GENMAX builds generators for when the power grid fails you. The GM17000iETC is their heavy-duty answer, a tri-fuel inverter generator that swaps fuel sources based on what you have available. That flexibility is its core advantage, letting you run it on gasoline, a propane tank, or a natural gas line.

With 13,500 watts of running power, it can handle central air conditioning, a well pump, and kitchen appliances simultaneously. The inverter technology means it’s safe for sensitive electronics like laptops and flat-screen TVs. The digital display gives you a clear read on voltage, frequency, and hours remaining. At 210 pounds, it’s a substantial unit, but the included wheel kit makes positioning it straightforward.

The two-wire auto start integrates directly with a home transfer switch for true hands-off backup. Its CO detection sensor is a critical safety feature for any enclosed space. While quieter than many open-frame generators, expect a pronounced hum under full load—this is industrial-grade power, not a campsite companion. For whole-home backup or a demanding job site, it delivers serious, adaptable current.