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Home Generators (Generac Guardian 8 kW): Standby 1-Phase

…Air Cooled; Pressurized Lubrication

This standby generator is best suited for: 1)small to medium-sized homes (recommendation is applications 1200 - 1600 square feet); 2)small or home-based businesses (that require single-phase electricity).

The 8 kW Guardian home generators unit by Generac is a good backup for a 1500 to 2000 square-foot application. The 8 kW Guardian home generators model can be prepped on the ground to employ either natural gas or propane fuel. Manufacturer claims enough starting power for a 2-ton central AC unit. Should also operate from one to five large appliances simultaneously, with some applications performing better. Don't expect this home generators model to run your central electric heat, or an entire residence. Is available with Generac's revolutionary 200-amp load-shedding transfer switch - which can be a great way to maximize generator capacity. Here is how it works: home circuits are prioritized so that those most critical to you are always powered first. Any time that excess home generators capacity exists, less significant circuits are activated one by one. If more power is required by a priority circuit, these lower-tier circuits are deactivated in reverse order. The load-shedding switch can help your standby generator perform like a model with up to 20% larger kilowatt rating. This home
generators model CARB approved, available to California residents.

  • Important: See the shipping tab for information regarding our liftgate option, and residential versus commercial deliveries. At present, because T-Rex is shipping Generac products direct from the company's Wisconsin-based factory, any
  • residential delivery weighing in excess of 80 lbs will require the $75.00 liftgate shipping option. Shipments to commercial addresses (non-residences) remain exempt from these charges unless specified by customer.

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    Model:  6245-1
    Price:  $2,187.00
    Available Options:
    Type Delivery Preferred:

    Model Specs

    Manufacturer: Generac Guardian
    Model #: 6245
    Color: White
    Enclosure: Steel
    Engine Make: Generac Home Generators
    Transfer Switch Included?: No
    Price: $2,187.00

    Rated Power (Natural Gas): 7000 Watts
    Rated Power (Liquid Propane): 8000 Watts
    Phase: 1
    Frequency: 60 Hz
    Voltage: 120/240
    Rated Amps: 29.2(NG)/33.3(LP)
    Rotor Poles: 2
    Mainline Circuit Breaker: 35 Amps

    Home Generators Motor/Performance
    Engine Type: OHVI™ 1-Cylinder
    Intake Method: Carburetor
    Cylinder Block: Aluminum
    HP/cc: NA/410
    Number of Cylinders: 1
    Compression Ratio: 9.4:1
    Lubrication Method: Pressurized
    Valve Arrangement: Overhead
    Engine Cooling: Air
    Engine rpm: 3600
    Fan Type: NA
    Governor System: Electronic
    Ignition System: Electronic
    Starter Voltage (DC): 12
    Battery Required (Volts/Cold-Cranking Amps): 12/350 (Not 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 @ 50% Load): 77 Cubic Feet/Hour
    Fuel Consumption (NG @ Full Load): 139 Cubic Feet/Hour
    Fuel Consumption (LP @ 50% Load): .94 Gallons/Hour
    Fuel Consumption (LP @ Full Load): 1.68 Gallons/Hour

    Home Generators 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: 340 lbs
    Dimensions (Inches): 47.9L x 25.3W x 28.8H
    Decibels (@ Full Load - 7 Meters): 62
    Compliance: 50-State US

    Additional Features
    1-cylinder Generac OHV motor with pressurized lubrication
    Automatic cooldown one minute
    External mainline circuit breaker
    Automatic voltage regulation maintains electrical output to +/-1%
    Motor employs trademarked OHVI technology; boasts 2-year/200-hour oil change period
    Standard steel enclosure and composite mounting pad
    Enclosure has lockable lift-up roof, pull-out front for simple maintenance access


  • 3-year manufacturer's limited warranty

  • Shipping

    NOTE: all Generac residential shipments weighing in excess of 80 lbs require our $75.00 liftgate shipping charge (by Generac policy). Liftgate service is optional for commercial deliveries. This policy change does not apply to shipments from other manufacturers.

    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.