Industrial Generator, 500kW | Final 4 Tier | Diesel | 18.1L

Engineered for Maximum Reliability.
Generac’s 18.1 L 500 kW Tier 4 Final diesel generator delivers proven performance and durability for large commercial and industrial operations—while meeting the most stringent emissions requirements. Designed and manufactured in Generac’s vertically integrated facilities, key components—including the alternator, control system, aftertreatment, and enclosure—are engineered together to ensure seamless compatibility, compliance, and long-term reliability. Easy to service and built to last, this Tier 4 Final solution provides the dependable, code-ready power your operation demands.

Features & Benefits

Proven 18.1 L Perkins Engine: Turbocharged and intercooled 6-cylinder engine delivers high efficiency, rapid load acceptance, and exceptional reliability under continuous operation.

Tier 4 Final–Certified Emissions System: Fully integrated Tier 4 Final aftertreatment system meets EPA emissions requirements without compromising performance—enabling easier permitting, reduced environmental impact, and confident deployment in regulated jurisdictions.

POWERZONE® Pro Sync Controller: Advanced 7-inch color touchscreen controller with Modbus® RTU/TCP, Ethernet, and BMS integration—offering comprehensive system monitoring, diagnostics, and control.

Modular Power System (MPS) Paralleling: Easily scale capacity and redundancy with Generac’s plug-and-play MPS architecture, delivering up to 99.999% system reliability.

Industrial-Grade Alternator: Brushless permanent-magnet excitation design with Class H insulation and <3% THD provides clean, stable power for sensitive loads.

Engineered Enclosures: Generac-built steel and aluminum enclosures combine sound attenuation, corrosion resistance, and all-weather durability, available in multiple acoustic levels.

Performance

Prime Power Range: 540 kW Prime

Cooling System: Closed-Loop Pressurized with 50/50 Ethylene Glycol for reliability in all climates and reduced maintenance.

Fuel Type: Ultra-Low Sulfur Diesel (ASTM Specification) for a cleaner operation, regulatory compliance and equipment protection.

Sound Levels/Enclosures: Open and weather-protected enclosures with sound attenuation up to 77dBa at 23’ for stringent noise requirements.

Construction: Steel or aluminum with RhinoCoat™ powder-coated finish protects against rust, UV and weather for long-term durability

Product Snapshot

Power Nodes: 500 kW | 600 kW | 750 kW

Ideal For: Manufacturing plants, data centers, healthcare facilities, and municipal infrastructure requiring large-scale standby power.

Applications: Standby and parallel-ready systems where continuous reliability, serviceability, and scalability are critical.

Footprint: Open Unit Dims: 189 x 71 x 117" | SL2 Enclosed Dims: 208 x 71 x 158"

Operating Temperature: Up to 122 °F (50 °C) before derate

Certifications: EPA Certified Stationary Emergency, UL2200, NFPA 110 Compliant

Specifications

Current Model Shown:

Units:

US/Imperial Metric

Fuel Type: Diesel

Engine: Perkins

Engine Type: 6-cyl in-line

Engine Size (Liters): 18.1

Engine Output (kW): 500

Running Watts (W): 500,000

kW/kVA Prime: 500/625

Engine Manufacturer: Perkins

Open Set Footprint - L x W x H: inches (millimeters): 1885 (4,790) x 71.0 (1,803) x 116.8 (2,967)

Enclosed Footprint - L x W x H: inches (millimeters): 207.4 (5,268) x 71.0 (1,803) x 157.2 (3,992)

Controller Type: Deep Sea G8601 Controller

Enclosure: Steel or Aluminum

Steel (kg): 1,728

Steel (lb): 3,809

Aluminum (kg): 887

Aluminum (lb): 1,955

HZ: 60

Emissions Compliance: Tier 4 Final

Stationary Generator | 500kW | Diesel | 18.1L

Industrial Generator, 500kW | Final 4 Tier | Diesel | 18.1L

Features & Benefits

Performance

Product Snapshot

Specifications