Trusted to Perform. Built to Endure.
The Generac G4.5L generator family defines what industrial standby power should be: rugged, proven, and always ready. Offered in both Naturally Aspirated (NA) and Turbocharged (TA) models, the G4.5L delivers reliable power across eight flexible kW nodes. With enhanced serviceability, real-time remote monitoring capability, and fuel system conversion capable (NG to LPV and vice-versa, with a controller configuration file update), this platform is designed to support the toughest environments and your most critical operations. 

Features & Benefits

Generac-Built Spark-Ignited Engines
The Generac 4.5L is purpose-built from the block up for natural gas and propane applications, ensuring reliable performance and long engine life.

Durable, Quiet Enclosures
Manufactured by Generac with premium sound-absorbing materials, corrosion-resistant coatings, and gasketed doors for maximum weather protection and noise reduction.

DSE G8601 Controller
Advanced digital controller with high-resolution display, integrated PLC functionality, Modbus® communication, and on-screen system diagnostics for intuitive operation.

Precision-Built Alternators
Brushless, machine-wound and varnished Generac industrial alternators deliver exceptional voltage stability and reduced harmonic distortion (<5% THD) with Class H insulation.

Fully Integrated Design
Engine, alternator, enclosure, and controls engineered together under one roof—simplifying service, ensuring compatibility, and eliminating third-party dependencies.

Flexible Configuration Options
Choose from open, weather-protected, high velocity hurricane-zone or sound-attenuated enclosures, with multiple breaker and fuel configurations to match your installation site needs.

Performance

Runtime: Extended via utility-supplied natural gas—no refueling required

Sound Levels/Enclosures: Open, Level 1 & 2 sound-attenuated enclosures available providing options for stringent public facilities where noise matters. Florida Department of Business and Professional Regulation approved High Velocity Hurricane Zone wind enclosures.

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

Product Snapshot

Power Nodes: 35 kW | 40 kW | 45 kW | 50 kW | 60 kW | 70 kW | 80 kW

Ideal For: Small commercial facilities, municipal buildings, schools, light industrial, telecom sites and retail operations

Applications: Standby power where quiet, low-maintenance, natural gas or propane fuel system application is preferred

Certification: EPA Certified Stationary Emergency, UL2200