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Guardian Ultra Source 15,000 Watt Electric Start Generator

(Based on expert analysis, manufacturer ratings and customer reviews)
4.7 out of 54.7 out of 54.7 out of 54.7 out of 54.7 out of 5
19 Reviews
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  • Features
  • Specs
  • 1
    Q&A 
  • 19
    Reviews
  • Articles
  • Shipping
  • Accessories

Grade

Style
Run Watts
15,000
Rated Watts
Surge Watts
22,500
Starting Watts
Fuel
Engine
Need Help? Ask Our Generator Experts.
22,500 Surge Watts
Powerful enough to start a four ton A/C unit

Electric Start
Starts with a simple press of a button

Automatic Idle Control
Reduces noise, increase fuel efficiency and extends life

Full Pressure Lubrication
Eliminates wear during startup and extends life

16-Gallon Gas Tank
Generates up to 10 hours of electricity at half load

Portablility Kit
Includes 13" all terrain tires and heavy-duty lifting eye


Model
  Model Number:4582
 Manufacturer:Guardian UltraSource
 Made in USA:Yes
Engine
 Brand:Generac
 Starting System:12-Volt Button Start
 HP/CC:30 HP/992 cc
 Consumer Engine Warranty:2 Years
 Commercial Engine Warranty:1 Year
 Engine RPM:3600 RPM
 Low Oil Alert/Shutdown:Yes
 Cast Iron Sleeve:Yes
Product Specs
 Voltage120/240 Single-Phase
 Frequency:60 Hertz
 Alternator:Brushless
 Auto Voltage Regulation:Yes
 Fuel TypeGasoline
 Rated Amps:63 Amps @ 240 Volts (Single Phase)
 Portability Kit:Pneumatic Wheels
 Tank Size:16 Gallons
 Run Time (50% Load):10 Hours
 Fuel Tank Material:Plastic
 Fuel Gauge:Yes
 Decibel Rating @ 7m:Not Measured by Manufacturer 
 Idle Control:Yes
 Hour Meter:No
 Voltage Meter:No
 Lifting Eye:Yes
 Battery:Included
Overview
 Weight:450 Lbs. (204.12 kilograms)
 Dimensions:38.5L x 30.75W x 48.5H
(97.79 x 78.11 x 123.19 cm)
 Consumer Warranty:2 Years
 Commercial Warranty:1 Year
Download Documents


Outlets
12-Amp DC
NEMA 5-20R (Wall-Type)

NEMA 5-20R (GFCI)
NEMA L5-30R

NEMA L5-30R
NEMA L14-30R

NEMA 14-50R

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  1 Question
Q: What is the decibel level?
by Joey from Louisiana on August 06, 2012

A: Unfortunately, not all generator manufacturers publish the decibel ratings for their generators.

Currently, there are no industry standards or requirements for generator manufacturers to follow when testing their generators for noise.

Due to this, manufacturers can test the noise level under any conditions they choose and, therefore, the results are not very reliable as each company will test under conditions that are favorable to their products.

At this time there are no db(A) ratings available on this model.

by Mike, Product Expert
Guardian UltraSource 4582 Reviews & Ratings
Write Review
Overall Rating
Features
5/5
Quality
5/5
Performance
5/5
Value
5/5
Overall
4.7 out of 54.7 out of 54.7 out of 54.7 out of 54.7 out of 5
Pros
I'd Buy It Again (1)
Reliable (1)
Easy To Use (1)
Durable (1)
Cons
None to display.
19 Reviews  Sort by 
 
Robyn
REVIEWED
JUL.
05
2013
5 out of 55 out of 55 out of 55 out of 55 out of 5
Easy To Use
I'm a woman that was left this generator. I had never even started a generator before much less hook one up. With a little research, I hooked this generator up to my 2700sqft home and ran everything. I live in the sticks so my home runs on a lot of 220, well pump, septic pump, heat pump etc. This generator worked perfect and every time. Thank goodness for the low oil shut off or I would have destroyed it for sure.
Pros: Durable, Easy To Use, Reliable, I'd Buy It Again
Robyn Recommends This Guardian UltraSource Product
Was this review helpful?
10
Robert Vasquez
Alvin, TX
REVIEWED
FEB.
21
2009
5 out of 55 out of 55 out of 55 out of 55 out of 5
"worst Investment" Shines In Bad Weather
I bought this unit 4 years ago. My wife said it was the worst investment I ever made.

We live in Alvin, Texas- the last major storme we had was Alician in 1983. Well, I finally put this unit to work in 2008 after Hurricane Ike.

The unit rand for 14 days non-stop. I ran my whole house, including a 3 ton air conditioner.

Now my wife says it was BEST investment I ever made! We had neighbors, family members, and friends staying at our house because we had plenty of power.

I own a... more
Was this review helpful?
10
Wayne Riviere
Lacombe, LA
REVIEWED
SEP.
23
2008
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Workhorse!
What can I add to these reviews????

Got this unit a few years ago, and it is powerful enough to run my entire house!

We had an electrician install a transfer box, and we just plug the unit into this and pull the switch when the power goes out.

This powerful unit runs the whole house! 4-ton central AC, lights, refrigerators (2 fridge, plus a chest freezer!) TV........everything!

My only complaint is that I wish thay made this in a propane powered unit. I left gas in it one... more
Was this review helpful?
10
Ken Hill
Boulder, CO
REVIEWED
JUL.
01
2008
1 out of 51 out of 51 out of 51 out of 51 out of 5
Bad Experience
I bought one of these units in January. I set it up and it seemed to work fine. My wife used it to power our water pump at our small place in eastern AZ because we have no other power source.

All seemed fine until our water pump stared giving out. We figured the pump was old and needed replacement. The well drilling company I called in to do the repair noticed that our generator was putting out way too much power (154V on a 110 line, and 310V on the 240V side).

The motor was fine, but... more
Was this review helpful?
10
George Hothwell
REVIEWED
JUL.
02
2007
5 out of 55 out of 55 out of 55 out of 55 out of 5
Guardian Ultra Source 15,000 Watt Electric Start Generator Review
I wrote a review on Thursday 27 April, 2006 about this generator. During that previous review I tried to challenge the machine to see what it could do and if you read my review, you will be impressed as well.

In preparing for the 2007 hurricane season, I decided to give the machine a longer run, and see how much fuel it really uses under normal conditions. I put in 2 whole gallons of fuel.

My family and I tried to live in the house as we normally would until the fuel ran out

I ran the... more
Was this review helpful?
10
Chris Gittens
Bothell, WA
REVIEWED
SEP.
05
2008
5 out of 55 out of 55 out of 55 out of 55 out of 5
Satisfied 101
This is by far the best generator that I have purchased.

When I checked the output voltage at the 120v 240v output it measured @ the 120v 60hz side 121v-125v (depending on the load).

I have loaded this generator to about 17,000 watts for about a hour, with no problems. The only thing I wish I could change would be the RPM in order to bring up the frequency.

The only complaint I have is that the frequency hangs around 59 cycles. It is technically within specs. but sometimes my UPS has... more
Was this review helpful?
00
Charles Smith
REVIEWED
DEC.
28
2007
5 out of 55 out of 55 out of 55 out of 55 out of 5
Guardian Ultra Source 15,000 Watt Electric Start Generator Review
Thank you for the quick service. Because of the two ice storms recently - none of the major stores had access to this Generator. I had shopped around and compared carefully - the Guardian 15KW exceeded my needs at a great price.

I ordered the Guardian 15KW from you on Wednesday and by Friday I had the generator delivered, assembled, and tested. I took my time and within 2 hours it was out of the box and fully tested. This is one bear of a generator. I will tell my friends and... more
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00
William Ray
REVIEWED
DEC.
16
2007
5 out of 55 out of 55 out of 55 out of 55 out of 5
Guardian Ultra Source 15,000 Watt Electric Start Generator Review
Like so many others with emergency generators
I live in FL in a 1750 sqft house. With the 15KW generator and a transfer panel,I after a hurricane I ran almost my entire house on this generator including my central A/C heat pump without a single problem. Our refrigerator, hotwater heater, washer and dryer and range all worked just fine. The only change that I might make is to purchase a smaller generator that will allow the heat pump and refrigerator and small light to operate at night,... more
Was this review helpful?
00
Brian Swift
REVIEWED
SEP.
19
2007
5 out of 55 out of 55 out of 55 out of 55 out of 5
Guardian Ultra Source 15,000 Watt Electric Start Generator Review
Bought mine in Jan 07. Within a week, we had a 4 day power outage due to ice storm. Unfortunately the home wasn't properly wired for convenience, but the unit worked well with my improvised setup. Ran it for 4 days straight, no major problems. Reliable, started every time and handled running the entire home for the entire time. Since then have had some shorter outages, and the unit has done very well. No problem to report other than some warranty questions and a minor oil leak that seems to... more
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00
Mr. What?
REVIEWED
AUG.
25
2007
5 out of 55 out of 55 out of 55 out of 55 out of 5
Guardian Ultra Source 15,000 Watt Electric Start Generator Review
Wow, I owe my life to this machine. When the power went out, my heart-lung machine went to battery back-up. After 20 minutes it slowed to a crawl. My wife merely pressed the start button on this robust generator/beast and I quickly came back to life. Two thumbs up from me!
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00
Mr Watt
REVIEWED
AUG.
04
2007
5 out of 55 out of 55 out of 55 out of 55 out of 5
Guardian Ultra Source 15,000 Watt Electric Start Generator Review
this help save my life when the power went out and my oxygen tank stopped pumping - it turned it back on and i was able to breathe
Was this review helpful?
00
Free Freight
  • Ships via Semi-Truck
  • Curb Side Delivery
  • Free to Lower 48 States
  • Standard Rates to Alaska, Hawaii
We currently CANNOT ship this product to Canada or any destination outside of the United States
 


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