Generac SG450
Generac SG450 — 21.9 L V12 spark-ignited natural-gas industrial generator engine (Generac gaseous SG/MG platform). 350–450 kWe standby across SG/MG ratings, 1800 rpm / 60 Hz.
Production StatusIn Production
SG/MG
- Configuration
- V12
- Displacement
- 21.9 L
- Fuel
- Natural Gas
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
60 Hz1800 RPM
| Rating | Prime | Standby |
|---|---|---|
| Electrical output kWe | 409 | 450 |
| Apparent power kVA | 511.3 | 562.5 |
Datasheet & documents
Match the model number on your engine plate to the document. Check its revision date and the speed and duty listed for each power rating.
Technical specifications
Technical Specifications
| Brand | Generac |
| Model | SG450 |
| Series | SG/MG |
| Configuration | V12 |
| Cylinders | 12 |
| Displacement | 21.9 L |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | United States |
Check your engine model
The Generac SG450 is a natural gas generator-drive engine for 60 Hz generator sets, rated at 563 kVA / 450 kWe / standby rating. Match the model and serial number on your engine plate when requesting a manual or parts. The ratings and emissions information below help identify the version fitted to your generator.
Other ways this model is written
sg450Generac SG450SG/MG SG450
SG450 repair parts
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Frequently asked questions
What is the power output of the Generac SG450?
The Generac SG450 is rated at 563 kVA standby / 511 kVA prime at 60 Hz (1,800 rpm).
Does the SG450 run at 50 Hz or 60 Hz?
The Generac SG450 is rated for 60 Hz (1,800 rpm).
What fuel does the Generac SG450 use?
The Generac SG450 is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the SG450?
The Generac SG450 is a V12 (12-cylinder) engine with a displacement of 21.9 L.
What is the catalog status of the Generac SG450?
The Generac SG450 is marked active in this database. Confirm current production and availability with the manufacturer; catalog status is not a live supply check.
Are reference documents available for the SG450?
This page links reference documents for the Generac SG450. Check each document's title, model coverage, revision and rating conditions before using it for selection.