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Generac 6437 11,000 Watt Review

generac 11000 watt

The Generac 6437 11,000 Watt Guardian Series residential backup generator provides the automatic backup power you need to protect your home and family during a power outage. It is connected to your existing liquid propane gas or natural gas supply and it kicks in within seconds of determining power loss automatically and runs for as long as necessary until utility power returns.


  • Unit runs on natural gas or liquid propane and features hands-free operation with no fueling, no manual start and no extension cords
  • Clean, smooth True Power Technology provides safe operation of sensitive electronics
  • Includes automatic transfer switch with 12-circuits protected (NEMA 1, indoor rated only)
  • 11,000 rated watts and this model is UL, CUL and EPA Compliant for safety
  • Comes with a 2-year limited warranty and is CARB Compliant


The GH-530 is an 18-horsepower, overhead-valve industrial engine designed specifically for use in its generators. The electronic ignition engine runs at constant 3600 RPM for clean, smooth electrical output from the generating unit. Features like 'Spiny-Lok' cast iron cylinder walls for extra rigidity, a pressurized lubrication system outages with minimal maintenance and exceptional reliability.

Evolution Controller

The Evolution Controller handles most of the Generac 11kw generator’s functions, including starting, stopping, and exercising the generator. It senses a power outage, starts the generator and signals the transfer switch to switch the house onto standby generator power. While the generator is operating, the Evolution monitors the voltage level and frequency and adjusts it to maintain utility-quality power. Once power is restored and the house is moved back onto utility power, it allows the generator engine to run during a cool-down period and then shuts it down.

Automatic Transfer Switch

The automatic transfer switch has two pre-wired conduits, one to connect directly to the main service panel and the other to the standby generator, 50 amp transfer switch and load centre with 12 circuit breaker positions. When utility power is interrupted, the transfer switch receives a signal from the Evolution Controller and switches the load centre from utility power to generator power to supply your selected critical circuits with power until utility power is restored.


  • It is durable and sturdy
  • Easy to use


  • It is too heavy
  • It has limited instructions


The Generac 11kW generator with 50A 12-circuit Transfer Switch can keep your family safe and secure even if your power is not restored for days or weeks. The most important feature is, all-weather steel enclosure is able to withstand winds of up to 150 mph and other extreme weathers. In areas with low natural gas pressure, the standby generator can operate on natural gas pressures of only 3.5" of water column. The power produced by the residential backup generator has a clean energy signature with less than 5-percent harmonic distortion, which makes it ideal for powering your sensitive electronics and appliances.

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