Current Generac Mobile Stationary Generators

2025 Generac Mobile Stationary Generators SG045

2025 Generac Mobile Stationary Generators SG045

Swipe to View More

  • Year 2025
  • Make Generac Mobile
  • Model Stationary Generators
Shop Generac Mobile Pre-Owned
Product Details Specifications Photos
2025 Generac Mobile Stationary Generators SG045

2025 Generac Mobile Stationary Generators SG045

  • Year 2025
  • Manufacturer Generac Mobile
  • Model Name Stationary Generators
  • Trim Name SG045
  • Generic Type (Primary) General
  • Engine Manufacturer Generac
  • Cylinder Liners 4
  • Engine Type In-Line
  • Displacement 270.4 in (4.43 L)
  • Bore 4.5 in (114.3 mm)
  • Stroke 4.25 in (107.95 mm)
  • Compression Ratio 9.94:1
  • Ignition Coil Near Plug Solid State Inductive
  • Cooling Type: Pressurized Closed | Closed Coolant Recovery System | UV/Ozone Resistant Hoses | Factory-Installed Radiator | 50/50 Ethylene Glycol Antifreeze | Radiator Drain Extension
  • Engine Power Horsepower at Rated kW: 69 hp | Single-Phase 120/240 VAC @1.0pf: 45 kW/45 kVA / 188 Amps | Three-Phase 120/208 VAC @0.8pf: 45 kW/56 kVA / 156 Amps | Three-Phase 120/240 VAC @0.8pf: 45 kW/56 kVA / 135 Amps | Three-Phase 277/480 VAC @0.8pf: 45 kW/56 kVA / 68 Amps
  • Intake Design Intake Air Method: Naturally Aspirated
  • Governor Electronic

2025 Generac Mobile Stationary Generators SG045

Keep all your business’s essentials up and running with a Generac 45kW generator. Take advantage of a durable enclosure that utilizes the highest level of noise reduction and weather resistance. Our natural gas generators provide the power you need with easy maintenance. Generac is one of North America’s largest suppliers of power generation equipment. For more than five decades, Generac has designed and manufactured diesel, natural gas, and bi-fuel generators that meet the demands of any application.

Features may include:

Spark-Ignited Engine
  • Generac builds its spark-ignited engines from the block up utilizing advanced engineering expertise.
POWERZONE® Controller
  • Generac engineers its generator controls with safety and convenience as top priorities.
Generator Enclosure
  • Generac manufactures its own enclosures, ensuring each unit combines the highest level of durability, noise reduction, weather resistance, and streamlined design.
Industrial Alternator
  • Generac industrial alternators are machine wound, machine inserted, and machine varnished for the ultimate in consistency.

Engine

Engine Manufacturer Generac
Cylinder Liners 4
Engine Type In-Line
Displacement 270.4 in (4.43 L)
Bore 4.5 in (114.3 mm)
Stroke 4.25 in (107.95 mm)
Compression Ratio 9.94:1
Ignition Coil Near Plug Solid State Inductive
Cooling Type: Pressurized Closed | Closed Coolant Recovery System | UV/Ozone Resistant Hoses | Factory-Installed Radiator | 50/50 Ethylene Glycol Antifreeze | Radiator Drain Extension
Engine Power Horsepower at Rated kW: 69 hp | Single-Phase 120/240 VAC @1.0pf: 45 kW/45 kVA / 188 Amps | Three-Phase 120/208 VAC @0.8pf: 45 kW/56 kVA / 156 Amps | Three-Phase 120/240 VAC @0.8pf: 45 kW/56 kVA / 135 Amps | Three-Phase 277/480 VAC @0.8pf: 45 kW/56 kVA / 68 Amps
Intake Design Intake Air Method: Naturally Aspirated
Governor Electronic

Fuel System

Fuel Type Natural Gas, Propane
Fuel System Control: Down Draft | Shutoff: Dual | NPT Fuel Connection on Frame | Primary and Secondary Fuel Shutoff
Fuel Usage, 100% Load Natural Gas 25%: 195 scfh (5.5 m3/hr) | Natural Gas 50%: 322 scfh (5.5 m3/hr) | Natural Gas 75%: 427 scfh (12.1 m3/hr) | Natural Gas 100%: 554 scfh (15.7 m3/hr) | LP Vapor 25%: 02 scfh (2.9 m3/hr) | LP Vapor 50%: 147 scfh (4.2 m3/hr9 | LP Vapor 75%: 184 scfh (5.2 m3/hr) | LP Vapor 100%: 228 scfh (6.5 m3/hr)

Battery

Battery Size: See Battery Index 0161970SBY | Voltage: 12 VDC
Battery Charger Input Standard

Electric

Electrical System Voltage: 12 VDC | Ground Polarity: Negative (-)
Alternator Standard Model: K0045124Y21 | Poles: 4 | Field Type: Revolving | Insulation Class - Rotor: H | Insulation Class - Stator: H | Total Harmonic Distortion (THD): <5% (3-Phase) | Telephone Interference Factor (TIF): <50 | Standard Excitation: Synchronous Brushless | Bearings: Sealed Ball | Coupling: Direct via Flexible Disc | Voltage Regulator Type: Full Digital | Regulation Accuracy (Steady State): ±0.25% | UL2200 GENprotect™ | Class H Insulation Material | 2/3 Pitch | Skewed Stator | Brushless Excitation | Sealed Bearing | Full Load Capacity Alternator

Operational

Operating Conditions Frequency Regulation (Steady State): ± 0.25
Operating Speed Fan: 2,100 RPM | Rated Engine: 1,800 RPM | Piston: 1,275 ft/min (389 m/min)
Operating Temperature, Maximum Maximum Operating Ambient Temperature: 122 °F (50 °C) | Maximum Operating Ambient Temperature (Before Derate): See Bulletin No. 0199270SSD | Exhaust Temperature (Rated Output): 1,361 °F (738 °C)

Hydraulics

Pump Type Oil: Gear Driven
Oil Filter Type: Full-Flow Spin-On Cartridge
Hydraulic Flow Coolant Flow: 37.7 gpm (142.7 Lpm) | Exhaust Flow (Rated Output): 255.3 scfm (7.2 m3/min)
Airflow Air Flow (Fan Air Flow Across Radiator) - Open Set: 3,511 cfm (99.4 m3/min) | Flow at Rated Power: 90.3 cfm (2.6 m3/min )
Maximum Pressure G Operating Fuel: 5 - 14 in H2O (1.2 - 3.5 kPa) | LP Operating Fuel Pressure: 7 - 14 in H2O (1.7 - 3.5 kPa) | Maximum Additional Radiator Backpressure: 0.5 in H2O (0.12 kPa) | BMEP: 113 psi (778 kPa) | Maximum Allowable Back Pressure (Post Silencer): 0.75 inHg (2.54 kPa)

Dimensions

Dimensions Fan Diameter: 20 in (508 mm)
Length Open Set: 78.1 in (1,984 mm) | Weather Protected Enclosure: 94.8 in (2,408 mm) | Level 1 Sound Attenuated Enclosure: 94.8 in (2,408 mm) | Level 2 Sound Attenuated Enclosure: 94.8 in (2,408 mm)
Width Open Set: 37.3 in (947 mm) | Weather Protected Enclosure: 38.0 in (965 mm) | Level 1 Sound Attenuated Enclosure: 38.0 in (965 mm) | Level 2 Sound Attenuated Enclosure: 38.0 in (965 mm)
Height Open Set: 44.4 in (1,128 mm) | Weather Protected Enclosure: 57.5 in (1,461 mm) | Level 1 Sound Attenuated Enclosure: 57.5 in (1,461 mm) | Level 2 Sound Attenuated Enclosure: 57.5 in (1,461 mm)

Capacities

Oil capacity Oil: 21 qt (20 L)
Cooling System Coolant System Capacity: 3 gal (11.4 L)

Weights

Weight Open Set: 1,675 - 1,748 lbs (760 - 793 kg) | Weather Protected Enclosure Steel: 2,160 - 2,233 lbs (980 - 1,013 kg) | Weather Protected Enclosure Aluminum: 1,894 - 1,965 lbs (859 - 891 kg) | Level 1 Sound Attenuated Enclosure Steel: 2,258 - 2,329 lbs (1,024 - 1,056 kg) | Level 1 Sound Attenuated Enclosure Aluminum: 1,987 - 2,061 lbs (901 - 935 kg) | Level 2 Sound Attenuated Enclosure Steel: 2,341 - 2,414 lbs (1,062 - 1,095 kg) | Level 2 Sound Attenuated Enclosure Aluminum: 2,071 - 2,144 lbs (939 - 972 kg)

Features

Features Fan Type: Pusher | Number of Main Bearings: 5 | Lifter Type: Hydraulic | Oil Drain Extension | Air Cleaner | Fan Guard | Factory Filled Oil and Coolant | Oil Temperature Sender with Alarm | Air Filter Restriction Indicator | Heavy Duty Air Cleaner | Battery Charging Alternator | Battery Cables | Battery Tray | Rubber-Booted Engine Electrical Connections | Solenoid Activated Starter Motor | Internal Genset Vibration Isolation | Separation of Circuits - High/Low Voltage | Separation of Circuits - Multiple Breakers | Wrapped Exhaust Piping | Standard Factory Testing |
Construction Material Connecting Rods: Forged Steel, Fractured Split, Bushingless | Cylinder Head: Cast Iron | Cylinder Liners: Cast Iron | Piston Type Cast: Aluminum Flat Top | Crankshaft Type: Forged Steel | Intake Valve Material: Stainless Steel | Exhaust Valve Material: Stainless Steel | Hardened Valve Seats: High Steel Iron Alloy | Stainless Steel Flexible Exhaust Connection

Warranty

Warranty 2 Year Limited Warranty (Standby and Demand Response Rated Units) | 1 Year Limited Warranty (Prime Rated Units)

Product Photography