Stationary Generator | 450kW | Gaseous | 21.9L
Reliable. Scalable. Proven.
When power loss isn’t an option, Generac’s 21.9 L 350 kW, 400 kW & 450 kW gaseous generators delivers robust standby or prime power performance with the reliability you expect from a fully integrated Generac system. Engineered for long runtimes, seamless paralleling, and reduced maintenance, this natural gas generator keeps critical operations online—no matter what’s happening on the grid.
Features & Benefits
Purpose-Built Spark-Ignited Engine: Generac’s 21.9 L V12 engine is engineered exclusively for natural gas, with turbocharged and aftercooled design for maximum power density, lower emissions, and extended service life.
POWER ZONE® Pro Sync Controller: Advanced 7-inch color touchscreen controller offering NFPA 110 Level 1 compliance, Ethernet and Modbus® communications, and built-in synchronizing capability for multi-generator systems.
Generator Paralleling with MPS Architecture: Connect multiple units through Generac’s Modular Power System (MPS) for up to 99.999% reliability, scalable load management, and cost-effective redundancy.
High-Performance Alternator: Brushless permanent-magnet excitation with Class H insulation and < 5% THD delivers clean, stable power for sensitive loads.
Engineered Enclosures: Generac-manufactured steel and aluminum enclosures offer exceptional noise attenuation, corrosion resistance, and weather protection—available from Level 1 to Level 3 sound ratings.
Factory-Integrated Design: Every major system—engine, alternator, controls, and enclosure—is designed and tested by Generac for seamless compatibility and single-source accountability.
Performance
Sound Levels/Enclosures: Open and Weather-Protected Level 1, 2 and 3 Sound-Attenuated Enclosures for the highest degree of noise reduction available.
Cooling System: Pressurized Closed-Loop with 50/50 Ethylene Glycol for reliability in all climates and reduced maintenance.
Construction: Steel or aluminum with RhinoCoat™ powder-coated finish protects against rust, UV and weather for long-term durability
Product Snapshot
Power Nodes: 350 kW | 400 kW | 450 kW
Ideal For: Large commercial facilities, manufacturing plants, healthcare sites, municipal infrastructure, and mission-critical operations.
Applications: Standby, prime, and demand-response power where low-emission, long-runtime natural gas generation is required.
Footprint: Approx. 207 – 247 in L × 71 in W × 80 – 129 in H (depending on enclosure)
Operating Temperature: Up to 122°F (50°C) before derate
Certifications: EPA Certified Stationary Emergency & Non-Emergency, UL2200, NFPA 110 Level 1 Compliant
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