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Generac Guardian Series 20kW Standby Generator With Grey Aluminum Enclosure - 5887

Abt Model: 5887 | UPC Code: 696471058871
 Discontinued Product This item is no longer available from our website.
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Generac - 5887 - Generators
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True Power Electrical Technology/ Electronic Governor/ Sound Attenuated Enclosure/ Flexible Fuel Line Connector/ Composite Mounting Pad/ Grey Finish/ Transfer Switch Sold Seperatly
Discontinued (details)
Estimation zip code - 20149 edit
MethodEstimated DeliveryCost
Scheduled DeliveryTo be determined$414.07
Scheduled Delivery (White Glove)To be determined$514.07

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Product Details

Generac Guardian Series 20kW Standby Generator With Grey Aluminum Enclosure, Model 5887

One of the most powerful air-cooled generators on the market today, this unit provides whole house power protection for many homes. In addition to essential circuit coverage, the 20 kW unit can back up multiple air conditioners and remaining rooms in your home like home theaters and offices.

Key Features:

  • Transfer Switch Sold Seperatly
  • True Power® Electrical Technology
  • Two Line LCD Tri-lingual Digital Nexus™ Controller
  • Electronic Governor
  • External Main Circuit Breaker, System Status & Maintenance Interval LED Indicators and GFCI Duplex Outlet
  • Sound Attenuated Enclosure
  • Flexible Fuel Line Connector
  • Composite Mounting Pad
  • Base Fascia
  • Natural Gas or LP Gas Operation
  • UL 2200 Listed


  • Innovative Design & Prototype Testing are key components of GENERAC’S success in “IMPROVING POWER BY DESIGN.” But it doesn’t stop there. Total commitment to component testing, reliability testing, environmental testing, destruction and life testing, plus testing to applicable CSA, NEMA, EGSA, and other standards, allows you to choose GENERAC POWER SYSTEMS with the confidence that these systems will provide superior performance.
  • True Power® Electrical Technology
    Superior harmonics and sine wave form produce less than 5% Total Harmonic Distortion for utility quality power. This allows confident operation of sensitive electronic equipment and micro-chip based appliances, such as variable speed HVAC.
  • Solid State, Frequency Compensated Voltage Regulation
    This state-of-the-art power maximizing regulation system is standard on all Generac models. It provides optimized FAST RESPONSE to changing load conditions and MAXIMUM MOTOR STARTING CAPABILITY by electronically torque-matching the surge loads to the engine. An unequalled ±1% voltage regulation.
  • Single Source Service Response
    from Generac’s extensive dealer network provides parts and service know-how for the entire unit, from the engine to the smallest electronic component.
  • Generac Transfer Switches
    Long life and reliability are synonymous with GENERAC POWER SYSTEMS. One reason for this confidence is that the GENERAC product line includes its own transfer systems and controls for total system compatibility.



  • Generac (OHVI) Design
    Maximizes engine “breathing” for increased fuel efficiency. Plateau honed cylinder walls and plasma moly rings help engine run cooler, reducing oil consumption. Because heat is the primary cause of engine wear, the OHVI has a significantly longer life than competitive engines.
  • "Spiny-lok" cast iron cylinder walls
    Rigid construction and added durability provide long engine life.
  • Electronic ignition/spark advance
    These features combine to assure smooth, quick starting every time.
  • Full pressure lubrication system
    Superior lubrication to all vital bearings means better performance, less maintenance and significantly longer engine life. Now featuring a 2 year/200 hour oil change interval.
  • Low oil pressure shutdown system
    Superior shutdown protection prevents catastrophic engine damage due to low oil.
  • High temperature shutdown
    Prevents damage due to overheating.
  • Type of Engine
    Generac OHVI V-Twin
  • Number of Cylinders
  • Displacement
  • Cylinder Block
    Aluminum w/Cast Iron Sleeve
  • Valve Arrangement
    Overhead Valve
  • Ignition System
    Solid-state w/Magneto
  • Governor System
  • Compression Ratio
  • Starter
  • Oil Capacity Including Filter
    Approx. 1.9 Qts/1.8L
  • Operating RPM
  • Fuel Consumption
    • Natural Gas- cu.ft/hr.
      • 1/2 Load 206
      • Full Load 294
    • Liquid Propane ft3/hr (gal/hr) [Liter/hr]
      • 1/2 Load 69(1.89) [7.15]
      • Full Load 106(2.90) [10.98]


  • Revolving field
    Allows for smaller, light weight unit that operates 25% more efficiently than a revolving armature generator.
  • Skewed stator
    Produces a smooth output waveform for compatibility with electronic equipment.
  • Displaced phase excitation
    Maximizes motor starting capability.
  • Automatic voltage regulation
    Regulates the output voltage to ±1% prevents damaging voltage spikes.
  • UL 2200 Listed
    For your safety
  • Rated Maximum Continuous Power Capacity (LP)
    20,000 Watts
  • Rated Maximum Continuous Power Capacity (NG)
    18,000 Watts
  • Rated Voltage
  • Rated Maximum Continuous Load Current – 240 Volts
    83.3 LP/ 75 NG
  • Total Harmonic Distortion
    Less than 5%
  • Main Line Circuit Breaker
    100 Amp
  • Phase
  • Number of Rotor Poles
  • Rated AC Frequency
  • Power Factor
  • Battery Requirement (not included)
    Group 26R 12 Volts and 525 Cold-cranking Amperes Minimum
  • Sound output in dB(A) at 23 ft. with generator operating at normal load
  • Sound output in dB(A) at 23 ft. with generator in Quiet-Test™ low speed exercise mode

Nexus Controls

  • Manual/Auto/Off switch
    Selects the operating mode.
  • Utility voltage sensing
    Constantly monitors utility voltage, setpoints 60% dropout, 80% pick-up, of standard voltage.
  • Generator voltage sensing
    Constantly monitors generator voltage to ensure the cleanest power delivered to the home.
  • Utility interrupt delay
    Prevents nuisance start-ups of the engine, adjustable 10-30 seconds.
  • Engine warm-up
    Ensures engine is ready to assume the load, setpoint approximately 5 seconds.
  • Engine cool-down
    Allows engine to cool prior to shutdown, setpoint approximately 1 minute.
  • Programmable seven day exerciser
    Operates engine to prevent oil seal drying and damage between power outages by running the generator for 12 minutes every week.
  • Smart battery charger
    Delivers charge to the battery only when needed at varying rates depending on outdoor air temperature.
  • Main Line Circuit Breaker
    Protects generator from overload.
  • Electronic governor
    Maintains constant 60 Hz frequency.


  • Aluminum weather protective enclosure
    Provides the ultimate protection against mother nature. Hinged key locking roof panel for security.
    Lift-out front for easy access to all routine maintenance items. Electrostatically applied
    textured epoxy paint for added durability.
  • Enclosed critical grade muffler
    Quiet, critical grade muffler is mounted inside the unit to prevent injuries.
  • Small, compact, attractive
    Makes for an easy, eye appealing installation.
  • SAE
    Sound attenuated enclosure ensures quiet operation.

Approximate Weight:

  • Unit: 451 lbs
  • Shipping: 480 lbs.

Approximate Dimensions:

  • Length: 48"
  • Width: 25"
  • Height: 29"

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): Three Year Limited
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More reasons to buy the Generac 5887 from Abt Electronics
  • is an authorized dealer (Learn More).
  • The Generac 5887 is Brand New.
  • The Generac 5887 Ships in a Factory Sealed Box.
A/C Rated Output60Hz
Starting MethodElectronic Ignition/spark advance
Height (inches)29"
Width (inches)25"
Depth (inches)48"
Warranty3 Years Limited
Generac Guardian Series 20kW Standby Generator With Grey Aluminum Enclosure

Generac Guardian Series 20kW Standby Generator With Grey Aluminum Enclosure


Delivery is subject to reasonable access to the area without damaging the purchaser's property or the product, or jeopardizing the safety of the delivery personnel.

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