Generac 25,000-Watt Liquid Cooled Standby Generator-QT02515ANSX - The Home Depot


Model # QT02515ANSX

Internet # 203218339

25,000-Watt Liquid Cooled Standby Generator

Generac 25,000-Watt Liquid Cooled Standby Generator

This item has been discontinued.
The Home Depot no longer carries this specific product.

$8,499.00 / each


Model # QT02515ANSX

Internet # 203218339

Store SO SKU # 1000033119

The experts in home standby generators present the Generac Guardian Series 25kW standby generator. Driven by the reliable, increased horsepower of a Generac 1.5L automotive-style, liquid-cooled engine, the 25kW Guardian Series can provide automatic whole-house protection for larger homes, or essential circuit protection for small and medium businesses such as convenience stores, restaurants, and offices. Choose from a variety of transfer switches to meet any need, including the Nexus Smart Switch. Engineered with Generac’s Digital Load Management (DLM) technology as standard equipment, the Nexus Smart Switch allows for more coverage with a smaller generator through smart load management. The Guardian Series is America’s #1 selling family of home standby generators. They run on your existing natural gas or LP fuel supply, and kick in automatically within 10 seconds of determining utility power failure. UL/CUL Listed. This item cannot be returned.

  • Patented, quiettest mode is a neighborhood-friendly self-test that runs quieter, uses less fuel, and emits fewer emissions than other brands, and you can schedule whenever you choose with user friendly digital controls
  • Generac's nexus controller is the most comprehensive available, with a dual line, tri-lingual LCD display for easy monitoring and management of generator functions, including runtime and maintenance intervals
  • Sturdy galvanneal steel enclosure with RhinoCoat paint finish delivers superior weather protection
  • Engine runs on your home’s existing natural gas or LP fuel supply for continuous, worry-free operation, flexible fuel line included
  • Transfer switch and battery(group 26, 12 Volts and 525 CCA minimum) must be purchased separately
  • Click on the “More Info” tab to download the specifications pdf to view the refer a friend rebate for the $50 savings
  • Allow 30 days shipping
  • Crane Required for Delivery

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Assembled Depth (in.)  27.87 in  Assembled Height (in.)  33.5 in 
Assembled Width (in.)  62.2 in  Height (in.)  33.5 
Product Height (in.)  33.5  Product Length (in.)  62.2 
Product Width (in.)  27.87  Width  27.87 
CA (CARB) Compliant  Not CARB Compliant  Color Family  Gray 
Commercial / Residential  Commercial / Residential  Continuous Wattage  25000 
Engine Displacement (cc)  1.5  Engine Make  OEM Branded 
Engine manufacturer  Generac  Hour Meter  Yes 
Low oil shutdown  Yes  Operational volume (dB)  72 
Product Weight (lb.)  397 lb  Remote Monitoring  Sold Separately 
Response time (sec.)  20  Returnable  Non-Returnable 
UL Listing  1-UL Listed 
Warranty / Certifications
Certifications and Listings  1-UL Listed,CSA Listed  ENERGY STAR Certified  No 
Manufacturer Warranty  2 years limited 


Rated 4.6 out of 5 by 9 reviewers.
Rated 5.0 out of 5.0 by invaluable! We have had our propane 25kw generac for 12 years now. Many storms, power outages and general electrical problems and our unit never gave us cause for concern. One of the best investments for our house we ever made. The unit is quiet compact and sturdy. Change the oil air filter oil filter plugs and you are good to go! Great job GENERAC! We are building a new home and it will be another GENERAC GENERATOR for us.frankiebabe March 14, 2015
Rated 4.0 out of 5.0 by can't truly rate this yet but i did I have a 36kw guardian series generac. we had a number of power outages here in southwest Oregon due to weather bringing down power lines to drunks hitting power poles. one time the power was out for 8 days and we were freezing our butts off since it was winter. when the power finally was restored the inhouse temp was 40 degrees f. so last year I decided to to get a generator to power the whole house since all we have here is electrical power. wouldn't you know it we haven't had a power outage in over a year. I do feel secure though in the knowledge I have a great alternative to keep us somfy when the power does go out which will be inevitable. May 23, 2014
Rated 5.0 out of 5.0 by Our Generac gives us security and peace of mind in all kinds of wild weather. We've had our Generac for just about a year. It has served us well through a few small power failures, Hurricane Irene and the freak snowstorm on the East Coast on October 29, when our neighborhood was without power for eight long days. It tests itself once a week. It goes on automatically when the power fails and enables our family to live our normal lives--hot showers, hot meals, lights and television. I can even run the dishwasher and washing machine with no problem. I cannot recommend this product enough in these days of wild, extreme weather! November 22, 2011
Rated 5.0 out of 5.0 by Excellent product I have owned this 25kw generac generator since 3/30/2006. We have lost power many times since installation, mainly due to hurricaines. My generator has worked great. we do our entire house. Our only problem has been rusting of the exterior shell and I am now looking for an aluminum enclosure. April 2, 2013
Rated 3.0 out of 5.0 by Had problem with this unit. I purchased this unit new 3/1/11, and had to have the engine replaced at 21.9 hrs. after it blew two oil filters on 10/26/11. I had to go through a lenghty new oil pump replacement , relief spring replacement process before a new engine was ordered, delvered and finally it was installed 12/2/11. Generac started my warranty over, and the unit has self tested three times since this date. Working fine now. I bought an extended warranty also just in case. December 26, 2011
Rated 5.0 out of 5.0 by Now I don't worry when I leave town. We live eight miles north of the nearest town and the high winds cause trees to fall on the power lines often. Since we have a well, when there is no power we have no water. Last year we had our whole house generator installed and now have 'peace of mind'. The unit does the weekly self test, is quiet and never fails to kick in when the power goes out. I wish I would have been able to talk my wife into this many years ago. November 22, 2011
Rated 5.0 out of 5.0 by Product is self sufficient Product runs on a weekly test schedule that is unobtrusive and lists any problems it may have found with the unit. Recently we had a hurricane and it automatically turned on while the power was out for 5 days. We had evacuated, but readouts tell us that it ran steadily for about 3 1/2 days continuously and provided power that kept all our refrigerators up and running. We are very pleased with the item! October 6, 2011
Rated 4.0 out of 5.0 by HAD UNIT REPLACED My new engine from 12/2/11 failed,1.6 Chery Generac replaced entire unit with 1.5 Mistsu engine on 10/23/12. Hope it works as well as it sounds. Company stood behind warranty after two tries to fix. November 19, 2012
  • 2015-04-17T10:15:00.095-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co-hasreviews, tv_9, tr_9
  • loc_en_US, sid_203218339, prod, sort_default
2 >>


Curbside Truck Shipping (By Appointment) includes delivery to receiving area/dock for businesses or curbside for residential orders. The carrier will contact you to make a delivery appointment with a 4 hour window once the items have arrived at the local hub in your area. Delivery appointments are required.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.