2025 Generac Mobile Stationary Generators MG250

Information

2025 Generac Mobile Stationary Generators MG250

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:

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

Photos

Highlights

  • Muncy, Pennsylvania
  • 2025
  • Generac Mobile
  • Stationary Generators MG250
  • Natural Gas
  • Available
  • 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)
  • 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)

Specifications

  • 2025
  • Generac Mobile
  • Stationary Generators
  • MG250
  • General
  • Generac
  • 6
  • In-line
  • 864.71 in3 (14.2 L)
  • 5.31 in (135 mm)
  • 6.50 in (165 mm)
  • 9.5:1
  • Air Method: Turbocharged/Aftercooled
  • Electronic
  • Electronic
  • Pressurized Closed Recovery | Closed Coolant Recovery System | UV/Ozone Resistant Hoses | Factory-Installed Radiator | 50/50 Ethylene Glycol Antifreeze | Radiator Drain Extension
  • 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 277/480 VAC @0.8pf: 250 kW/313 kVA, 376 Amps / 225 kW/281 kVA, 339 Amps | Standby-Demand Response/Prime Three-Phase 346/600 VAC @0.8pf: 250 kW/313 kVA, 301 Amps / 225 kW/281 kVA, 271 Amps
  • Standby-Demand Response/Prime: 1,800 RPM / 1,800 RPM
  • Carburetor: Down Draft | NPT Fuel Connection on Frame | Primary and Secondary Fuel Shutoff
  • Natural Gas
  • 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)
  • Size: See Battery Index 0161970SBY | Voltage: (2) - 12 VDC
  • Alternator: 57.5 A
  • System Voltage: 24 VDC | Ground Polarity: Negative (-)
  • Standard Model: K0250124Y21 | Poles: 4 | Field Type: Revolving | Insulation Class - Rotor: H | Insulation Class - Stator: H | Total Harmonic Distortion: <5% | Telephone Interference Factor (TIF): <50 | Standard Excitation: Permanent Magnet | Bearings: Single Sealed Ball | Coupling. Direct via Flexible Disc | Voltage Regulator Type: Full Digital | Regulation Accuracy (Steady State): ±0.25% | UL2200 GENprotect™ | Motorized Main Line Circuit Breaker | Class H Insulation Material | 2/3 Pitch | Skewed Stator | Permanent Magnet Excitation | Sealed Bearing | Amortisseur Winding | Full Load Capacity Alternator
  • Frequency Regulation (Steady State): ±0.25%
  • Fan: 1,894 RPM | Standby-Demand Response/Prime Piston: 1,950 ft/min (594 m/min) / 1,950 ft/min (594 m/min)
  • 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 | Exhaust Temp (Rated Output - Post Silencer): 1,357 °F (736 °C) / 1,340 °F (727 °C)
  • Oil: Gear
  • Type: Full Flow Cartridge
  • Standby-Demand Response/Prime Coolant Flow: 90 gpm (340.7 Lpm) / 90 gpm (340.7 Lpm)
  • Standby-Demand Response/Prime Air Flow (Fan Air Flow Across Radiator): 10,078 scfm (285.4 m3/min) / 10,078 scfm (285.4 m3/min) | Standby-Demand Response/Prime Flow at rated power: 506 scfm (14.3 m3/min) / 455 scfm (12.9 m3/min) | Standby-Demand Response/Prime Exhaust Flow (Rated Output): 1,703 scfm (48 m3/min) / 1,517 scfm (43 m3/min)
  • 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) | BMEP: 190 psi (1,313 kPa) / 171 psi (1,182 kPa) | Standby-Demand Response/Prime Max. Backpressure (Post Silencer): 0.75 inHg (2.54 kPa) / 0.75 inHg (2.54 kPa)
  • Fan Diameter: 30 in (762 mm)
  • 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)
  • 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)
  • 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)
  • Engine. 36.2 qt (34.3 L)
  • Standby-Demand Response/Prime Coolant System Capacity: 15 gal (54.9 L) / 15 gal (54.9 L)
  • Open Set (Includes Exhaust Flex): 5,883 - 6,031 lb (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 Steel: 10,840 - 10,990 lbs (4,916 - 4,984 kg)
  • Number of Main Bearings: 7 | Lifter Type: Solid | Fan Type: Pusher | Oil Drain Extension | Engine Coolant Heater | Air Cleaner | Factory Filled Oil and Coolant | Radiator Duct Adapter (Open Set Only) | Critical Silencer (Open Set Only) | Oil Temperature Indication and Alarm | Battery Charging Alternator | Battery Cables | Battery Tray | 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)
  • Connecting Rods: Steel Alloy | Cylinder Head: Cast Iron | 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 | Rubber-Booted Engine Electrical Connections
  • 2 Year Limited Warranty (Standby and Demand Response Rated Units) | 1 Year Limited Warranty (Prime Rated Units)