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Firman
Firman Dual Fuel Portable Generator – 4550/3650W

Firman Dual Fuel Portable Generator – 4550/3650W

Best price now

$599.00at Backup Generator StoreChecked 11 h ago

33% under what the other stores charge

Compared across 7 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Last seen at $599.00 at Backup Generator Store on Nov 10.
  • Checked at 7 stores.

Our take on the Firman Dual Fuel Portable Generator – 4550/3650W

The Firman Dual Fuel 4550/3650W is a portable generator that runs on gasoline or propane, with 4,550 peak watts and 3,650 running watts on gas. It has a CO sensor that shuts the unit down when carbon monoxide builds up, plus low-oil shutdown and a Power Stream alternator for cleaner power to sensitive electronics. It suits home backup, RV trips and job sites where a 120V supply is enough. Against rivals like the Champion 4500W dual fuel, it stands out for the CO shutdown and electric start, but it is heavy at 112 lbs and louder than inverter generators.

Best forHome backup for a fridge, lights and a few appliancesRV and camping trips that need 120V powerJob sites and outdoor eventsOwners who want the option of propane storage
Pros
  • Runs on gasoline or propane
  • CO sensor shuts the unit off at dangerous levels
  • Electric start plus recoil backup
  • Power Stream alternator gives cleaner power for electronics
  • Up to 14 hours runtime at half load on gas
  • 5-gallon tank with fuel gauge
Cons
  • Heavy at 112 lbs; not easy to move alone
  • Recoil start is still needed if the battery is flat
  • 67 dB is loud next to inverter generators
  • 120V outlets only, no 240V for well pumps or dryers
  • Propane cuts output below the gas rating

Firman Dual Fuel Portable Generator – 4550/3650W prices at every store

  • Backup Generator StoreNew

    In stock

    $599.00Checked 11 h ago
    Visit Backup Generator Store
  • JBTools.comNew

    In stock

    $599.99Checked 11 h ago
    Visit JBTools.com
  • JB ToolsNew

    In stock

    $930.20Free shippingChecked 11 h ago
    Visit JB Tools
  • Outbound PowerNew

    Availability unknown

    $899.99Checked 11 h ago
    Visit Outbound Power
  • Green Vista LivingNew

    Availability unknown

    $899.99Checked 11 h ago
    Visit Green Vista Living
  • Grid GetawayNew

    Availability unknown

    $899.99Checked 11 h ago
    Visit Grid Getaway
  • Build the PowerNew

    Availability unknown

    $899.99Checked 11 h ago
    Visit Build the Power

Store links may earn us a commission. Some prices via Klarna.

Firman Dual Fuel Portable Generator – 4550/3650W price history

Lowest price we've seen: $599.00 on Nov 10 at Backup Generator Store. Tracked across 7 stores since Nov 10.

What reviewers say

Owners of Firman dual fuel generators generally report reliable starting and steady power for home backup and RV use. The CO shutdown and dual fuel option draw praise, while weight and noise come up as the main drawbacks.

What people mention
  • WeightCriticisedOwners say 112 lbs makes it hard to lift into a truck or move around a yard without help.
  • NoiseCriticisedAt 67 dB it is noticeably louder than inverter generators, which matters on campsites with quiet hours.
  • CO shutdownPraisedBuyers value the sensor that cuts the engine when carbon monoxide rises.
  • Dual fuelPraisedRunning on propane is seen as convenient for storage and long outages.
  • StartingPraisedThe electric start is reported to fire up quickly, with recoil as a backup.
  • OutputMixedUsers note propane delivers less power than gasoline, so heavy loads need gas.

Specifications

Fuel Type
Dual Fuel
Fuel Capacity
5 gallon
Fuel Gauge
Yes
Continuous Output
3650 W (Gas)
Power Output
4550/3650W
Runtime
Up to 14 hours (at 50% load)
Voltage
120 Volts

Questions and answers

Can it run a refrigerator and a furnace fan?
Yes. With 3,650 running watts on gas it handles a fridge, lights, a fan and a TV together. Add a window AC or well pump and you may exceed the running watts.
How long does it run on a full tank?
Firman rates it at up to 14 hours at 50% load on gasoline. Heavier loads shorten that, and propane runtime depends on the tank size.
Does it work with a transfer switch?
It has 120V outlets only, so it pairs with a 120V transfer switch or inlet box. It cannot feed 240V circuits like a dryer or well pump.
Is the CO sensor automatic?
Yes. The sensor shuts the engine off when carbon monoxide reaches dangerous levels, and it restarts once the air clears.
What comes in the box?
The generator, a wheel kit, a handle, a battery for electric start and a propane hose regulator are typically included. Check the listing for the exact bundle.
Is it safe to run indoors?
No. Portable generators must run outdoors, away from windows and doors, even with a CO sensor.
Where is the Firman Dual Fuel Portable Generator – 4550/3650W cheapest?
At Backup Generator Store, for $599.00, 33% under what the other stores charge, as of our latest check.
Where can I buy the Firman Dual Fuel Portable Generator – 4550/3650W?
7 stores we checked sell it, including JB Tools, Backup Generator Store, JBTools.com, Outbound Power, Green Vista Living.

Stores we've priced the Firman Dual Fuel Portable Generator – 4550/3650W at

  • Green Vista Living deals and prices

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Peak Output
4550 W (Gas)
Starting Method
Recoil start
Frequency
60 Hz
Protection
Power Stream Alternator
CO Sensor
Yes
Low Oil Shutdown
Yes
Automatic Shut Off
Yes (if dangerous carbon monoxide levels are detected)
Number Of Outlets
3
Weight
112 lbs
Depth
27.6 (Carton Dimensions)
Height
21.6 in (Unit)
Width
21.8 in (Unit)
Noise Level
67 dB (1/4 load)
Typical Users
RV ready
Electric Start
Yes
Recoil Start
Yes