2025 Generac Mobile Stationary Generators SG275
- Year 2025
- Make Generac Mobile
- Model Stationary Generators
2025 Generac Mobile Stationary Generators SG275
2025 Generac Mobile Stationary Generators SG275
Keep all your business’s essentials up and running with a Generac 275kW generator. Take advantage of a durable enclosure that utilizes the highest level of noise reduction. All of our industrial gas generators are completely cost effective and give you the best value for the output so you can afford more of what you need for your business. 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:
Enclosure- Generac manufactures its own enclosures, ensuring each unit combines the highest level of durability, noise reduction, weather resistance, and streamlined design.
- Generac builds its spark-ignited engines from the block up utilizing advanced engineering expertise.
- Generac industrial alternators are machine wound, machine inserted, and machine varnished for the ultimate in consistency.
- The Generac Power Zone® Digital Control Platform is a fully integrated and multipurpose family of controllers for Generac’s single genset and Modular Power Systems (MPS) applications.
Engine
Engine Manufacturer
Generac
Cylinder Liners
6
Engine Type
In-line
Displacement
864.71 in3 (14.2 L)
Bore
5.31 in (135 mm)
Stroke
6.50 in (165 mm)
Compression Ratio
9.5:1
Intake Design
Air Method: Turbocharged/Aftercooled
Ignition
Electronic
Governor
Electronic
Cooling
Pressurized Closed Recovery | Closed Coolant Recovery System | UV/Ozone Resistant Hoses | Factory-Installed Radiator | 50/50 Ethylene Glycol Antifreeze | Radiator Drain Extension
Engine Power
Standby-Demand Response/Prime Horsepower at Rated kW: 409 hp / 369 hp | Standby-Demand Response/Prime Three-Phase 120/208 VAC @0.8pf: 275 kW/343.8 kVA, 955 Amps / 248 kW/309.4 kVA, 860 Amps | Standby-Demand Response/Prime Three-Phase 120/240 VAC @0.8pf: 275 kW/343.8 kVA, 828 Amps/ 248 kW/309.4 kVA, 745 Amps | Standby-Demand Response/Prime Three-Phase 277/480 VAC @0.8pf: 275 kW/343.8 kVA, 414 Amps / 248 kW/309.4 kVA, 373 Amps | Standby-Demand Response/Prime Three-Phase 346/600 VAC @0.8pf: 275 kW/343.8 kVA, 331 Amps / 248 kW/309.4 kVA, 298 Amps
Rated Engine Speed
Standby-Demand Response/Prime: 1,800 RPM / 1,800 RPM
Fuel System
Fuel Type
Natural Gas
Fuel System
Carburetor: Down Draft | NPT Fuel Connection on Frame | Primary and Secondary Fuel Shutoff
Fuel Usage, 100% Load
Standby-Demand Response/Prime 25%: 1,080 scfh (30.6 m3/h4) / 1,020 scfh (28.9 m3/hr) | Standby-Demand Response/Prime 50%: 1,800 scfh (51.0 m3/hr) / 1,620 scfh (45.9 m3/hr) | Standby-Demand Response/Prime 75%: 2,640 scfh (74.8 m3/hr) / 2,400 scfh (68.0 m3/hr) | Standby-Demand Response/Prime 100%: 3,240 scfh (91.7 m3/hr) / 3,000 scfh (84.9 m3/hr)
Battery
Battery
Size: See Battery Index 0161970SBY | Voltage: 24 VDC
Battery Charger Input
Alternator: 57.5 A
Electric
Electrical
System Voltage: 24 VDC | Ground Polarity: Negative (-)
Alternator
Standard Model: K0300124Y21 | Poles: 4 | Field Type: Revolving | Insulation Class - Rotor: H | Insulation Class - Stator: H | Total Harmonic Distortion: <5% (3-Phase) | Telephone Interference Factor (TIF): <50 | Standard Excitation: Permanent Magnet | Bearings: Sealed Ball | Coupling: Direct via Flexible Disc | Voltage Regulator Type: Full Digital | Regulation Accuracy (Steady State): ±0.25% | UL2200 GENprotect™ | Class H Insulation Materia | 2/3 Pitch | Skewed Stator | Permanent Magnet Excitation | Sealed Bearing | Amortisseur Winding | Full Load Capacity Alternator
Operational
Operating Conditions
Frequency Regulation (Steady State): ±0.25%
Operating Speed
Fan: 1,894 RPM | Piston: 1,950 ft/min (594 m/min) / 1,950 ft/min (594 m/min)
Operating Temperature, Maximum
Standby-Demand Response/Prime Maximum Operating Ambient Temperature: 122 °F (50 °C) / 122 °F (50 °C) | Standby-Demand Response/Prime Maximum Operating Ambient Temperature (Before Derate). See Bulletin No. 0199270SSD /See Bulletin No. 0199270SSD | Standby-Demand Response/Prime Exhaust Temp (Rated Output - Post Silencer): 1,385 °F (752 °C) / 1,355 °F (735 °C)
Hydraulics
Pump Type
Oil: Gear
Oil Filter
Type: Full Flow with Cartridge
Hydraulic Flow
Standby-Demand Response/Prime Coolant Flow: 90 gpm (340.7 Lpm) / 90 gpm (340.7 Lpm)
Airflow
Standby-Demand Response/Prime Air Flow (Fan Air Flow Across Radiator): 15,946 cfm (452 m3/min) / 15,946 cfm (452 m3/min) | Exhaust Flow (Rated Output): 1,985 cfm (56 m3/min) / 1,670 cfm (47 m3/min)
Maximum Pressure
Operating Fuel Pressure: 7 - 11 in H2O (1.7 - 2.7 kPa) | Standby-Demand Response/Prime Maximum Additional Radiator Backpressure: 0.5 in H2O (0.12 kPa) / 0.5 in H2O (0.12 kPa) | Standby-Demand Response/Prime BMEP: 208 psi (1,433 kPa) / 187 psi (1,292 kPa) | Standby-Demand Response/Prime Max. Backpressure (Post Silencer): 0.75 inHg (2.54 kPa) / 0.75 inHg (2.54 kPa)
Dimensions
Dimensions
Fan Diameter. 34 in (864 mm)
Length
Open Set (Includes Exhaust Flex): 136.0 in (3,454 mm) | Weather Protected Enclosure: 174.7 in (4,437 mm) | Level 1 Sound Attenuated Enclosure: 200.2 in (5,085 mm) | Level 2 Sound Attenuated Enclosure: 180.6 in (4,587 mm) | Level 3 Sound Attenuated Enclosure: 207.3 in (5,265 mm)
Width
Open Set (Includes Exhaust Flex): 57.1 in (1,450 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) | Level 3 Sound Attenuated Enclosure: 63.7 in (1,618 mm)
Height
Open Set (Includes Exhaust Flex): 67.9 in (1,725 mm) | Weather Protected Enclosure: 77.8 in (1,976 mm) | Level 1 Sound Attenuated Enclosure: 77.8 in (1,976 mm) | Level 2 Sound Attenuated Enclosure: 111.3 in (2,827 mm) | Level 3 Sound Attenuated Enclosure: 128.9 in (3,274 mm)
Capacities
Oil capacity
Engine: 36.2 qt (34.3 L)
Cooling System
Standby-Demand Response/Prime Coolant Capacity: 15 gal (54.9 L) / 15 gal (54.9 L)
Weights
Weight
Open Set (Includes Exhaust Flex): 6,200 - 6,587 lbs (2,812 - 2,987 kg) | Weather Protected Enclosure Steel: 7,535 - 7,919 lbs (3,417 - 3,591 kg) | Weather Protected Enclosure Aluminum: 6,978 - 7,359 lbs (3,165 - 3,337 kg) | Level 1 Sound Attenuated Enclosure Steel: 7,770 - 8,273 lbs (3,524 - 3,752 kg) | Level 1 Sound Attenuated Enclosure Aluminum: 7,176 - 7,625 lbs (3,254 - 3,458 kg) | Level 2 Sound Attenuated Enclosure Steel: 8,804 - 9,188 lbs (3,993 - 4,167 kg) | Level 2 Sound Attenuated Enclosure Aluminum: 7,423 - 7,870 lbs (3,366 - 3,569 kg) | Level 3 Sound Attenuated Enclosure: 10,718 - 11,080 lbs (4,861 - 5,025 kg)
Features
Features
Number of Main Bearings: 7 | Lifter Type: Solid | Fan Type: Pusher | Oil Drain Extension | Air Cleaner | Fan Guard (Open Sets Only) | Factory Filled Oil and Coolant | Radiator Duct Adapter (Open Set Only) | Critical Silencer (Enclosed Units Only) | Oil Temperature Indication and Alarm | 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 Breaker | Wrapped Exhaust Piping | Standard Factory Testing | Silencer Mounted in the Discharge Hood (Enclosed Units Only) | Ready to Accept Full Load in <10 Seconds
Construction Material
Connecting Rods: Steel Alloy | Cylinder Head: Cast Iron GT250, OHV | Cylinder Liners: Ductile Iron | Piston Type: Aluminum Alloy | Crankshaft Type: Ductile Iron | Intake Valve Material: Special Heat-Resistant Steel | Exhaust Valve Material: High Temperature Steel Alloy | Hardened Valve Seats: High Temperature Steel 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)