2025 Generac Mobile Stationary Generators SG250
- Year 2025
- Make Generac Mobile
- Model Stationary Generators
2025 Generac Mobile Stationary Generators SG250
2025 Generac Mobile Stationary Generators SG250
Keep all your business’s essentials up and running with a Generac 250kW generator. These gas generators are powered by a reliable underground pipeline network that is rarely impacted by weather-related events. Everything can continue to operate effortlessly until power is restored. 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:
Generator 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.
- Generac's Modular Power Systems (MPS) boast a rate of up to 99.999% reliability, and are more cost-effective and flexible than single generators with the same load capacity.
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: 375 hp / 337 hp | Standby-Demand Response/Prime Three-Phase 120/208 VAC @0.8pf: 250 kW/313 kVA, 868 Amps / 225 kW/281 kVA, 782 Amps | Standby-Demand Response/Prime Three-Phase 120/240 VAC @0.8pf: 250 kW/313 kVA, 753 Amps / 225 kW/281 kVA, 677 Amps | Standby-Demand Response/PrimeThree-Phase 277/480 VAC @0.8pf: 250 kW/313 kVA, 376 Amps / 225 kW/281 kVA, 339 Amps | Standby-Demand Response/PrimeThree-Phase 346/600 VAC @0.8pf: 250 kW/313 kVA, 301 Amps / 225 kW/281 kVA, 271 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%: 1,020 scfh (28.9 m3/hr) / 990 scfh (28.0 m3/hr) | Standby-Demand Response/Prime 50%: 1,620 scfh (45.9 m3/hr) / 1,260 scfh (35.7 m3/hr) | Standby-Demand Response/Prime 75%: 2,520 scfh (71.4 m3/hr) / 1,980 scfh (56.1 m3/hr) | Standby-Demand Response/Prime 100%: 3,180 scfh (90.0 m3/hr) / 2,700 scfh (76.5 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: K0250124Y21 | Poles: 4 | Field Type: Revolving | Insulation Class - Rotor: H | Insulation Class - Stator: H | Total Harmonic Distortion: <5% | Telephone Interference Factor (TIF): <50Standard Excitation: Permanent Magnet | Bearings. Single Sealed Ball | Coupling: Direct via Flexible Disc | Voltage Regulator Type: Full Digital | Regulation Accuracy (Steady State): ±0.25%
Operational
Operating Conditions
Frequency Regulation (Steady State): ±0.25%
Operating Speed
Fan: 1,894 RPM | Standby-Demand Response/Prime Piston: 1,950 ft/min (594 m/min) / 1,950 ft/min (594 m/min)
Operating Temperature, Maximum
Standby-Demand Response/Prim Exhaust Temp (Rated Output - Post Silencer): 1,357 °F (736 °C) / 1,340 °f (727 °C)
Hydraulics
Pump Type
Oil: Gear
Oil Filter
Type: Full Flow Spin-On Cartridge
Hydraulic Flow
Standby-Demand Response/Prime Coolant Flow: 90 gpm (340.7 Lpm) / 90 gpm (340.7 Lpm)
Airflow
Standby-Demand Response/Prime Flow at rated power: 506 cfm (14.3 m3/min) / 455 cfm (12.9 m3/min) | Standby-Demand Response/Prime Exhaust Flow (Rated Output):1,703 cfm (48 m3/min) / 1,517 cfm (43 m3/min)
Maximum Pressure
Operating Fuel Pressure: 7 - 11 in H2O (1.7 - 2.7 kPa) | Standby-Demand Response/Prime BMEP: 190 psi (1,313 Kpa) / 171 psi (1,182 kPa) | Standby-Demand Response/Prim Max. Backpressure (Post Silencer): 0.75 inHg (2.54 Kpa) / 0.75 inHg (2.54 Kpa)
Dimensions
Dimensions
Fan Diameter: 30 in (762 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): 5,883 - 6,031 lbs (2,668 - 2,735 kg) | Weather Protected Enclosure Steel: 7,448 - 7,596 lbs (3,378 - 3,445 kg) | Weather Protected Enclosure Aluminum: 6,654 - 6,801 lbs (3,018 - 3,084 kg) | Level 1 Sound Attenuated Enclosure Steel: 7,911 - 8,059 lbs (3,588 - 3,655 kg) | Level 1 Sound Attenuated Enclosure Aluminum: 6,853 - 7,000 lbs (3,108 - 3,175 kg) | Level 2 Sound Attenuated Enclosure Steel: 8,484 - 8,632 lbs (3,848 - 3,915 kg) | Level 2 Sound Attenuated Enclosure Aluminum: 7,099 - 7,247 lbs (3,220 - 3,287 kg) | Level 3 Sound Attenuated Enclosure: 10,840 - 10,990 lbs (4,916 - 4,984 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 Breakers | 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 | Cylinder Liners: Ductile Iron | Piston Type: Aluminum | 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)