Generac 4582 2 Ultra Source 15 000 Watt Portable Generator CARB Compliant

The Generac Guardian ultra source 15,000-watt portable generator is one of the most powerful portable generator on the market. Powered by a 992 cc Generac OHV V-Twin Industrial Engine industrial grade engine, a powerhouse that’s renowned for its reliability, long life, impressive power and smooth, quiet operation, this generator provides enough power to start a 4-ton air conditioning unit.

This engine offers the finest lubrication technology available by providing instantaneous disbursement of lubricant to all engine parts. It also features a spin-on oil filter, which is an automotive style for easy maintenance.

Powered by a 992 cc Generac OHV V-Twin Industrial Engine industrial grade engine. See the generator’s specifications. View the generator in greater detail.

An easy electric start eliminates the need to pull a rope.

It also offers one of the longest life expectancies in the industry, with over 3,000 hours of runtime. Guardian Ultra Source portable generators feature an electronic governor, which maintains steady speed and eliminates voltage drop when loads are applied. This, as well as the automatic voltage regulator, provides a smooth rate of electricity, which is especially important for sensitive electronic devices such as computers.

A large, 16-gallon capacity fuel tank give the generator a 10-hour run-time at half-load capacity, ensuring you have the power you need. An easy electric start eliminates the need to pull a rope. A simple push of the ignition and an automatic ignition timing sets the spark for easy starting and optimum operating performance. The generator runs on gasoline and meets all EPA emissions requirements.

To keep your electrical equipment running, the generator includes nine outlets, including a 50 Amp high power outlet, three twistlock plugs and two GFCI protected duplex outlets. The generator also includes heavy-duty 13-inch all terrain tires, ensuring that you’ll get the power to where you need it the most, a full 1.25-inch tubular frame, battery charge cables and a maintenance-free battery. The generator measures 38.5-by-30.75-by-48.5 inches (HxWxL), weighs 450 pounds and is backed with a 2-year limited warranty.

User Ratings and Reviews

5 Stars VERY SATISFIED
I have bought and installed two Guardian/Generac 15,000kw generators with very little effort and they have performed nearly perfectly. Considering the price and the terrific capability I am very satisfied. My brother has installed the more sophisticated version with with the automatic switching panel. I just did a fast and easy installation by backfeeding the house panel. I installed a 4-leg heavy-duty 75 amp “welding” outlet protected by 50 amp breakers attached to the main house breaker panel. Then I made a 4-leg, 8 gauge double female end extension cord and connected the generator to the 4-leg panel outlet. In a power outage I open the main panel breakers to separate the house panel from utility power, connect the extension cord, start the generator, and close the generator’s 50 amp breakers and the breakers protecting the 50 amp “welding” outlet. Then I can run anything connected to the main panel up to the capacity of the generator: lights, well pump, water heater, A/C, stove, refrigerator, stereo, even computers (using a UPS). I also have a nice long 120v 15A extension cord that reaches my neighbor’s house so they can have lights and refrigeration. They do not seem to mind the generator’s noise at all! The generator is noisey, but that is a small price to pay to have heavy-duty power. When I get around to it I may build a sound-reducing box. I have noticed a little surging which I cured with a mixture adjustment. So the most important question is would I buy again? Yes, absolutely!

5 Stars a good generator high output
I got this generator within 5 days. The truck pulled up with no lift gate. The driver suggested off loading it to the bed of my pickup, had to get 2 others to help us. once off loaded to my pickup the driver was like ok later its all yours. Took me a few hours to rig something up to get it off my truck, this thing is very heavy just like they say.

Assembly is stright foward it helps to have someone help you but can be done by one person it needed. Make sure you read the instructions because you need to add oil to it before you start it. Added oil and gas it started right up. I have a concession trailer and it takes alot of amps to run it, this did it no problem. I checked the voltage with a meter and it stayed within 1/2 a volt or so, output with no load was like 124 volts and 239.6 at the generator. I took this to an all day event and ran it like 13 hours it ran fine out of the box with no problems. As the others have stated this thing is loud and will eat some gas, alot of gas. However if you need the power it will do the job.

There was another vendor there with the very same generator who told me he has had his for sometime now and runs electric fryers off of it. He runs a 24 ft concesson trailer off this one generator and said it has done the job for him with no problems. He did givem me 2 tips that i will pass on.

#1 the generator has a low oil shut off if for some reason it shuts off you can not pull the oil dip stick out when it is hot cause it swells some when hot. You must wait for the unit to completely cool off to check the oil, so pull the dip stick out alittle when running it.

# 2 is before traveling make sure to drain all the gas out of the engine to pervent the float from becoming damaged (this is only if you have it loaded on a trailer for some time).

So far I am very happy with this generator the shipping sucked so watch for that if you dont have a forklift. hope this helps.

4 Stars Not rocket science… but…
This unit is a reliable beast. I suspect that direct buyers (no local dealer) might have difficulties getting their generator to peak perform, right off the pallet. This unit generally requires some fine tuning to run smoothly, and if you are not mechanically adept, buy a smaller unit with a Honda. The Generac motor has been around for a long time, and is a very reliable (as in better than the riding mower engines) power plant. It does need to be tuned to run with the demand. It has a controlled idle that jumps around a bit as your electrical load varies, but is normal. If you are not a tweaker, get the Honda. (See above.) I converted my unit to tri-fuel, and use on natural gas. Paid $1350 for the beast and about $400 for the conversion kit. All copper windings, made in Wisconsin. Buy American when you can.

1 Star Super Bargains Now breaks the law!!!
My purchase from Super Bargain Now was a horrible experience. I recommend that Amazon should quit their affiliation with them immediately. Super Bargains Now advertised a price on their web page and I bought the product. They then refunded my money and said the price was no good. I will never do business with Super Bargains Now or Amazon ever again. I do not see how a company can advertise a price and not back it up. It was blatant false advertising.

4 Stars Great for the Whole House, Not for Electronics
I am very happy with this generator, but I would not recommend using it for electronic equipment (computers, TV’s, etc), as it is not very stable, especially under large loads.

I ran a test to see what it could handle, below is a description of the items I turned on, and the order in which they were enabled. I connected this generator up to my whole house using a 200 amp manual transfer switch, which was professionally installed by an electrician. The transfer switch has a watt-ometer on it, so I can estimate how much wattage I am using.

1) 100 Gallon Hot Water Heater: ~4800 watts. (I opened all the hot water taps to make sure that the heater was running.)

2) 3 ton air conditioner (Trane XL19i) ~3600 watts (Set temperature to 65F to ensure that both compressors were working)

3) 2 refrigerators. ~800 watts each. (set the temperature to the coldest setting on both of them to make sure they were running)

4) 20″ TV. ~300 watts

5) PC w/ 2×21″ monitors ~300 watts total

6) Washing Machine ~500 watts (put a load in for the spin cycle)

7) Dishwasher ~500 watts

Pool Pump ~500 watts

So far all of the above was running at the same time, and everything was fine except the backup battery alarms on the TV and the PC were sounding. It seems the power was not stable enough for those devices, so I turned them off.

I kept everything else running, and I was determined to overload the generator to see if it would shut off as described in the manual. So, I proceeded to turn on some more large and medium appliances.

9) Clothes Dryer ~5700 watts

10) 4 stove top burners set to high ~200 watts each

11) Oven set to 450F ~5000 watts?

12) 6 overhead lights ~100 watts each

13) Sprinkler / Well Pump ~500 watts

14) Microwave oven set to High ~1500 watts

15) Garbage Disposal ~200 watts

I ran out of appliances and large items that I could turn on. All of the above was running at the same time, which of course is not a typical household scenario. I was very impressed.

My electrician told me that electrical devices all have exaggerated wattage ratings, so you cannot simply look at the back of device and determine how much wattage it will use. This is why my numbers add up to way more than 15,000 watts. In addition, the rating on a generator is the minimum it can handle, so it is possible that the generator could be producing slightly over 15,000 watts, depending on quality of fuel and other factors. Regardless, this test proves that the generator can handle your whole household without a problem, just keep your electronic devices plugged into a more stable generator.

It is quite loud. It sounds like a Harley running at 3500 rpm. Much louder than my 3000 watt generator, and louder than my 2300 psi pressure cleaner. The smell of the exhaust is very strong as well, so keep ventilation at a maximum. Don’t place it next to any bushes as the bush will die from the heat and carbon monoxide (I know this from my own experience

On a separate test, I ran the generator for an extended time period to see how much fuel it uses. I plugged it into my house and ran a more limited set of appliances which would represent a typical day. The fuel consumption was about 1 gallon per hour, so keep this in mind when storing fuel for something like a hurricane. I purchased a fuel storage tank which can hold 120 gallons with a pump on it, and I can also keep 17 more gallons in the generator itself. Of course there is the risk of all this fuel going stale very quickly, so I only purchase it when I see a hurricane coming. If I never need it, I just use it for my cars.

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