Loading... Please wait...

Generac Guardian 8kW Standby Generator Pre-Packaged w/100 Amp-10 Circuit ATS

Generac Power Systems Generac Power Systems
Model#: 5870
This product is no longer available for purchase.
To see the product that replaced this model or one
similar in specifications click on the button below.
New Model
This product is no longer available for purchase.
To see the products that replace this model or ones
similar in specifications click on the button below.
New Model
This product is no longer available for purchase.
There are currently no similar or related products that replace it.
We have kept the model's documents available for download:

Maintenance Kits, Replacement Parts & Accessories

Generac Power Systems 5839 Details and Specifications

Generac Guardian Air Cooled 8kW Standby Generator Pre-Packaged w/100 Amp-10 Circuit Automatic Transfer Switch

Not only includes upgraded features with the Nexus controller but also includes several additional features.

• External common fault alarm: Allows for a connection to drive a common alarm if any shutdown for the generator occurs.
• Wiring Error: Gives indication if the transfer switch is connected incorreclty without allowing board damage.
• Battery Sentinal: Monitors battery to indicate that the battery is going to fail or if it has failed.
• Generator High Voltage Shutdown
• Internal Fault Shutdown: Shuts down generator in event of controller failure
• Nexus Controller: +/- 1% voltage regulation, smart charging battery system where output voltage is dependent upon ambient temperature and only charges the system when needed.
• External Mainline Circuit Breaker: Allows power shutdown without having to open or unlock the enclosure.
• Sturdy, galvanneal steel enclosure with RhinoCoat finish for superior weather protection.
• Digital NEXUS Controller, Two-line LCD Tri-lingual
• Product Activation: Requires each generator to be activated via website or phone before automatic function is enabled for warranty activation start point.

Includes: 100 Amp 10 Circuit Nema 1(Indoor Rated) Automatic Transfer Switch, Pre-Wired Conduits, Composite Mounting Pad, Flexible Fuel Line Connector, Pre-Wired External Connection Box.

Generac $50/$50 Referral Rebate, Click Here

Product Specifications

Model Number 5870
Manufacturer Generac Power Systems
Made In USA Yes
Rated Watts 8kW
Rated Amps 33.3 LP/29.2 NG
Voltage 120/240V Single Phase
A/C Ton Rating 3 Ton
Enclosure Steel
UL Listed Yes
Decibel Rating 62 db(A)
Starting System Automatic
Low Oil Alert Yes
Mainline Breaker 35 Amps
Hour Meter Yes
Voltage Meter No
Battery Requirement Group 26R, 12Volt, and 350CCA
Mounting Pad Composite (Included)
Product Weight 340 lbs.
Dimensions (Inches) 48L x 25W x 29H
Engine Brand Generac
Engine Size 410 cc/OHVI
Engine RPM 3600 RPM/14.8 HP
Cast Iron Sleeve Yes
Cooling System Air Cooled
Alternator Type Brushed
Frequency 60Hz
Auto Voltage Regulation Yes
Fuel Type LP/NG
NG Power Capacity 7kW
LP Power Capacity 8kW
NG Consumption @ Full Load 139 cu.ft/hr
NG Consumption @ 1/2 Load 77 cu.ft/hr
LP Consumption @ Full Load 1.68 gal/hr
LP Consumption @ 1/2 Load .94 gal/hr
Transfer Switch
Transfer Switch Model RTS10EZA1 Nema 1, Indoor rated
Transfer Switch Amps 100 Amps
Transfer Switch Circuits 10 Pre-Wired Circuits
3 - 15A 120V
3 - 20A 120V
1 - 20A 240V
1 - 30A 240V
ATS Poles 2 Poles
Warranty Information
Consumer Warranty 3 Years Limited
Commercial Warranty 3 Years Limited
Shipping Weight 524 lbs
Shipping Dimensions 27H x 50W x 45D
You need to be logged in to write a review.
Write A Review

Product Reviews

Showing reviews 1-10 of 15 | Next

  1. Well Built For a Reasonable Pice

    Posted by Ralph Warnick on 22nd Feb 2013

    Generator was received on time in great shape.
    Follow directions and any one with a little
    mechanical knowledge can install it.
    Plan on paying gas co. a couple hundred dollars to install propane regulator and gas line.

  2. I can sleep at Night

    Posted by Tom on 3rd Jan 2013

    Purchase the Generac 8k with 100 amp ATS
    For my Country home. It arrived quickly and in good condition. Now I can sleep at nights without worrying about loosing heat and my pipes freezing

  3. Hurricane Sandy Tested

    Posted by Wayne S on 14th Nov 2012

    Installed the 8Kw generator Feb 2012. Installation was straight forward and Norwall Power systems was very easy to purchase from.
    When hurricane Sandy hit in NJ, our power was out for 10 days. The Generac generator performed flawlessly and didn't miss a beat for over 200 hours. This is probably the best investment I've made in a very long time.

  4. Let the storms come, I am ready

    Posted by Karen J. on 13th Jun 2012

    I am a single senior and just purchased the Generac Model 5870. Don't have to worry any more about the power going off. I have gone through 3 back up sump pump systems. Now I have peace of mind. Thank you for great service.

  5. Great generator

    Posted by Mike Saunders on 1st Feb 2012

    I ordered The Generac Guardian 8kW Standby Generator Pre-packed w/100 Amp-10 Circuit ATS Model #5870 from Norwall PowerSystems on Thursday and it was delivered bright and early Monday morning. This was last year. Since then we have gone through 2 hurricanes, 3 backouts and many storms with it. It is like a part of our family- keeping us safe, comfortable and with electricity!! Thank you for your great service and quality products Norwall.

  6. Happy customer

    Posted by Calvin T Jr. on 25th Jan 2012

    Since buying the Generac Guardian 8 kW generator we are very happy with our purchase. I spent a great amount of time looking at the options and finally decided on the 5870- first because of price but also because I know the company I was buying it from had a great reputation and stood behind their product.

    I debated having a technician come in to do the installation but ended up doing it myself one weekend. I work as a mechanic and electricity is my professional background so I was up to the challenge. The total install, including the gas line took me about 10 hours which isn?t too bad for never having hooked up a generator before. To this day we have not been without electrical power in our home. I cannot even begin to imagine the chaos that would go on with 4 kids and 2 dogs. Sincerely, The Locus family and 2 dogs.

  7. Great Deal

    Posted by Robert K on 24th Jan 2012

    I would recommend this product to everyone in search of peace of mind.

  8. Anyone who lives in a cold area needs a generator

    Posted by Sandra on 21st Jan 2012

    We bought our generator last year. Unfortunately it came after a big storm that killed our power for 2 days. We decided to wait until after the storm to hook it up but since then we have had nothing but good experiences with it.

  9. Everything was easy

    Posted by Jack on 20th Jan 2012

    This was a very easy transaction. The generator arrived in only 4 days (via lift gate truck), much sooner than anticipated. The generator was securely strapped on a pallet and the driver placed it where required. Everything was as advertised and I?m very pleased with Norwall's product and expertise.

  10. Best deal for the money

    Posted by Robert K on 13th Jan 2012

    If you need a reliable generator for a fair price this is the one. Cant beat it.

Showing reviews 1-10 of 15 | Next