Guardian Series 11kw


Product Description

Generac’s model’s 6437,6438 & 6439 standby generators produces up to 11 kilowatts of standby power for your home during a power outage. The standby generator is a permanent installation that works with an automatic transfer switch (sold separately) to start and run without operator intervention whenever power from the electric utility is interrupted, offering 24/7 protection against power outages, even when you are away from home.

Fuel Choices

Generac standby generators leave the factory ready to run on natural gas, but convert quickly and easily to LP gas (propane) during installation. The 11kw produces a full 11,000 watts of power when running on LP gas and 10,000 watts on natural gas. Fuel consumption on any generator is directly related to the electrical load and changes continuously. At half load, the generator consumes about 1.2 gallons of LP gas per hour, or 124 cubic feet of natural gas per hour.


Generac’s commitment to reliable standby power begins with its overhead valve industrial engine, the only generator engine in its class designed specifically for use in a generator. The GH-530, electronic-ignition engine turns at 3600 RPM to deliver up to 18 horsepower. The 2 year or 200 hour interval between oil, filter, and plug changes provide for extended operation during long-term power outages. The oil system is fully pressurized for superior lubrication and cylinder rigidity is improved by the cast iron spiny-lok construction for long-lasting service and performance.

Evolution Controls

The Evolution Controller by Generac monitors the utility electric service. If the service drops or sags below an acceptable level, the controller starts the generator and signals the automatic transfer switch to move the home onto generator power. When the utility service returns, the controller reverses the process, runs the generator for a cool-down period, and then shuts it down. During operation it continuously monitors and controls engine speed and regulates the voltage output for utility grade power to operate even sensitive electronics and computers.

Also featured in the controller is a programmable exercise period to keep the generator lubricated and ready for operation at all times. The smart battery charger maintains the battery charge level and notifies the homeowner of imminent battery failures. The dealer programmable 2 to 1500 second start delay prevents false starts during momentary power outages. Other features include maintenance alerts and advanced fault detection and reporting.

Mobile Link is an optional accessory that provides alerts sent as text messages to your phone, and allows you to access your generator’s controller via dashboard on computers, tablets, and smart phones from any Internet connection. Basic and advanced wireless monitors (also optional) install inside your home. The basic unit provides generator status, while the advanced model allows you to test the generator, receive status alerts, and control functions such programming exercise periods.

Generator Unit

The generator produces electricity with an advanced alternator that utilizes a revolving magnetic field and skewed stators. The design eliminates the need for brushes and provides better voltage and frequency regulation for superior quality power and greater surge capacity for starting heavy-duty motors. Better surge capacity allows air conditioner and other appliance motors to start with a momentary boost of power to get them turning.

Appearance and Noise

The 11kw standby generator fits into any neighborhood with a pleasing design and a 63db noise level that is lower than most central air conditioners. The unit is 48 inches wide, 25 inches deep, and 29 inches high with an all steel enclosure that resists corrosion, even in all climates, and meets fire protection standards. The hinged lid provides easy access to generator for maintenance and locks to prevent tampering

Provides essential circuit power protection for your home, ensuring the necessities remain powered during an outage. The most affordable automatic standby generator on the market offers protection for half the cost of central air conditioning.

Easiest installation on the market and an excellent value when purchased pre-packaged with a pre-wired transfer switch, or customize your system by purchasing the generator and transfer switch separately. Composite pad is included, eliminating the need to pour a concrete base.

Simple field conversion from LP to natural gas.

Generac’s OHVI™ engine was designed specifically for generators. It outruns competitive generator engines with an engine life that is three to four times longer and has a significantly longer period between scheduled maintenance checkups.

Sturdy, galvanneal steel enclosure with RhinoCoat™ finish for superior weather protection.

Electronic Controller and user-friendly LED display and controls for programmable diagnostics and information at-a-glance. Sophisticated codes alert you to generator status at all times.

Added Sound Reduction with enclosures that are lined with sound reducing foam panels for further noise reduction.

True Power™ Electrical Technology

Two Line LCD Multilingual Digital Evolution™ Controller (English/Spanish/French /Portuguese)

Two Transfer Switch Options Available: 50 Amp Pre-Wired Switch or 200 Amp Smart Switch. See Page 4 of Spec Sheet for Details

Electronic Governor

External Main Circuit Breaker, System Status & Maintenance Interval LED Indicators

Sound Attenuated Enclosure

Flexible Fuel Line Connector

Composite Mounting Pad

Natural Gas or LP Gas Operation

5 Year Limited Warranty

Capability to be installed within 18″ of a building*




Models 006437-0, 006438-0, 006439-0 (Steel – Bisque)
11 kW 60Hz



Install Guidelines


Quick Support ?Quick Support ?
Do you need quick support ?

Enter a question and you will receive an answer shortly...

* required
Send Message