle

3-year warranty

Specifications

Certifications: CARB Certified: Yes, EPA Certified: Yes, cETL Certified: Yes, NOM Certified: No, UL Certified: No

CO Alert: Yes

Running Watts: 3200W (Gas), 3000W (LPG)

Starting Watts: 4000W (Gas), 3750W (LPG)

AC Voltage: 120V

Frequency: 60Hz

Decibels: 58dB @ ¼ load

Run Time: 9 hrs at 25% load

THD @ Full Load: 3%

Specifications

color
MulticolorSource
Surge wattage
4000 WattsSource
Decibel rating
58 dBSource
Brand
FIRMANSource

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Weight
108 lbSource
Rec. use
ResidentialSource
Has written warranty
NoSource
Manufacturer
FIRMANSource
Product line
Whisper Hybrid Dual Fuel Generator SeriesSource
Has nrtl listing certification
NSource
Model
WH03242Source
Type
Portable
With Inverter
Yes
Power Source
Gasoline, Propane
Power Output
4 kilowatts
Capacity
1.8 gal tank
Number Of Outlets
4 outlets