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2-Year Lawn & Garden Protection Plan

from Asurion, LLC
  • Delivered by e-mail, register and file claims online or by phone
  • Coverage includes free repairs or replacement after manufacturer's warranty expires, with no deductibles
  • Covers hardware, electrical and mechanical failures
  • Coverage includes free shipping
  • Fully transferable with gifts, cancel anytime, full refund in the first 30 days

1-Year Lawn & Garden Extended Protection Plan

from Asurion, LLC
  • Delivered by e-mail, register and file claims online or by phone
  • Coverage includes free repairs or replacement after manufacturer's warranty expires, with no deductibles
  • Covers hardware, electrical and mechanical failures
  • Coverage includes free shipping
  • Fully transferable with gifts, cancel anytime, full refund in the first 30 days

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Generac 5791, 800 Running Watts/850 Starting Watts, Gas Powered Portable Inverter

3.8 out of 5 stars 95 customer reviews
| 45 answered questions

Price: $319.00 & FREE Shipping. Details
Pay $26.47/month for 12 months ($319.00 total) with Equal Pay Financing on the Amazon.com Store Card. Learn more
In Stock.
Ships from and sold by Amazon.com.
800 Watt
    This fits your .
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  • Up to 40% lighter than a standard generator of equal watts
  • FlexPower to save fuel, reduce noise and safely power sensitive electronics
  • Low oil shutdown protection prevents engine from damage
  • LED indicator lights on the control panel indicate system status
  • Electronic circuit breakers protect against overloads
12 new from $319.00

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Frequently Bought Together

  • Generac 5791, 800 Running Watts/850 Starting Watts, Gas Powered Portable Inverter
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  • No-Spill 1405 2-1/2-Gallon Poly Gas Can
Total price: $342.57
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Style: 800 Watt
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Technical Details


Compare to Similar Items


This item: Generac 5791, 800 Running Watts/850 Starting Watts, Gas Powered Portable Inverter
Customer Rating 4 out of 5 stars (95) 4 out of 5 stars (264) 4 out of 5 stars (164) 4 out of 5 stars (515)
Price $319.00 $131.05 $489.00 $161.99
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Amazon.com Amazon.com Amazon.com
Power Source gas-powered gas powered gas powered Gasoline
Wattage 800 Watts 900 Watts 1600 Watts 1500 Watts
Voltage 120 Volts Information not provided Information not provided Information not provided
Dimensions 15 inches x 18 inches x 10 inches 13.5 inches x 14 inches x 12 inches 18 inches x 18 inches x 11 inches 17.1 inches x 19.9 inches x 15.9 inches
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Product Description

Style: 800 Watt

Product Description

Designed for life on the road, Generac's iX800 inverter generator featuring a durable, lightweight, compact design with a built-in handle offers clean portable power for camping, tailgating, and recreational use. The iX800 inverter generator provides 800 running watts and 850 starting watts.

From the Manufacturer

Generac's iX Series inverter technology takes the raw power produced by the generator and passes it through a special electronic microprocessor to provide clean and stable power, safe for computers and other sensitive electronic devices. Designed for life on the road, its durable, lightweight, compact design with built-in handle offers portable power for camping, tailgating, and recreational use. Inverter generators utilize a different type of alternator than standard generators to generate AC power. The raw power produced by the generator is converted into AC power by a digital inverter module. The inverter technology reduces the generator's size and weight. But more importantly, it allows the engine to run at varying speeds, significantly reducing noise and fuel consumption levels. The Generac iX Series has clean consistent output power with less than 3% total harmonic distortion especially important with sensitive electronic devices such as computers and DVD players.

Product Information

Style:800 Watt
Product Dimensions 18 x 10 x 15 inches
Item Weight 29 pounds
Shipping Weight 36.6 pounds (View shipping rates and policies)
Department Tools
Manufacturer Generac
ASIN B002NKMG5M
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Item model number 5791
Customer Reviews
3.8 out of 5 stars 95 customer reviews

3.8 out of 5 stars
Best Sellers Rank #15,660 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
#21 in Automotive > RV Parts & Accessories > Power & Electrical > Generators
#35 in Patio, Lawn & Garden > Generators & Portable Power > Generators
#106 in Patio, Lawn & Garden > Generators & Portable Power > Power Inverters

Technical Specification

Warranty [pdf ]

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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From the Manufacturer


Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Style Name: 2000 Watt Verified Purchase
No problems so far, tested loads up to 2100w for short busts and takes it in stride, 2000w continuous no problem. I am using this for camping and PA speakers/subs. It *IS* noisier than a Y*mah* or H*nda, but hey, it was half the price. As for protecting the primer bulb from rot, I made a "flap" of tape to shield it from UV light. I try to do this whenever I can. I'll keep this review up to date as the genset gets older, 15 hours or so on it now and still trucking.

Update 9/5/2015:

Still cranking first pull and chugging along at 55 hours. Either this thing is getting quieter as it beaks in or I can't hear it anymore... I've since added a cheap inductive timer to better track usage. I changed the oil at 50 hours with Rotella T6, old oil was surprisingly clean. Cleaned/oiled the air filter as well. It was used for a couple weekend camping trips here in Cali since fires are a no-no. Hot plate, task lighting, and everyone's electronics that "needed" charged ;) (~1800w total) at the site no problem. Lovin' this thing! No issues with the primer bulb as the tape flap is still hanging on.
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Style Name: 800 Watt Verified Purchase
Follow up - August 23rd, 2010:

Generac finally replaced my leaking unit. Hours of work on my part. The new unit idles quite different. On normal mode it idles significantly lower and flucuates up and down. In the economy mode, it simply idles even lower. The first unit seemed to idle normal (who knows) or high. In economy mode it flucuated up and down as stated in the manual. The electrical outlets are different. The first unit had commercial 120v outlets - one plug vertical, one horizontal. I spent $50 for a commercial extension cord. The new unit has regular (parallel) plugs. Therefore I'll need to buy an adaptor. Unbelievable. If there are any more problems I simply will pay someone who knows what they are doing (Generac's service people do not) or throw the unit out. Stay away from this unit. And stay away from Generac.

June, 2010 - Unit was defective out of box. Significant oil leak from engine even when not running. Took to 2 authorized Generac service shops. Still leaks. Leak is where 2 aluminum machine surfaces come together. Still trying to get resolution. Generac customer service fair at best. Takes considerable time to reach a human being. The unit already looks 2 years old due to the handling by the repair people and I've never used it. Generac has still not offered to replace. They "don't make the motors". A great excuse. I will contact Amazon corporate office if necessary to tell them not to sell this company's products and file in small claims court if necessary against Generac. Please consider other manufacturers' if you are looking for a small generator. I may be contacted at nfre at comcast dot net for photos of leak. Thank you.
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Style Name: 800 Watt
Got this unit for a very low price through Amazon.com. Cranked it up and worked ok. Next day it would not hold voltage. took to authorized dealer. 4 weeks later told me the carborator was dirty and not covered by warranty. male bovineshit! the nit needed adjusting. a warranty charge. but why wait for the manufacture to come up with the payment when you can hit the owner with a $75 "clean carburetor" charge. What a rip off.
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By Bird Man on July 18, 2011
Style Name: 800 Watt Verified Purchase
Poor repair service. In the 7 months the repair company has had the thing it hasn't been touched. Generac won't approve the repair of a generator that didn't work right out of the box. Worst customer service i have ever seen. DO NOT BUY!!!
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Style Name: 2000 Watt
Great Generator except for one very important thing.There is a rubber type primer bulb on the side that will wear out in the sun and burst over time (about 3 weeks) and it cannot be replaced. i had to turn mine in and 5 coworkers units in due to this issue for warranty replacements. so far 2 of the new units primer bulbs have busted again. each time we warranty the item we get the same item back with the same issue. hopefully with enough time we will eventually get a unit without this primer bulb in a new improved version. Until then save your money and the hassle
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Style Name: 2000 Watt
Bought this unit at a local retailer today. Read the included warranty paperwork, and it's going back tomorrow. The "Two Year Warranty" covers ONLY the "Engine - All components" and "Alternator - All components". That's it. Doesn't cover the inverter electronics, circuit breaker(s), 12V battery charging cable, internal wiring, handle, cabinet, rubber feet, or anything else.
The included warranty also states "This warranty shall not apply to the following: Generac portable generators that utilize non-General replacement parts." This is in clear violation of the 1975 Magnuson-Moss Warranty Act, specifically the portion not allowing product "tie-ins". (It's a violation of consumer rights to void a warranty simply for using third-party replacement parts; in this case, could be the replacement of a broken pull-start cord/handle, a lost fuel cap, or installation of a new fuel filter.)
They might not -enforce- these harsh warranty policies, but looking at the number of 1 star reviews (35% at the time of this writing), it seems likely, as most of the complaints are warranty-related.
I can't support a company that advertises a "Two Year Warranty" on the box, but whose actual warranty policy doesn't cover (some of) what's in the box for even one single day.

See scan of actual warranty paperwork below:
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