Skip to content
PRICE DEMOLITION SALE: Hundreds of Job-Crushing Deals. Shop Now >
Northern Tool Equipment Logo TextNorthern Tool Equipment Logo text link to Home.

Free Gift Card on All Orders Over $100 See Details

Extended - Last Chance!

Free Gift Card Details

$100 Order

$10
gift card

$250 Order

$25
gift card

$500 Order

$50
gift card

$1000 Order

$100
gift card
  • The promotion will be automatically applied on the Shopping Cart page.
  • To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
  • Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
  • E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
  • Free e-gift cards expire 11/01/26.
  • Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
  • Valid online and in participating retail stores.
  • Limited-time offer. Subject to change without notice.
Print

Generac Guardian Liquid-Cooled Standby Generator — 25 kW, Model# QT02515ANSX

Item# 167111
Generac Guardian Liquid-Cooled Standby Generator — 25 kW, Model# QT02515ANSX

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Generac Guardian Liquid-Cooled Standby Generator — 25 kW, Model# QT02515ANSX

Click or Tap image to Zoom

  • Steel enclosure in Bisque
  • In-line 4-cylinder engine
  • Automatic safety shutdowns and exerciser
  • Safe design
    Standby generators require installation involving permanent outdoor placement, electrical wiring and fuel source connections. We recommend the use of a trained professional for final connections of gas and electric.
    Generator sales are final.

See full description

  • Description

  • Key Specs

  • Reviews

  • Q & A

  • Accessories

  • Warranty

  • Compare

Product Summary

Higher wattage requirements need larger generators. Generac Guardian® Series liquid-cooled models provide whole house backup power and are available for larger residential and light commercial applications. Models run on natural gas or LP gas. Requires Smart Switch or RTS transfer switch (sold separately). UL listed. U.S.A. Not for sale in California. Not intended for use as primary power in place of utility or in life-support applications. Read the owner's manual in its entirety before using this product.

What's Included

  • (1) Standby generator, Model# QT02515ANSX

Downloads

Product Manual

Features + Benefits

  • Steel enclosure in Bisque
  • In-line 4-cylinder engine
  • Automatic safety shutdowns and exerciser
  • Safe design
    Standby generators require installation involving permanent outdoor placement, electrical wiring and fuel source connections. We recommend the use of a trained professional for final connections of gas and electric.
    Generator sales are final.

Key Specs

AttributeSpecification

item#

167111

Brand

Generac

Manufacturer's Warranty

24 months parts / 12 months labor

Ship Weight

925.0 LB

Voltage

120/240

Rated Kilowatts LP

25

Rated Kilowatts NG

25

Max. Amps

104.2

Fuel Type

Multi-Fuel
AttributeSpecification

Engine Displacement

1,600 cc

Noise Level

74 dB

Enclosure Material

Steel

Battery Required

Yes

Battery Included

No

Auto Shutdown

Yes

Engine Cooling

Liquid

Dimensions L x W x H (in.)

62.2 x 29 x 33.5 in

Reviews

Questions & Answers

10 Reviews This action will navigate to reviews.

Questions

1–5 of 5 Questions  
Sort by:

  1. What about the RPM?

    1. The rpm on this generator is 3600 RPM.

      Helpful?

    2. Generac’s 25kw Liquid Cooled automatic standby generator, model number QT02515ANSX, features an in line Generac engine, which will operate continuously at 3600 RPM.

      Helpful?

  2. Fuel Burn at 50% load

    What is the fuel burn on this unit at 50% load?

    1. The unit operating at half load while utilizing natural gas will need 297,000 BTU/hr, and while utilizing liquid propane will need 299,880 BTU/hr.

      Helpful?

    2. The volume and pressure required for the 25kW unit operating at full load utilizing natural gas is 430,000 BTU/hr with 5-14” water column, and while utilizing liquid propane is 443,440 BTU/hr with 5-14” of water column. The fuel consumption will decrease as the load decreases; the unit operating at half load while utilizing natural gas will need 297,000 BTU/hr, and while utilizing liquid propane will need 299,880 BTU/hr.

      Helpful?

  3. will this generator handle running ac in the summer?

    need to know for my mother, she has a lot of health issues and i need a generator that will handle everything for her

    1. This generator is rated for a continuous output of 25,000 watts and 104 amps. The wattage and amperage requirements can be found on the data plate of the appliance you intend to run. Please keep in mind that the starting amperage requirement of the appliance will be higher than the running amperage and must not exceed the rating of the generator.

      Helpful?

    2. This unit is rated for a continuous output of 25,000 watts and 104 amps. Wattage and amperage requirements can be found on the data plate of the appliance you intend to run. Keep in mind that the starting amperage requirement of the appliance will be higher than the running amperage and must not exceed the rating of the generator.

      Helpful?

  4. how big a propane tank do you need for this unit to run at half load for 10 days?

    1 answer

    1. The minimum tank size required for this generator would be a 250 gallon tank. We recommend installation by a qualified technician. You would also need to check or local codes for installation.

      Helpful?

  5. Fuel Burn

    What is the fuel consumption rate on the unit?

    1 answer

    1. The fuel consumption at full load using propane is 4.3 gallons per hour.

      The fuel consumption at full load using natural gas is 390 cubic feet per hr.

      Helpful?

Accessories We Recommend

This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.

See All Ear Plugs + Dispensers
3M Reusable Corded Earplugs, NRR 25dB, Model# 90586-80000
3.8 out of 5 stars. 13 reviews

3M Reusable Corded Earplugs, NRR 25dB, Model# 90586-80000

Item # 174630

$2.99
See All Frameless Safety Glasses
3M Virtua Protective Safety Glasses, Clear Lens, Model# 11228-00000-100
4.6 out of 5 stars. 79 reviews

3M Virtua Protective Safety Glasses, Clear Lens, Model# 11228-00000-100

Item # 547021

$1.99
Reg $4.99Save 60%

Order today to get this price.

Warranty

Manufacturer's Warranty

24 months parts / 12 months labor

Extend Your Warranty Coverage with a Northern Protection Plan (NPP)

Replacement Plan — 1 Year

A Northern Protection Plan is available after adding the product to your shopping cart.