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Product Description
Amazon.com Product Description
Experience fast-acting, automatic protection from power loss with the Generac Guardian Series 5875 20,000 Watt Air-Cooled Propane/Natural Gas Powered Automatic Standby Generator with Aluminum Enclosure. Ideal for home use, this generator powers up automatically and within seconds of a power outage without the need for any manual startup. Without any buttons to push or cords to plug in, an automatic standby generator starts up by itself even when you're away! Featuring easy installation, it comes pre-wired and packaged with virtually everything necessary to connect to your home's electrical system and existing LP or natural gas fuel supply, so you can be protected the next time the lights go out.
Hands-Free Automatic Operation
When the power goes out, this generator eliminates the trouble of dealing with a fuse box in a dark basement or going outside in a storm to start a portable generator. After all LP or natural gas and electrical connections are completed, the Generac 5875 is ready to run 24/7 and requires absolutely no manual operation, no fueling, and no extension cords. The generator responds within seconds of power outages, so inconveniences like heat or air conditioning loss and burst pipes or spoiled food are quickly avoided. Find the Generac Generator That's Right for Your Needs
 A 999cc Generac OHVI® Engine delivers reliable performance with its long-life design. View larger . |
 Standby generators power up automatically within seconds of a power outage to keep your family safe and comfortable. View larger . |
When the power goes out, this generator eliminates the trouble of dealing with a fuse box in a dark basement or going outside in a storm to start a portable generator. After all LP or natural gas and electrical connections are completed, the Generac 5875 is ready to run 24/7 and requires absolutely no manual operation, no fueling, and no extension cords. The generator responds within seconds of power outages, so inconveniences like heat or air conditioning loss and burst pipes or spoiled food are quickly avoided.
Initial setup is easy. The generator arrives pre-wired and equipped with the necessary installation gear: a 200 Amp service entrance rated transfer switch , an outdoor connection box, a flexible fuel line pigtail, and a composite mounting pad. (Additional items and tools may be needed to complete the installation to meet local codes. Consult a licensed professional for further details.)
The unit can be programmed to perform a weekly exercise at the time of your choice, so it will be ready for continuous and reliable operation on a moment's notice. For convenience, it also offers clear, digital controls, an at-a-glance status indicator, and an external GFCI outlet to accomodate your outdoor power needs.
Superior Technology for Secure Output, Quiet Operation, and Durability
Thanks to Generac's exclusive True Power Technology, this generator provides clean, continuous power, so sensitive electronics and microchip appliances like laptops and HVAC equipment can be operated without the worry that unexpected power surges bring. Also featuring Generac's patented Quiet-Test technology, this generator is truly neighborhood-friendly: it's self-test mode is as hushed as an idling car to ensure that your daily routine is unaffected.
The generator's aluminum enclosure offers superior corrosion resistance and is protected by Generac's proprietary RhinoCoat system--a unique process that binds the paint to the metal surface for a long-lasting, durable finish. This allows the generator to sit outdoors and withstand harsh weather conditions without developing an unsightly appearance.
Like all Generac generators, this model is UL (Underwriters Laboratories) listed for safety.
Rugged, Worry-Free Design
The generator features the 999cc Generac OHVI® Engine, an exclusive air-cooled generator engine with a high-performance design that can accommodate large electrical loads. The engine optimizes power to respond swiftly to changing conditions. To add to your peace of mind, the engine requires routine maintenance only once every two years, or after 200 hours of use.
This Generac generator meets CARB requirements. It requires a Group 26R 12-volt minimum 525 CCA battery (sold separately).
What's in the Box
Generac Guardian Series 5875 20,000 Watt Air-Cooled Propane/Natural Gas Powered Automatic Standby Generator with Aluminum Enclosure; 200 Amp NEMA 3R service entrance rated automatic transfer switch, base fascia and composite mounting pad; installation guide and owner's manual.
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| Model # | Rated Power (Watts) | Enclosure Type | Automatic Transfer Switch | CARB Compliant |
|---|---|---|---|---|---|
| 5870 | 8,000 | Steel | 100 Amp NEMA 1 8 circuit load center | Yes | |
| 5871 | 10,000 | Steel | 100 Amp NEMA 1 10 circuit load center | Yes | |
| 5872 | 14,000 | Steel | 100 Amp NEMA 1 14 circuit load center | Yes | |
| 5873 | 17,000 | Steel | 100 Amp NEMA 1 16 circuit load center | Yes | |
| 5874 | 17,000 | Aluminum | 100 Amp NEMA 1 16 circuit load center | Yes | |
| 5875 | 20,000 | Aluminum | 200 Amp Nexus Smart Switch NEMA 3R service rated | Yes | |
| 5887 | 20,000 | Aluminum | Not Included | Yes | |
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| Model # | Rated Power (Watts) | Enclosure Type | Transfer Switch | CARB Compliant |
| QT02516ANSX | 25,000 | Steel | Not included | Yes | |
| QT03016ANSX | 30,000 | Steel | Not included | Yes | |
| QT04524ANSX | 45,000 | Steel | Not included | No | |
| QT042524ANSC | 45,000 | Steel | Not included | Yes | |
| Model # | Rated Power (Watts) | Enclosure Type | Transfer Switch | CARB Compliant |
| QT02224ANAX | 22,000 | Aluminum | Not included | Yes | |
| QT02724ANAX | 27,000 | Aluminum | Not included | Yes | |
| QT03624ANAX | 36,000 | Aluminum | Not included | No | |
| QT04842ANAX | 48,000 | Aluminum | Not included | No | |
Product Description
20/18KW 120/240 NG/LP Standby Generator, With 200A Transfer Switch, Powerful Output For Whole House Protection, Transfer Switch Is Service Entrance Rated, With Nema 3R Outdoor Rated Enclosure, True Power Technology Provides Clean Power Output For Confident Operation Of Sensitive Electronic Equipment & Appliances, Meets IEEE/Utility Standards, OHVI Industrial Engine Designed Specifically For High Demand Generator Applications, Full Pressure Lubrication Ensures Instant, Total Lubrication To Vital Parts, Aluminum Enclosure Stands Up To Harsh Coastal Climates, User Friendly Digital Controls, At A Glance External Status Lights & Patented Whisper Test Low Speed Exercise Mode For Quietest Operation, Can Be Powered By Propane Or Natural Gas, Comes Factory Ready For Natural Gas Usage.
Customer Reviews
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Most Helpful Customer Reviews
122 of 124 people found the following review helpful:
5.0 out of 5 stars
20KW Runs the whole house!,
By
This review is from: Generac Guardian Series 5875 20,000 Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator With Transfer Switch (CARB Compliant) (Lawn & Patio)
In May I will have had this generator installed for 2 years. I have had ZERO problems with it! Just like it is supposed to it "wakes up" every Monday morning and runs at half speed for about 12 minutes to keep everything limber. Recently, I discovered Amazon had the maintenance kit for only $13.97. It has a new air filter, oil filter and 2 spark plugs. Generac recommends changing the oil at 200 hours or 2 years whichever comes first, so my plan is to change the oil at the 2 year boundary next month.
I have had 2 complete power failures here in the country over the last 2 years. One lasted about an hour and a half. Both times the generator started in the required 10 seconds or less and the power transferred automatically. I had to laugh when I saw the power company truck drive by looking for the outage and our lights were the only ones on. Grin!! But I am a retired Electrical Engineer and I KNOW how this stuff works. This 20kw unit has practically rock solid voltage and frequency regulation. I have one of those little plug-in units called a Kill-A-Watt and the frequency counter maybe goes down to 59.9hz and up to 60.1hz occasionally, however, most of the time it stays right on 60hz. Now I will admit when the whole house air conditioner starts the generator "moans" a little bit but recovers instantly and keeps on truckin'. The only other comment that might be appropriate here is my surprise when the electric contractor that installed the unit poured the concrete pad that it sits on. I asked, "Isn't this too small". They assured me it wasn't. And since, in the past I had one of the Generac 10kw contractor units that is almost twice the size, was I surprised when I saw how small this unit was. But new technology has allowed even generators to shrink. All in all I give this generator an A+. I am TOTALLY happy!!
58 of 58 people found the following review helpful:
5.0 out of 5 stars
Held up wonderfully during a 50+ hour outage,
This review is from: Generac Guardian Series 5875 20,000 Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator With Transfer Switch (CARB Compliant) (Lawn & Patio)
I purchased a new construction home four months ago and had two options for a back-up system for the sump pumps in my finished basement: (i) a battery back up with a three hour life, or; (ii) the 20 kW Generac Guardian Series Generator. I went with the generator and it was worth every penny. Three days ago a massive storm rolled through the Chicago area and two tornadoes touched down very close to my home. Electric service to more than 400,000 homes and businesses went out - but the generator kicked on within about 10 seconds of the outage. After 2+ days (about 50 hours after the outage) our power came back on. This generator ran the entire time, powering two refrigerators, two air conditioner units, the entertainment center in my home and a number of lights and outlets. No problems whatsoever: no flickering, no failing, nothing. It did cut down a tad when the air conditioners kicked on but immediately regained full stride. What a machine. When power was restored I checked the oil - still light in color and reading full. What a machine!
42 of 42 people found the following review helpful:
5.0 out of 5 stars
Generac 5875 Best investment,
This review is from: Generac Guardian Series 5875 20,000 Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator With Transfer Switch (CARB Compliant) (Lawn & Patio)
Over a year now we bought this and had it wired by local contractor, came with 200 amp transfer panel.
Peace of mind when the power goes out, count to 13 and varoom back on.....this has enough power to run the whole house (3500 Sq FT 2 story) 2 fridges. When the power comes back it idles and cools down and shuts off. Normal homes here have 150 amp service, this was designed to handle a normal house without over taxing the generator. Common sense says don't run the microwave or hair dryers but it can handle if it has too. We live in Houston TX and when power goes out gas is hard to find for regular generators, this is plumbed into natural gas line and doesn't require much maintenance. Mobil 1 oil filter 209 fits and has larger capacity. Super easy to change filter and oil, everything is right in the front. This is probably the best investment we have added to our home.
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