Firman Generators

Firman has 4 units on Outage Geek, priced from $999 to $1,400. The least expensive Firman model here is the Firman T07571 Tri-Fuel at $999, and the lineup below runs cheapest first.

~$999

Portable Generator · Tri Fuel (Gas/LP/NG) · 74 dB

Firman T07571 Tri-Fuel

The Costco tri-fuel that made natural-gas backup a thousand-dollar proposition. The T07571 runs 7,500 watts on gasoline, 6,750 on propane, and 5,500 on natural gas, ships with both LP and NG hoses in the box, and has a 50-amp outlet; owners buy it to hook a portable straight to the gas meter. The hardware: electric start, 8-gallon tank, a 213-lb frame, and a 3-year warranty that beats Predator's 90 days. The recurring complaints: it's a loud 74 dB open frame, propane starts give some units trouble, and NG output is a real 27% derate that owners report sagging further at higher loads. Costco's return policy is frequently cited as the real warranty.

7,500 W / 9,400 W surge · up to well pump or a small central AC

running: 7,500 W
Transfer switch: transfer-switch ready

Best for Budget-minded homeowners with natural gas who want set-and-forget fuel flexibility for storm season.

Full spec sheet

~$1,130

Inverter Generator · Gasoline · 58 dB

Firman W03083

Firman's Whisper-series 3 kW inverter, with electric start and a key-fob remote that works from 168 feet away, which is a handy feature on a cold morning. The 171cc engine makes 3,000 running and 3,300 starting watts, enough for a fridge, a furnace blower and a few lights, or a 13,500 BTU RV air conditioner on a soft start. The remote start and the build get good marks, and Firman's Arizona-based service is easier to reach than brands that route support overseas, by owner accounts. The complaints are price and noise: at $1,130 it sits above WEN and DuroMax models with more output, and the 58 dB figure is taken at a quarter load, so it is louder when you are running appliances. It has no CO sensor and no propane option, and the TT-30R is 120V, so it does not feed a 240V transfer switch. The Firman store sells a refurbished version at a deep discount with a 90-day warranty, which some owners choose.

3,000 W / 3,300 W surge · up to fridge, freezer and the essentials

running: 3,000 W

Best for RV and campsite users who want a remote-start 3 kW inverter from a US-based service team and will pay a premium over WEN.

Full spec sheet

~$1,280

Inverter Generator · Dual Fuel (Gas/Propane) · 58 dB

Firman WH03242

The dual fuel Whisper Hybrid, with electric start and Firman's CO Alert sensor. On gasoline it makes 3,200 running and 4,000 starting watts, and on propane 3,000 and 3,750, which covers a fridge, a furnace blower, lights and most RV air conditioners on a soft start. Quiet running at light load, the CO alert that shuts the engine down when carbon monoxide rises, and having a second fuel when gas lines are long are the points in its favor. Complaints are price, since at $1,280 it costs more than a WEN DF480iX with more watts, and weight: Firman lists 90 lbs, and some retailers list up to 111. The 58 dB is a quarter-load figure, and owners find it louder under load. The TT-30R is a 120V outlet that does not feed a transfer switch. It carries a 3-year warranty on new units, and service comes from Arizona.

3,200 W / 4,000 W surge · up to fridge, freezer and the essentials

running: 3,200 W

Best for Camp and short-outage users who want a dual fuel 3 kW inverter with CO shutdown and are willing to pay more than WEN charges.

Full spec sheet

~$1,400

Portable Generator · Dual Fuel (Gas/Propane) · 74 dB

Firman H08051 Dual Fuel 8000W

Firman's Hybrid-series 8,000 watt dual-fuel open frame belongs on the same shortlist as the Westinghouse and DuroMax units when you want a 50-amp outlet and a long run time. It makes 8,000 watts on gasoline and 7,250 on propane from a 439cc engine, with 10,000 and 9,050 starting watts, which carries a furnace, fridge, well pump and an AC through a manual transfer switch. The 8 gallon tank gives up to 12 hours at half load. The full panel draws praise: an L14-30R and 14-50R plus covered outlets, with a propane regulator and hose holder in the box. Compared with the H08052 sibling it has no CO alert listed, which is the main reason to pick the newer variant. At 212 lbs and 74 dB at quarter load it behaves like the other open frames in its class. Firman's list price is $1,400.

8,000 W / 10,000 W surge · up to well pump or a small central AC

running: 8,000 W
Transfer switch: transfer-switch ready

Best for Owners with a manual transfer switch who want a 50-amp dual-fuel generator without paying for CO shutdown or a bigger tank.

Full spec sheet Check price on Amazon