2025 Generac Mobile Stationary Generators SD250
- Year 2025
- Make Generac Mobile
- Model Stationary Generators
2025 Generac Mobile Stationary Generators SD250
2025 Generac Mobile Stationary Generators SD250
Key components on these generators are designed and manufactured by Generac, so you know they are tested, tough and proven, with easily available replacement and service parts.
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 industrial alternators are machine wound, machine inserted, and machine varnished for the ultimate in consistency.
- Generac engineers its generator controls with safety and convenience as top priorities.
Engine
Engine Manufacturer
Iveco/FPT
Emissions
EPA Emissions Compliance: Stationary Emergency | EPA Emissions Reference: See Emission Data Sheet
Cylinder Liners
6
Engine Type
In-line | Direct Injection
Displacement
530.91 in3 (8.7 L)
Bore
4.61 in (117 mm)
Stroke
5.31 in (135 mm)
Compression Ratio
16.5:1
Intake Design
Air Method: Turbocharged/Aftercooled
Ignition
Governor
Electronic Isochronous
Cooling
Closed | Closed Coolant Recovery System | UV/Ozone Resistant Hoses | Factory-Installed Radiator | Radiator Drain Extension | 50/50 Ethylene Glycol Antifreeze | 120 VAC Coolant Heater
Engine Power
Horsepower at Rated kW: 389 hp | Three-Phase 120/208 VAC @0.8pf: 250 kW / 867 Amps | Three-Phase 120/240 VAC @0.8pf: 250 kW / 752 Amps | Three-Phase 277/480 VAC @0.8pf: 250 kW / 376 Amps | Three-Phase 346/600 VAC @0.8pf: 250 kW / 301 Amps
Rated Engine Speed
1,800 RPM
Fuel System
Fuel Type
Ultra Low Sulfur Diesel Fuel #2 | Specifications: ASTM
Fuel System
Filtering (Microns): 5 | Fuel Lockoff Solenoid | Primary Fuel Filter
Fuel Injection
Common Rail
Fuel Usage, 100% Load
25%: 5.5 (20.8 Lph) | 50%: 10.4 gph (39.4 Lph) | 75%: 14.8 gph (56.0 Lph) | 100%: 18.5 gph (70.0 Lph)
Battery
Battery
Size: See Battery Index 0161970SBY | Voltage: 12 VDC
Battery Charger Input
Alternator: Standard
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): <50 | Standard Excitation: Permanent Magnet Excitation | Bearings: Single Sealed Cartridge | Coupling: Direct via Flexible Disc | Voltage Regulator Type: Digital | Regulation Accuracy (Steady State): ±0.25% | GENprotect™ | 12 Leads (3-Phase, Non 600V) | Class H Insulation Material | Vented Rotor | 2/3 Pitch | Skewed Stator | Auxiliary Voltage Regulator Power Winding | Permanent Magnet Excitation | Sealed Bearings | Automated Manufacturing (Winding, Insertion, Lacing, Varnishing) | Rotor Dynamically Spin Balanced | Amortisseur Winding | Full Load Capacity Alternator | Protective Thermal Switch
Operational
Operating Conditions
Frequency Regulation (Steady State): ±0.25% | Heat Rejection to Coolant: 682,058 BTU/hr (200 kW)
Operating Speed
Fan: 2,538 RPM | Piston: 1,593 ft/min (486 m3/min)
Operating Temperature, Maximum
Maximum Operating Ambient Temperature: 120 °F (50 °C) | Maximum Operating Ambient Temperature (Before Derate): See Bulletin No. 0199280SSD | Exhaust Temperature (Rated Output): 1,000 °F (538 °C)
Hydraulics
Pump Type
Oil: Gear | Water: Pre-Lubed, Self Sealing | Fuel Inject Make: Electronic | Fuel: Engine Driven Gear
Oil Filter
Type: Full-Flow Cartridge
Hydraulic Flow
Total Fuel Pump Flow (Combustion + Return): 26 gph (98 Lph) | Coolant Flow: 63.3 gpm (240.0 Lpm) | Exhaust Flow (Rated Output): 1,550 cfm (43.9 m3/min)
Airflow
Inlet Air: 8,872 cfm (251 m3/hr) | Flow at Rated Power: 720 scfm (20.4 m3/min)
Maximum Pressure
Maximum Additional Radiator Backpressure: 0.5 in H2O (0.12 kPa) | BMEP: 336 psi (2,289 kPa) | Maximum Allowable Backpressure: 1.5 inHg (5.1 kPa)
Dimensions
Dimensions
Fan Diameter: 30 in (762 mm) | Fuel Supply Line: 0.5 in (12.7 mm) NPT | Fuel Return Line: 0.5 in (12.7 mm) NPT | Fuel Pump Lift : 3 ft (1 m)
Capacities
Oil capacity
Crankcase: 29.6 qt (28.0 L)
Cooling System
Coolant Capacity: 12.7 gal (49.2 L)
Features
Features
Cylinder Head: 4–Valve | Fan Type: Pusher | Oil Drain Extension | Heavy Duty Air Cleaner | Level 1 Fan and Belt Guards (Open Set Only) | Factory Filled Oil and Coolant | Radiator Duct Adapter (Open Set Only) | Critical Silencer | 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)
Construction Material
Piston Type: Aluminum | Crankshaft Type: Forged Steel | Stainless Steel Flexible Exhaust Connection | Rubber-Booted Engine Electrical Connections
Warranty
Warranty
2 Year Extended Limited Warranty (Standby Rated Units) | 1 Year Extended Limited Warranty (Prime Rated Units)