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Home Use Generators : (Generac Guardian) 25 kW Steel 1-Phase

…Liquid Cooling, Steel Enclosure

This standby generator is best suited for: 1)large to extra-large homes (we recommend range of 4900 to 6500 square feet); 2)small to medium-sized home-based or similar businesses (that use single-phase electricity).

The 25 kW Guardian home use generators unit from Generac comes factory-configured to burn natural gas, however is easily modified for propane operation. This sort of flexibility is one of QT025's most attractive features - it means a minimum amount of hassle should homeowner ever wish to change fuel sources. Flexibility can be worth a pot of gold in an emergency. With this single-phase home use generators model, you should be able to run central AC or electric heat, plenty of appliances, and lighting in all key areas of home (depending on application size). Home use generators unit, QT025, will provide whole-house backup to area of 2000 or so square feet, with some applications performing better. Unit must be operated with transfer equipment - and, for best results, consider one of Generac's own RTS automatic transfer switch models (see Switch Options tab), designed for compatibility with Guardian-Series home use generators machines. This home use
generators model is CARB approved, available to California residents.

  • Important: Please see the shipping tab for information regarding the liftgate shipping option and residential versus commercial deliveries.

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    Model:  QT02515-1
    Price:  $8,329.00
    Available Options:
    Residential Shipment?:

    Model Specs

    Manufacturer: Generac
    Model #: QT02516A
    Color: White
    Enclosure: Steel
    Engine Make: Generac
    Transfer Switch Included?: No
    Price: $8,329.00

    Rated Power (Natural Gas): 25 kW
    Rated Power (Liquid Propane): 25 kW
    Phase: 1
    Frequency: 60 Hz
    Voltage: 120/240
    Rated Amps: 104
    Rotor Poles: NA
    Mainline Circuit Breaker: 125 Amps

    Engine Type: Inline 4-Cylinder
    Intake Method: Carburetor
    Cylinder Block: NA
    HP/L: NA/1.6
    Number of Cylinders: 4
    Compression Ratio: 9.75:1
    Lubrication Method: Pressurized
    Valve Arrangement: Overhead
    Engine Cooling: Liquid
    Engine rpm: 3600
    Fan Type: Belt Driven
    Governor System: Electronic
    Ignition System: Electronic
    Starter Voltage (DC): 12
    Battery Required (Volts/Cold-Cranking Amps): 12/525 (Included)
    Startup Delay (After Power Interruption): Programmable (10-30 Seconds)
    Engine Warm-Up Duration: 5 Seconds
    Engine Cool-Down Period: 1 Minute
    Fuel Type: Natural Gas(NG)/Liquid Propane(LP)
    Fuel Consumption (NG @ Exercise): 60 Cubic Feet/Hour
    Fuel Consumption (NG @ 25% Load): 120 Cubic Feet/Hour
    Fuel Consumption (NG @ 50% Load): 220 Cubic Feet/Hour
    Fuel Consumption (NG @ 75% Load): 310 Cubic Feet/Hour
    Fuel Consumption (NG @ Full Load): 390 Cubic Feet/Hour
    Fuel Consumption (LP @ Exercise): 0.7 Gallons/Hour
    Fuel Consumption (LP @ 25% Load): 1.3 Gallons/Hour
    Fuel Consumption (LP @ 50% Load): 2.4 Gallons/Hour
    Fuel Consumption (LP @ 75% Load): 3.4 Gallons/Hour
    Fuel Consumption (LP @ Full Load):4.3 Gallons/Hour

    Convenience Features
    Automatic Voltage Regulation: Yes
    Low-Voltage Shutdown: Yes
    High-Voltage Shutdown: Yes
    Low-Oil Shutdown: Yes
    Overspeed Shutdown: Yes
    High-Temperature Shutdown: Yes
    Starter-Overcrank Protection: Yes
    Low-Battery Protection: Yes
    Built-In Battery Charging Capability: Yes
    UL Listed: Yes
    External-Fault Capability: Yes
    Internal-Fault Protection: Yes
    Incorrect-Wiring Protection: Yes
    Mainline Circuit-Breaker Protection: Yes
    Safety Fusing: Yes

    Weight: 875 lbs
    Dimensions (Inches): 62.2L x 28.98W x 33.5H
    Decibels (@ Exercise - 7 Meters): 62
    Decibels (@ Full Load - 7 Meters): 72
    Compliance: 50-State US

    Additional Features
    Delivered factory setup to operate on natural gas (NG)
    Can be easily transfigured to run on liquid propane (LP)
    Generator-protecting incorrect wiring feature prevents unit operating if errors detected
    Spin-on automative-type oil filter
    Quietest test (exercise) mode in the standby-generator industry
    Galvannealed-steel housings coated with trademarked Rhinocoat finish for enhanced durability
    Factory-tested for motor-starting capacity


  • 2-year manufacturer's limited warranty

  • Shipping

    The T-REX Free Shipping Pledge:
    The manufacturers we work with are large concerns that ship multiple items each day. This enables them to attain the best shipping rates available. T-REX passes these savings on to our customers by providing free shipping to any commercial or residential address in the continental United States. This is the T-REX pledge. We will adhere to it even when a freight carrier adds one-time or unanticipated shipping fees. Try obtaining these terms from another Internet-based generator seller. You will not find a more customer-friendly policy than ours.

    About Lift Gates:
    Typical delivery trucks are designed to be unloaded at docks, or by forklifts. In other words, they are designed to deliver to commercial locations where such options are available. By contrast, a lift gate-equipped truck lowers heavy items from the truck trailer (which can be several feet high) to the ground, using a hydraulic mechanism similar to an elevator. If your delivery will go to an address not equipped with a loading dock, and you don't have access to a forklift, then selecting the lift-gate delivery option is a convenient alternative.

    A generator from T-REX can weigh hundreds of pounds. Without access to a loading dock or forklift, unloading one safely may require several able-bodied individuals. Delivery drivers are NOT required by their companies to help customers unload. Unless you are certain that a sufficient number of helpers will be available during the delivery, we urge you to specify the lift-gate shipping option before checking out. Charge for the lift-gate is $75.00, and is NOT included in the Free-Shipping Pledge offered by T-REX. We feel, however, that it is worth the investment.

    Residential Delivery:
    You need to inform us if your delivery will be going to a residential address. Freight companies need to know this because many residential areas can't be serviced by large semi trucks. The generator will instead be loaded onto a smaller truck tailored to home deliveries. A home which serves as a place of business (regardless of the presence of company name/signage), if located in a residential area, is still considered a residential address for shipping purposes. Please select the residential delivery option if applicable. T-REX agrees to pay all additional residential delivery costs, but to do so, we must be properly informed before shipping arrangements are made.

    To select your choice of residential or commercial delivery, please see the purchase options in the Add To Cart area.


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    T-Rex Generators distributes products from many different standby and portable generator manufacturers at substantially discounted prices. These represented companies include: Asco automatic transfer switches, Briggs & Stratton generators, Winco generators, Generac Generators, GenTran transfer switches, Reliance Controls Transfer Switches, and Zenith automatic transfer switches. T-Rex also carries Honda powered generators which have the same time-tested Honda engines as the substantially more expensive Honda generator brand units.