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  • Guardian Ultra Source 12,500-Watt 26 HP Portable Generator 04451 (Discontinued by Manufacturer)
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Guardian Ultra Source 12,500-Watt 26 HP Portable Generator 04451 (Discontinued by Manufacturer)

by Generac

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  • 12,500-watt portable generator with industrial-grade design for heavy-duty home or commercial use
  • 150% surge capacity to 18,750 watts; run-time up to 10 hours at half load
  • Air-cooled 26 HP 760 cc V-twin overhead valve industrial engine; 16-gallon tank
  • Includes electric start, electronic governor, starting battery, and pneumatic wheel kit
  • Non-CARB Compliant/Not For Sale In California
This item’s packaging will be visible when delivered and cannot be gift-wrapped.

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Product Description

Product Description

Includes Battery, Engine Oil, Instruction Sheets

Amazon.com

The Generac Guardian Ultra Source 12,500-watt portable generator is an industrial-grade machine intended for use in the home, on the job-site, or anywhere heavy-duty use and maximum horsepower are required. It is built with a powerful 26 HP 760 cc OHVI V-twin overhead valve industrial engine that is air-cooled, quiet, and efficient; the engine system also features full-pressure lubrication and automatic idle control to protect the engine and save fuel. The 150-percent surge capacity to 18,750 watts offers extra motor-starting capability, and the large 16-gallon fuel tank allows for an extended run-time of up to 10 hours at half load. This generator includes GFCI protected outlets and a full power 50 Amp (NEMA 14-50) outlet. This product comes with an electric start, an electronic governor, and a starting battery; it also includes a pneumatic wheel kit for easy portability. It measures 48-1/2-by-30-3/4-by-38-1/2 inches (LxWxH), weighs 410 pounds, and is backed by a 2-year warranty.

Product Details

Product Manual [3.97mb PDF]
  • Product Dimensions: 48.5 x 30.8 x 38.5 inches ; 410 pounds
  • Shipping Weight: 426.4 pounds
  • Domestic Shipping: This item is available for shipping in the U.S. except for California and to select countries outside the U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B000068LAA
  • California residents: Click here for Proposition 65 warning.
  • Item model number: 04451
  • Average Customer Review: 3.3 out of 5 stars  See all reviews (3 customer reviews)
  • Amazon Best Sellers Rank: #556,412 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
  • Product Warranty: For warranty information about this product, please click here
  • Discontinued by manufacturer: Yes

Customer Questions & Answers

Customer Reviews

3.3 out of 5 stars
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Most Helpful Customer Reviews

5 of 5 people found the following review helpful By JP on May 29, 2006
Verified Purchase
I have only tested the unit using a very light load but it seems to work very well. The auto idle feature kicks in instantly when a load is presented. The unit does have a tendancy to idle up & down slightly when no load is present but runs smoothly when a given a load. It is very quiet when running (compared to other 5kw generators). I am converting my unit to run tri-fuel ($397 extra from USCarbs.com) since this thing can guzzle gas like an SUV at full load and after Katrina hit, gasoline was being rationed out at $20 a visit. With a 16 gallon tank $20 will only fill it to half a tank. I also opted to interface my generator with a manual transfer switch which allows me a little more flexability than the automatic transfer switch and cheaper installation. There's several electrical outlets and wiring options on the generator panel. I don't give the unit 5 stars since a true Gaurdian phone customer service/tech support doesn't seem to exist. If it needs service you must contact an authorized Generac/Gaurdian dealer in your area for service and 99.9% of the time if you did not buy the unit from them they are reluctant to help. At best you may opt to have an authorized dealer install your transfer switch which may obligate them to help you if your generator requires servicing.
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Bad product . . . do not buy. Bad customer support by Generac. I purchased this unit brand new in September, 2011 to replace a 20 year old unit. It worked fine initially. We properly ran the unit or prepped it for long term storage as required in the owners manual. The unit has between 10-15 hours on it. In November, 2014 I prepped it from long term storage to get it running for the winter and it would not start. I had the carbuerator cleaned out, new oil, filter, etc by a authorized repair shop. They got it running but it would only run for 10 minutes. Generac had them replace the oil pressure switch and it ran. I went to run it two weeks later and, while it started, it would only run for 6 minutes then cut out. Repair shop came and checked the unit again. Generac recommended and oil pressure test which showed it ran well below normal specs and they recommended to replace the entire engine at a cost to me of $1500!
I paid $1800 for the unit initially, another $300 in repairs and now $1500 for a new engine - for that price I could have installed an entire whole house stand by system.
I contacted Generac to ask for some assistance and they completely shot me down. Extremely disappointed and upset with this product as I am stuck with a large repair bill, which I cannot afford, and a unit that does not work!!!
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3 of 4 people found the following review helpful By Charles Ware Sr. on October 7, 2005
I would reccomend this generator to anyone as it performed flawless for three and a half day of use while I had no power.
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