Buying Guide Topics

Explore Generators Shop By Activity Understand Wattage Determine Your Needs Power Outlet Guide

Explore Generators

Power through anything life throws your way with our full lineup of dependable, high-performance generators. Built for home, work, play, and the unexpected.

Hybrid Series

Powerful and versatile, the Hybrid Series portable generator delivers quality power with Tri-fuel and Dual-Fuel capabilities on demand. Best used for home back-up power, job sites, farms, large RV’s, and buses.

Watt range: From 7500 to 12000 watts.

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Tri Fuel Portable Generator 11600W Electric Start 120V/240V with CO alert

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Tri Fuel Portable Generator 9400W Electric Start 120/240V with CO Alert

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Whisper Series

The Whisper Series provides a clean, quieter and efficient power source for any circumstance. Best used for RV camping, tailgates, and sensitive electronics.

Watt range: From 1000 to 5000 Running watts.

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BEST SELLER

Dual Fuel Inverter Portable Generator 4125W Electric Start with CO ALERT

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Inverter Portable Generator 3300W Remote Start

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Performance Series

Soulfully combining convenience and power, the Performance Series offers long-lasting, efficient power. Excellent for home projects, work-site, and home back-up power.

Watt range: From 4550 to 12000 Running watts.

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Gas Portable Generator 15000W Electric Start 120/240V with CO Alert

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new arrival

Gas Portable Generator 4550/3650W Remote Start 120/240V CO Alert

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Shop By Activity

Shop generators categorized by intended activity.
The FIRMAN Power Equipment TRI FUEL PORTABLE GENERATOR 15000W ELECTRIC START 120/240V WITH CO ALERT, equipped with a V-Twin engine, is set up outdoors, supplying 15000 watts of power to a workstation where a person is cutting wood with a saw.

HOME PROJECTS

SEE GENERATORS
A FIRMAN Power Equipment Refurbished Dual Fuel Inverter 4000W W/ Electric Start generator positioned in front of a camper van with its side and back doors open, parked in an outdoor area.

RV Camping

SEE GENERATORS
A person wearing a black shirt and tan pants wheels a FIRMAN Power Equipment Gas Inverter Portable Generator 6650/5300 Watt 120/240V CO Alert along a dirt path in an outdoor, wooded area.

TENT CAMPING

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Outdoor concert with a musician playing guitar and singing, audience seated in chairs, and a FIRMAN Power Equipment Zero E Portable Expandable Power Station nearby in a grassy field.

TAILGATING

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Understand Wattage

Power Required

Running Watts

‘Running Watts’ refers to the power required to continuously run an electrical device after it has already started.

SHOP 1000 – 5000 Watt Generators SHOP 6000 – 12000 Watt Generators
Initial Surge

Starting Watts

‘Starting Watts’ refers to the momentary surge of power required to start motor-driven products like a refrigerator. You may need to estimate this by using the following equation if Running & Starting Watts are not known: WATTS=VOLTS x AMPS.

SHOP 1000 – 5000 Watt Generators SHOP 7000 – 15000 Watt Generators

Determine Your Needs

Your generator should produce at least the calculated Total Starting Watts.

  1. 1
    Determine Devices

    Determine all the devices you need to run simultaneously. Record the required Running & Additional Starting Watts of all the devices selected.

  2. 2
    Add All The Watts

    Add the Running Watts of all items selected to be run simultaneously and record that number as your Total Running Watts.

  3. 3
    Identify Highest Watts

    Identify the device with the Highest Additional Starting Watts requirement and record that number.

  4. 4
    Calculate Total Watts

    Add your Total Running Watts to your Highest Additional Starting Watts. This is your Total Starting Watts required to power your devices!

    5. SEE COMMON DEVICE WATTAGE

Power Outlet Guide

  1. 1
    Check Outlets

    Review the devices you’ll be using and identify the plug types required (e.g., 5-20R, L5-30R, TT-30R, 14-50R). Mismatched outlets may require an adapter or a different model.

  2. 2
    Check Amps

    Determine the amperage (A) each device requires. Match this with the amperage rating of the generator’s outlets. For example:

    • Household devices = 15A–20A
    • RVs and welders = 30A–50A

    Be sure not to exceed the amperage limit of any single outlet

  3. 3
    Check Volts

    Identify whether your devices require 120V, 240V, or both. Ensure your generator supplies the correct voltage output. Many FIRMAN models offer 120V/240V dual capability, but always confirm your model matches your power needs.

    4. SEE COMMON DEVICE OUTLETS
A person plugs a yellow power cable into the blue and yellow generator control panel, featuring various switches, sockets, and meters on the robust 15000-watt TRI FUEL PORTABLE GENERATOR 15000W ELECTRIC START 120/240V WITH CO ALERT by FIRMAN Power Equipment.