Tri Fuel Inverter Portable Generator 12500/10000W Electric Start 120/240V Parallel Ready CO Alert
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$2,749.99at FIRMAN Power EquipmentChecked Nov 10
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The Firman WT12579 Mach 10 is a tri-fuel inverter generator that runs on gasoline, propane or natural gas. It produces 12,500 starting and 10,000 running watts at 120/240V from a 459cc engine, with a 7.1-gallon tank giving up to 16 hours at 25% load. Inverter output keeps sensitive electronics stable, and it is parallel-ready for up to 19,000 running watts with a second compatible unit. It suits home backup and job sites where fuel choice matters; rivals in this class usually offer two fuels, and tri-fuel flexibility plus CO shutdown are its main edges.
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The FIRMAN WT12579 Mach 10 is a tri-fuel portable inverter generator that runs on gasoline, propane (LPG) or natural gas (NG). It produces up to 12,500 starting watts and 10,000 running watts at 120/240V. A 459cc engine and 7.1-gallon fuel tank give up to 16 hours of runtime at 25% load.
Inverter power supports heavy-duty appliances and provides stable power for sensitive electronics. The control panel has GFCI-protected 5-20R household outlets, plus USB-A and USB-C connections. The generator is parallel capable: paired with another compatible unit, it can deliver up to 19,000 running watts combined.
It starts with an electric start and rolls on 9-inch flat-free wheels. A digital display shows voltage, power, frequency, total runtime and estimated runtime remaining. FIRMAN CO Alert technology automatically shuts the generator down if it detects unsafe carbon monoxide levels. Noise level is 69 dB at 25% load.
