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.

Tri Fuel Portable Generator 11600W Electric Start 120V/240V with CO alert
Shop Now Shop for Tri Fuel Portable Generator 11600W Electric Start 120V/240V with CO alert
Tri Fuel Portable Generator 9400W Electric Start 120/240V with CO Alert
Shop Now Shop for Tri Fuel Portable Generator 9400W Electric Start 120/240V with CO Alert
Dual Fuel Inverter Portable Generator 4125W Electric Start with CO ALERT
Shop Now Shop for Dual Fuel Inverter Portable Generator 4125W Electric Start with CO ALERT
Inverter Portable Generator 3300W Remote Start
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Gas Portable Generator 15000W Electric Start 120/240V with CO Alert
Shop Now Shop for Gas Portable Generator 15000W Electric Start 120/240V with CO Alert
Gas Portable Generator 4550/3650W Remote Start 120/240V CO Alert
Shop Now Shop for Gas Portable Generator 4550/3650W Remote Start 120/240V CO AlertShop By Activity
Understand Wattage
Running Watts
‘Running Watts’ refers to the power required to continuously run an electrical device after it has already started.
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.
Determine Your Needs
Your generator should produce at least the calculated Total Starting Watts.
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1
Determine Devices
Determine all the devices you need to run simultaneously. Record the required Running & Additional Starting Watts of all the devices selected.
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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.
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3
Identify Highest Watts
Identify the device with the Highest Additional Starting Watts requirement and record that number.
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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!
SEE COMMON DEVICE WATTAGE
Power Outlet Guide
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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.
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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
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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.
SEE COMMON DEVICE OUTLETS