2025 Generac Mobile Stationary Generators SG040
- Year 2025
- Make Generac Mobile
- Model Stationary Generators
2025 Generac Mobile Stationary Generators SG040
2025 Generac Mobile Stationary Generators SG040
Keep all your business’s essentials up and running with a Generac 40kW 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.
- Generac engineers its generator controls with safety and convenience as top priorities.
- Generac manufactures its own enclosures, ensuring each unit combines the highest level of durability, noise reduction, weather resistance, and streamlined design.
- 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 in3 (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 | Coolant Flow: 37.7 gpm (142.7 Lpm)
Engine Power
Horsepower at Rated kW: 61 hp | Single-Phase 120/240 VAC @1.0pf: 40 kW/40 kVA / 167 Amps | Three-Phase 120/208 VAC @0.8pf: 40 kW/50 kVA / 139 Amps | Three-Phase 120/240 VAC @0.8pf: 40 kW/50 kVA / 120 Amps | Three-Phase 277/480 VAC @0.8pf: 40 kW/50 kVA / 60 Amps | Three-Phase 346/600 VAC @0.8pf :40 kW/50 kVA / 48 Amps
Intake Design
Intake Air Method: Naturally Aspirated
Governor
Electronic
Fuel System
Fuel Type
Natural Gas, Propane
Fuel System
Fuel Control: Electronic | Fuel Shut Off: Dual | NPT Flexible Fuel Line | Dual Fuel NG/LPV | Dual Fuel NG/LPL
Fuel Usage, 100% Load
Natural Gas 100%: 495 scfh (14.0 m3/h= | Natural Gas 75%: 394 scfh (11.2 m3/hr) | Natural Gas 50%: 298 scfh (8.4 m3/hr) | Nautral Gas 25%: 195 scfh (5.5 m3/hr) | Propane 100%: 209 scfh (5.9 m3/hr) | Propane 75%: 172 scfh (4.9 m3/hr) | Propane 50%: 138 scfh (3.9 m3/hr) | Propane 25%: 209 scfh (m3/hr)
Battery
Battery
Size: See Battery Index 0161970SBY | Voltage: 12 VDC
Battery Charger Input
Standard | 10A UL
Electric
Electrical
System Voltage: 12 VDC | Ground Polarity: Negative (-)
Alternator
Standard Model: K0040124Y21 | Poles: 4 | Field Type: Revolving | Insulation Class - Rotor: H | Insulation Class - Stator: H | Total Harmonic Distortion (THD): <5% (3-Phase Only) | Telephone Interference Factor (TIF): <50 | Standard Excitation: Synchronous Brushless | Bearings: Sealed Ball | Coupling: Direct via Flexible Disc | Voltage Regulator Type: Full Digital | Number of Sensed Phases: All | Regulation Accuracy (Steady State): ±0.25% | Alternator Upsizing | Anti-Condensation Heater | Tropical Coating
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
Ambient: 122 °F (50 °C) | Ambient (Before Derate): See Bulletin No. 0199270SSD | Exhaust Temp (Rated Output): 1,354 °F (734 °C)
Performance
Noise Level
100 dB Alarm Horn
Hydraulics
Pump Type
Oil: Gear Driven
Oil Filter
Type: Full-Flow Spin-On Cartridge
Hydraulic Flow
Flow at Rated Power: 81.2 cfm (2.3 m3/min) | Exhaust Flow (Rated Output): 234.2 cfm (6.6 m3/min)
Airflow
Air Flow (Fan Air Flow Across Radiator) - Open Set: 3,511 cfm (99.4 m3/min)
Maximum Pressure
Operating Fuel Pressure (NG): 5 - 14 in H2O(1.2 - 3.5 kPa) | Operating Fuel Pressure (LP): 7 - 14 in H2O (1.7 - 3.5 kPa) | Maximum Additional Radiator Backpressure: 0.5 in H2O (0.12 kPa) | BMEP: 83 psi (572 kPa) | Maximum Exhaust 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
Crankcase Capacity: 21 qt (20 L)
Cooling 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
Number of Main Bearings: 5 | Lifter Type: Hydraulic | Fan Type: Pusher | Heater with Shutoff Valves | Fluid Containment Pan | Engine Coolant Heater | Oil Heater | Level 1 Fan and Belt Guards (Enclosed Units Only) | Radiator Duct Adapter (Open Set Only) | Battery Warmer | Main Line Circuit Breaker | 2nd Main Line Circuit Breaker | 3rd Main Line Circuit Breaker | Shunt Trip and Auxiliary Contact | Electronic Trip Breakers | Extended Factory Testing (3-Phase Only) | 8 Position Load Center | Weather Protected Enclosure | Level 1 Sound Attenuated | Level 2 Sound Attenuated | Level 2 Sound Attenuated with Motorized Dampers | AC/DC Enclosure Lighting Kit | Enclosure Heaters (with Motorized Dampers Only | Door Open Alarm Horn | NFPA 110 Compliant 21-Light Remote Annunciato | Remote Relay Assembly (8 or 16) | Remote E-Stop (Break Glass-Type, Surface Mount) | Remote E-Stop (Red Mushroom-Type, Surface Mount) | Remote E-Stop (Red Mushroom-Type, Flush Mount) | 10A Engine Run Relay | Ground Fault Annunciator | 120 V GFCI and 240 V Outlets | Damper Alarm Contacts (with Motorized Dampers Only)
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 | Steel Enclosure | Aluminum Enclosure
Warranty
Warranty
Standby Gensets Only: 2 Year Extended Limited Warranty, 5 Year Extended Limited Warranty, 7 Year Extended Limited Warranty, 10 Year Extended Limited Warranty