StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › Firman
Firman
Firman WH03662OF Dual Fuel Inverter Generator

Firman WH03662OF Dual Fuel Inverter Generator

Best price now

$799.99at Project FoundryChecked Nov 9

18% under what the other stores charge

Compared across 10 stores. Prices are checked against each store and labelled with when.

Visit Project Foundry

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Price facts

  • Last seen at $799.99 at Project Foundry on Nov 9.
  • Checked at 10 stores.

Our take on the Firman WH03662OF Dual Fuel Inverter Generator

The Firman WH03662OF is an open-frame inverter generator that runs on gasoline or propane. It delivers 4200 peak and 3650 running watts on gas, or 3800 peak and 3300 running watts on propane. Inverter output is clean enough for laptops and phones, and electric start with recoil backup makes starting easy. The 50-amp outlet and included parallel cable let you run heavier loads or pair it with a second unit. It suits campers, cabin owners, job sites and home backup, but the open frame is louder than enclosed inverter models and it is not for sale in California.

Best forCampers and RV owners who want quiet, clean powerCabin and off-grid users with sensitive electronicsJob sites needing a 50-amp outletHomeowners wanting dual-fuel backup power
Pros
  • Runs on gasoline or propane for fuel flexibility
  • Inverter power is safe for laptops and phones
  • Electric start with recoil backup
  • 50-amp outlet handles heavier loads
  • Parallel-ready with cable included
  • CARB, EPA and cETL certified
Cons
  • Open frame is louder than enclosed inverters
  • Lower output on propane than gasoline
  • Not available in California
  • Heavier and bulkier than small suitcase inverters

Firman WH03662OF Dual Fuel Inverter Generator prices at every store

  • Project FoundryNew

    In stock

    $799.99Checked Nov 9
    Visit Project Foundry
  • AutoplicityNew

    In stock

    $960.14Checked Nov 9
    Visit Autoplicity
  • Prime Industrial USANew

    In stock

    $971.00Checked Nov 9
    Visit Prime Industrial USA
  • kidseyecandyNew

    In stock

    $971.00Checked Nov 9
    Visit kidseyecandy
  • Lowe'sNew

    In stock

    $999.00Checked Nov 9
    Visit Lowe's
  • MartDiscover.comNew

    In stock

    $2,397.00Checked Nov 9
    Visit MartDiscover.com
  • Martexplore.comNew

    Out of stock

    $679.15Checked Nov 9
    Visit Martexplore.com
  • Home DepotNew

    Out of stock

    $1,000.47Checked Nov 9
    Visit Home Depot
  • AP Electric & GeneratorsNew

    Out of stock

    $1,149.99Checked Nov 9
    Visit AP Electric & Generators
  • JBTools.comNew

    Out of stock

    $1,155.51Checked Nov 9
    Visit JBTools.com

Firman WH03662OF Dual Fuel Inverter Generator price history

Lowest price we've seen: $679.15 on Nov 9 at Martexplore.com. Tracked across 10 stores since Nov 9.

About the Firman WH03662OF Dual Fuel Inverter Generator

The Firman WH03662OF is a dual fuel inverter generator that runs on gasoline or propane. On gasoline it delivers 4200 peak watts and 3650 running watts. On propane it delivers 3800 peak watts and 3300 running watts.

Inverter technology produces clean, stable power for sensitive electronics such as laptops and phones. The generator starts with an electric start system, with a recoil start as backup. It has a 50-amp outlet and an open frame design that allows cooling and easy access for maintenance.

It is parallel ready. When connected to a compatible unit with the included parallel cable, it can double the power output. It is CARB, EPA and cETL certified. It can be used for camping, off-grid cabins, job sites and emergency backup power.

Fuel type
Dual fuel: gasoline or propane
Gasoline power
4200 peak watts, 3650 running watts
Propane power
3800 peak watts, 3300 running watts
Starting
Electric start with recoil backup
Outlet
50-amp outlet
Frame
Open frame design
Parallel
Parallel ready; parallel cable included
Certifications
CARB, EPA, cETL
In the box
Engine oil bottle, oil funnel, spark plug wrench, double open-ended wrench (10mm/12mm), 12V battery cable, LPG regulator with hose holder, adaptor, parallel cable and holder

Questions and answers

Is the Firman WH03662OF safe for sensitive electronics?
Yes. Its inverter technology produces clean, stable power that Firman rates as safe for laptops, phones and similar devices.
How much power does it make on propane versus gasoline?
On gasoline it delivers 4200 peak and 3650 running watts. On propane it delivers 3800 peak and 3300 running watts.
Can I connect two units together?
Yes. It is parallel ready and a parallel cable and holder are included, so you can pair it with a compatible unit to double output.
How does it start?
It has an electric start system with a recoil pull start as backup.
What comes in the box?
Engine oil, an oil funnel, a spark plug wrench, a 10mm/12mm open-ended wrench, a 12V battery cable, an LPG regulator with hose holder, an adaptor, and a parallel cable with holder.
Why can't it ship to California?
Firman states the unit cannot be shipped to California due to state regulations.
Where is the Firman WH03662OF Dual Fuel Inverter Generator cheapest?
At Project Foundry, for $799.99, 18% under what the other stores charge, as of our latest check.
Where can I buy the Firman WH03662OF Dual Fuel Inverter Generator?
10 stores we checked sell it, including Martexplore.com, Project Foundry, Autoplicity, Prime Industrial USA, kidseyecandy.

Stores we've priced the Firman WH03662OF Dual Fuel Inverter Generator at

  • Autoplicity deals and prices
  • Home Depot deals and prices
  • Lowe's deals and prices

More from Firman

  • F
    Firman P03501 3550/4450 Watt Gas Powered Portable Generator
    Firman P03501 3550/4450 Watt Gas Powered Portable Generator
  • F
    FIRMAN Tri Fuel Portable Generator 7850/6300W Electric Start
FIRMAN Tri Fuel Portable Generator 7850/6300W Electric Start
  • F
    Firman W01781 1700 Watt Inverter Generator
    Firman W01781 1700 Watt Inverter Generator
  • F
    Firman Dual Fuel Inverter WH03562OF
    Firman Dual Fuel Inverter WH03562OF
  • F
    Firman 3300-3000W Remote Start Inverter Generator
    Firman 3300-3000W Remote Start Inverter Generator
  • F
    FIRMAN P03613 4550/3650W Gas Portable Generator
    FIRMAN P03613 4550/3650W Gas Portable Generator
  • F
    Firman P03607 4550/3650 Watt Gas Recoil Start Generator
    Firman P03607 4550/3650 Watt Gas Recoil Start Generator
  • I
    INVERTER 3650/3300W ELECTRIC START
    INVERTER 3650/3300W ELECTRIC START
  • All Firman deals and products →

    More inverter generators

    • K
      Kingchii 4500W Gas Powered Inverter Generator with CO Sensor
      Kingchii 4500W Gas Powered Inverter Generator with CO Sensor
    • B
      BE Power Equipment BE4700ID 4,700-Watt Dual-Fuel Digital Inverter Portable Generator
      BE Power Equipment BE4700ID 4,700-Watt Dual-Fuel Digital Inverter Portable Generator
    • G
      Gewna 2450-Watt Dual Fuel Portable Inverter Generator
      Gewna 2450-Watt Dual Fuel Portable Inverter Generator
    • K
      Kingchii 2500-Watt Portable Inverter Generator
      Kingchii 2500-Watt Portable Inverter Generator
    • D
      DuroMax 11,000W Dual-Fuel Inverter Generator
      DuroMax 11,000W Dual-Fuel Inverter Generator
    • P
      Pulsar 2,200W Dual-Fuel Quiet Inverter Generator
      Pulsar 2,200W Dual-Fuel Quiet Inverter Generator
    • P
      Pulsar 2200-Watt Dual-Fuel Quiet Inverter Generator
      Pulsar 2200-Watt Dual-Fuel Quiet Inverter Generator
    • N
      Naturefalls 5500W Dual Fuel Inverter Generator
      Naturefalls 5500W Dual Fuel Inverter Generator