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Generac Guardian Series 5870 8,000 Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator With Transfer Switch (CARB Compliant)

3.9 out of 5 stars 25 customer reviews
| 5 answered questions

Price: $2,397.00 & FREE Shipping
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  • Convenient, hands-free operation with no fueling. No manual start. No extension cords. Runs on natural gas or liquid propane.
  • Clean, smooth True Power Technology provides safe operation of sensitive electronics.
  • Includes automatic transfer switch with 8 circuits protected (NEMA 1, indoor rated only)
  • 8,000 Rated Watts
  • CARB Compliant
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This item: Generac Guardian Series 5870 8,000 Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator With Transfer Switch (CARB Compliant)
Customer Rating 4 out of 5 stars (25) 3 out of 5 stars (33) 2 out of 5 stars (18) 4 out of 5 stars (5)
Price $2,397.00 $2,397.00 $2,187.00 $2,997.00
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Wayfair Amazon.com Amazon.com Amazon.com
Power Source natural-gasoline-powered propane powered Information not provided gas powered
Wattage 8000 Watts 8000 Watts 8000 Watts 11000 Watts
Voltage 120 Volts Information not provided 240 Volts 120 Volts
Dimensions 29 inches x 25 inches x 48 inches 29 inches x 48 inches x 25 inches 29 inches x 48 inches x 25 inches 29 inches x 48 inches x 25 inches
Add to Cart Add to Cart Add to Cart Add to Cart

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Product Description

Includes 10 Circuit EZ Switch With Built-In Load Center (GRCNRTS10EZA1), 1-ft Flexible Fuel Line Connector, Composite Mounting Pad, Instruction Sheets

Product Information

Product Dimensions 25 x 48 x 29 inches
Item Weight 336 pounds
Shipping Weight 336 pounds (View shipping rates and policies)
Manufacturer Genender Intl Imports
ASIN B003IT76BQ
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Item model number 5870
Customer Reviews
3.9 out of 5 stars 25 customer reviews

3.9 out of 5 stars
Best Sellers Rank #313,861 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
#669 in Patio, Lawn & Garden > Generators & Portable Power > Generators

Technical Specification

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By D. Emmett on October 19, 2012
Please consider our experience before purchasing a Generac 5870:

Installed July 2011. Battery charging module in control panel failed immediately. Replaced battery in early August assuming that was the problem. New battery failed (completely discharged) end of August: we contacted Generac. Diagnosed as defective control panel. It took 1½ months more - October 15 - before new panel was installed. We then purchased a 3rd new battery (originally, the generator did not come with one).

Early 2012, generator engine taking longer to start while cranking. Engine failed to start end of February: reported to Generac. Observed that it would start - after extended cranking - if air inlet on the air-box is covered with my hand. Accidently discovered that engine would start immediately if a "factory hole" in the air-box was sealed off. Generac replaced the air-box, end of April 2012. Engine still failed to start unless "factory hole" in new air-box sealed off.

Generac suspected LP gas supply issue: inspected & tested OK per Gas Co. on May 6 (they performed original installation). Engine completely failed to start July 2 - reported to Generac. Further calls & emails to Generac not returned for 2 weeks, then received call that Generac will replace fuel regulator. Again calls or emails to Generac not returned: finally after 25 more days regulator replaced: August 7- issue resolved!

August 8: "Inspect Battery" flashing on control panel display. September 1, battery dead: reported to Generac that charger in control panel again failed. October 3, per Generac Customer Service: "The Service VP and the Sales VP - both are having further discussions regarding whether or not to issue the swap (a new control panel)". Today, October 20: no contact from Generac for 17 days. Of the 15 months that this generator has been in service, it has functioned properly for less than 3 months. Should have bought a Gillette Sentry Pro!!!
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I purchased the Generac 5870 Generator in July 2010. It arrived by CEVA freight and the driver dropped it off 10 feet from the site that I prepared for it. Upon inspection it was in great condition except for a small ding at the base of the unit; no problem just cosmetic. I decided to keep it versus send it back and wait for a new one. It came with a 5 foot electrical tail protruding from the generator and two tails protruding from the transfer switch (a two foot tail that attaches to your main distribution panel and a 30 foot tail that connects to the generator's 5 foot tail via a connection box). Instructions are well written and easy to follow. I am a retired IT Executive with some knowledge about electrical connections so I did the electrical hookup myself. The gas connection I sub-contracted to a local propane service agent. I am glad I did as the gas connection line depends on the distance from the propane tank to the generator and the number of appliances and associated BTU's that are hanging off the gas line that you want to connect to. Because I was on the cusp of exceeding the exisitng gas line capacity, I decided to run a separate one inch gas line to where the propane tank line enters the house. Since an additional regulator and line was required, the existing piping and regulator had to be re-piped and teed. Switching the generator from natural gas to propane is very easy. Just place the T-handle into the slot located on the air breather housing inside the generator, pull it out (spring tension), and turn clockwise 90 degrees. The orfice is now good to go for propane. The gas contractor charged $98 an hour plus parts. It took him 4 hours (@400). I haven't receive the bill yet for the parts.Read more ›
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My wife and I own a second house which is way out on the end of the power line run. Blackouts are frequent and last a long time when they happen. We leave the house open and running year round and like to get out there every couple of weeks during the winter, but have always been afraid that a blackout would freeze and damage the pipes. We finally, after years of being lucky, bought and installed a Guardian 8kw automatic LP generator. Right out of the box, the unit wouldn't run, but after several service visits and a mountain of parts, the generator was pronounced ready to go. Lo and behold, we go out to the house last weekend, the generator status panel lists an overcrank failure, and I've got frozen and blown pipes. My new slogan for Generac that I share with all my friends: Never trust your home to a Generac.
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I have a 8KW Generac Generator that was purchased 25 months ago. The first breakdown was a air filter hose that vibrated lpose from the engine, the unit will not start if the hose is loose. Technical showed up a couple of weeks later and tightened the connection. Second incident was a out of control run situation. The unit had to be manually turned on and off, cause was a blow fuse in the Switch Box. Not covered under warranty. These are minor issues but getting a technician to show up is problematic. If you live in the boonies and need a technician that has been trained by Generac, good luck.
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I had a Generac Guardian 8kw generator installed at my home about 15 months ago. Three weeks ago we experienced a power outage, our first since the unit was installed. The generator failed to provide any backup power. In fact, it did nothing at all. After checking the unit, the person who installed it told me the failure was due to an "over speed" problem. He explained how I could do periodic checks on the generator's status. I had a simple question about his instructions that I posted on Generac's web site. This evening I received a reply from Generac stating that my question had been "rejected". No explanation as to why. So much for the company's customer support.
5 Comments 105 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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