Westinghouse WGen9500DF Dual Fuel Portable Generator 12500W

Overview

A dual-fuel portable generator producing 9500 running/12500 peak watts on gasoline or 8500 running/11200 peak watts on propane. Remote electric start and a 457cc Westinghouse OHV engine with a 6.6 gallon tank.

Dual-fuel flexibility is the headline feature: the same engine runs on gasoline or propane, which matters most for anyone stocking backup power where one fuel source might run short during an extended outage. Remote start via a key fob means starting the generator does not require walking out to a cold engine and pulling a recoil cord, though a recoil backup is included. The listed outlets include a 30A transfer-switch-ready receptacle and a 50A RV-ready receptacle, positioning this as a whole-home backup unit paired with a transfer switch rather than just a jobsite generator.

• 9500 running / 12500 peak watts (gas)
• 457cc Westinghouse OHV engine, cast iron sleeve
• Remote electric start with key fob
• 3-year limited service and parts coverage

Who it's for

Fits homeowners setting up whole-house backup power through a transfer switch, or RV owners who want a 120/240V 50A connection. Less suited to anyone who only needs a small, quiet unit for camping or light tool use.

Pros and cons

Performance notes

Built around a 457cc Westinghouse OHV engine with a cast iron sleeve, the unit is rated for extended duty: up to 12 hours of runtime on a 6.6 gallon gasoline tank at moderate load, with output dropping somewhat on propane (8500 running watts versus 9500 on gas). Automatic low oil shutdown and a digital hour meter with a VFT display for voltage, frequency and lifetime hours are built in to protect the engine and track maintenance intervals. Two GFCI-protected household outlets plus the 30A transfer-switch and 50A RV receptacles are what let it serve as either whole-home backup or RV power, depending on which outlet you use.

Where it stands among generators

• 12 hours runtime: longer than 73% of the generators we list.

From the specs of the 84 generators we list; not a test result.

Specifications

Closest rivals on specs

Cummins Onan P4500i Portable Inverter Generator

• Runtime 12 vs 18 hours (-33%)

Honda EB5000 Portable Generator 5000W

• Output Wattage 9500 vs 7000 watts (+36%)
• Running Wattage 9500 vs 5000 watts (+90%)
• Runtime 12 vs 10 hours (+20%)

GENMAX GM6000XiE Open Frame Inverter Generator 6000W

• Item Weight 210 vs 115.7 pounds (+82%)
• Output Wattage 9500 vs 6000 watts (+58%)
• Running Wattage 9500 vs 5250 watts (+81%)