Generac Guardian Series 16/20/22 kW

Residential Standby Generators

Air-Cooled Gas Engine

What's Included:

Standby Power Ratings

Model Rating (kW)
G007035-0, G007035-1 (Aluminum - Bisque) 16 kW 60 Hz
G007036-0, G007036-1 (Aluminum - Bisque) 16 kW 60 Hz
G007037-0, G007037-1 (Aluminum - Bisque) 16 kW 60 Hz
G007038-0, G007038-1 (Aluminum - Bisque) 20 kW 60 Hz
G007039-0, G007039-1 (Aluminum - Bisque) 20 kW 60 Hz
G007042-0, G007042-1, G007042-2 (Aluminum - Bisque) 22 kW 60 Hz
G007043-0, G007043-1, G007043-2 (Aluminum - Bisque) 22 kW 60 Hz

The Generac Guardian Series features an air-cooled gas engine generator. It is UL and CUL listed, with Quiet-Test™ capability.

Key Features

Innovative Engine Design & Rigorous Testing

Generac's G-Force engine lineup is designed for reliability and extended run times in demanding conditions. The engines feature plateau honed cylinder walls and plasma moly rings for cooler operation, reduced oil consumption, and longer life. Rigid construction and added durability ensure long engine life. Pressurized lubrication provides better performance and less maintenance, with up to a 2-year/200-hour oil change interval. Shutdown protection prevents catastrophic engine damage due to low oil or overheating.

True Power™ Electrical Technology

This technology provides superior harmonics and a sine wave form with less than 5% Total Harmonic Distortion (THD), delivering utility-quality power. This enables confident operation of sensitive electronic equipment and micro-chip based appliances, such as variable speed HVAC systems.

Test Criteria

  • ✔️ Prototype Tested
  • ✔️ System Torsional Tested
  • ✔️ NEMA MG1-22 Evaluation Motor Starting Ability

Solid-State, Frequency Compensated Voltage Regulation

This advanced system provides optimized FAST RESPONSE to changing load conditions and MAXIMUM MOTOR STARTING CAPABILITY by electronically torque-matching surge loads to the engine. Digital voltage regulation maintains voltage within ±1%.

Single Source Service Response

Generac's extensive dealer network provides parts and service expertise for the entire unit, ensuring comprehensive support.

Generac Transfer Switches

Generac power systems are offered with their own transfer systems and controls, ensuring total system compatibility, long life, and reliability.

Generac is committed to quality, with products Engineered & Built in the USA using domestic and foreign parts. They offer a 5 Year Limited Warranty and 24/7 365 Customer Care.

Specifications

Generator

Specification G007035-0/-1, G007036-0/-1, G007037-0/-1 (16 kW) G007038-0/-1, G007039-0/-1 (20 kW) G007042-0/-1/-2, G007043-0/-1/-2 (22 kW)
Model - - -
Rated maximum continuous power capacity (LP) 16,000 Watts* 20,000 Watts* 22,000 Watts*
Rated maximum continuous power capacity (NG) 16,000 Watts* 18,000 Watts* 19,500 Watts*
Rated voltage 240 240 240
Rated maximum continuous load current - 240 volts (LP/NG) 66.7/66.7 83.3/75.0 91.7/81.3
Total Harmonic Distortion Less than 5% Less than 5% Less than 5%
Main line circuit breaker 70 amp 90 amp 100 amp
Phase 1 1 1
Number of rotor poles 2 2 2
Rated AC frequency 60 Hz 60 Hz 60 Hz
Power factor 1.0 1.0 1.0
Battery requirement (not included) 12 Volts, Group 26R 540 CCA minimum or Group 35AGM 650 CCA minimum
Unit weight (lb/kg) 409/186 448/203 466/211
Dimensions (L x W x H) in / cm 48 x 25 x 29 / 121.9 x 63.5 x 73.7 48 x 25 x 29 / 121.9 x 63.5 x 73.7 48 x 25 x 29 / 121.9 x 63.5 x 73.7
Sound output in dB(A) at 23 ft (7 m) at normal load** 67 67 67
Sound output in dB(A) at 23 ft (7 m) in Quiet-Test™ mode** 55 55 57
Exercise duration 5 min 5 min 5 min

Engine

Specification Details
Engine type GENERAC G-Force 1000 Series
Number of cylinders 2
Displacement 999 cc
Cylinder block Aluminum w/ cast iron sleeve
Valve arrangement Overhead valve
Ignition system Solid-state w/ magneto
Governor system Electronic
Compression ratio 9.5:1
Starter 12 VDC
Oil capacity including filter Approx. 1.9 qt/1.8 L
Operating rpm 3,600
Fuel consumption (Natural gas) 1/2 Load: 218 ft³/hr (6.17 m³/hr)
Full Load: 309 ft³/hr (8.75 m³/hr)
Fuel consumption (Liquid propane) 1/2 Load: 74 ft³/hr (2.03 gal/hr) [7.70 L/hr]
Full Load: 107 ft³/hr (2.94 gal/hr) [11.11 L/hr]

Controls

Feature Description
Two-line plain text multilingual LCD Simple user interface for ease of operation.
Mode buttons: AUTO, MANUAL, OFF Automatic start on utility failure. 7 day exerciser.
Ready to Run/Maintenance messages Standard
Engine run hours indication Standard
Programmable start delay Standard (programmable by dealer only)
Utility Voltage Loss/Return to Utility From 140-171 V / 190-216 V
Future Set Capable Exerciser/Exercise Set Error warning Standard
Run/Alarm/Maintenance logs 50 events each
Engine start sequence Cyclic cranking: 16 sec on, 7 sec rest (90 sec maximum duration).
Starter lock-out Starter cannot re-engage until 5 sec after engine has stopped.
Smart Battery Charger Standard
Charger Fault/Missing AC warning Standard
Low Battery/Battery Problem Protection and Battery Condition indication Standard
Automatic Voltage Regulation with Over and Under Voltage Protection Standard
Under-Frequency/Overload/Stepper Overcurrent Protection Standard
Safety Fused/Fuse Problem Protection Standard
Automatic Low Oil Pressure/High Oil Temperature Shutdown Standard
Overcrank/Overspeed (@ 72 Hz)/rpm Sense Loss Shutdown Standard
High Engine Temperature Shutdown Standard
Internal Fault/Incorrect Wiring protection Standard
Common external fault capability Standard
Field upgradable firmware Standard

Switch Options

Limited Circuits Switch Features

Dimensions (Limited Circuits Switch)
H1 H2 W1 W2 Depth
in 26.75 30.1 10.5 13.5 6.91
cm 67.95 76.45 26.67 34.29 17.55

Wire Ranges: Conductor Lug 1/0 - #14, Neutral Lug 2/0 - #14, Ground Lug 2/0 - #14.

Service Rated Smart Switch Features

Dimensions (Service Rated Smart Switch)
H1 H2 W1 W2 Depth
in 26.75 30.1 10.5 13.5 6.91
cm 67.95 76.45 26.67 34.29 17.55

Wire Ranges: Conductor Lug 350 MCM - #6, Neutral Lug 350 MCM - #6, Ground Lug 2/0 - #14.

Diagrams show dimensions for the Limited Circuits Switch and Service Rated Smart Switch enclosures.

Installation & Connectivity

Installation System

Connectivity (Wi-Fi equipped models only)

Available Accessories

Model # Product Description
G005819-0 26R Wet Cell Battery Generac offers the recommended 26R wet cell battery for use with all air-cooled standby product (excluding PowerPact™).
G007101-0 Battery Pad Warmer Pad warmer rests under the battery. Recommended for use if temperature regularly falls below 0 °F (-18 °C). (Not necessary for use with AGM-style batteries).
G007102-0 Oil Warmer Oil warmer slips directly over the oil filter. Recommended for use if temperature regularly falls below 0 °F (-18 °C).
G007103-1 Breather Warmer Breather warmer is for use in extreme cold weather applications. For use with Evolution controllers only in climates where heavy icing occurs.
G005621-0 Auxiliary Transfer Switch Contact Kit Allows the transfer switch to lock out a single large electrical load that may not be needed. Not compatible with 50 amp pre-wired switches.
G007027-0 Bisque Fascia Base Wrap Kit (Standard on 22 kW) Snaps together around the bottom of the generators, offering a sleek appearance and protection from rodents and insects by covering lifting holes.
G005703-0 Bisque Touch-Up Paint Kit Includes necessary paint to correctly maintain or touch up a generator enclosure if scratched or damaged.
G006485-0 Scheduled Maintenance Kit Provides all items necessary to perform complete routine maintenance on a Generac automatic standby generator (oil not included).
G007005-0 Wi-Fi LP Tank Fuel Level Monitor Provides constant monitoring of the connected LP fuel tank's fuel level. Status alerts notify users when the LP tank needs a refill.
G007000-0 (50 amp)
G007006-0 (100 amp)
Smart Management Module Used to optimize standby generator performance by managing large electrical loads upon startup and shedding them to aid in recovery when overloaded. Can reduce overall system size and cost.
G007169-0 Mobile Link™ 4G LTE Cellular Accessory Allows users to monitor generator status from anywhere in the world via smartphone, tablet, or PC. Access operating status and maintenance alerts. Connect with an authorized service dealer for proactive service.

Dimensions & UPCs

Model UPC
G007035-0 696471070354
G007035-1 696471074161
G007036-0 696471070361
G007036-1 696471074154
G007037-0 696471070378
G007037-1 696471074178
G007038-0 696471070385
G007038-1 696471074185
G007039-0 696471070392
G007039-1 696471074192
G007042-0/-1 696471070442
G007042-2 696471074208
G007043-0/-1 696471070439
G007043-2 696471074215

Diagrams show the left side view with dimensions 637.6 mm [25.1 in] (height) and 1218 mm [48.0 in] (width), and the front view with dimensions 727.2 mm [28.6 in] (height) and 1232 mm [48.5 in] (width). Note: These dimensions are approximate and should not be used for installation purposes; refer to the installation manual for exact dimensions.

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