Wärtsilä
Wärtsilä 20V34SG
34SG
Wärtsilä 20V34SG — 726.5 L V20 four-stroke lean-burn spark-ignited gas engine generating set (Wärtsilä 34SG), for power plants. 9795 kWe at 750 rpm / 50 Hz, 9388 kWe at 720 rpm / 60 Hz; electrical efficiency 48.9%.
- Prime Power · 50 Hz
- 12,244 kVA
- Electrical Output
- 9,795 kWe
- Cylinders
- V20
- Displacement
- 726.5 L
- Rated Speed
- 750 / 900 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz750 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | — | 9795 | 12243.8 |
60 Hz900 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | — | 9388 | 11735 |
Wärtsilä 20V34SG generator set context
The Wärtsilä 20V34SG is listed here as a natural gas generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 12,244 kVA / 9,795 kWe / prime rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
Also searched as
Technical Specifications
| Brand | Wärtsilä |
| Model | 20V34SG |
| Series | 34SG |
| Configuration | V20 |
| Cylinders | 20 |
| Displacement | 726.5 L |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | Finland |
Frequently asked questions
What is the power output of the Wärtsilä 20V34SG?
The Wärtsilä 20V34SG is rated at 12,244 kVA prime at 50 Hz (750 rpm); and 11,735 kVA prime at 60 Hz (900 rpm).
Does the 20V34SG run at 50 Hz or 60 Hz?
The Wärtsilä 20V34SG is available for both 50 Hz (750 rpm) and 60 Hz (900 rpm).
What fuel does the Wärtsilä 20V34SG use?
The Wärtsilä 20V34SG is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the 20V34SG?
The Wärtsilä 20V34SG is a V20 (20-cylinder) engine with a displacement of 726.5 L.
Is the Wärtsilä 20V34SG still in production?
Yes — the Wärtsilä 20V34SG is a current production model.
Is a datasheet available for the 20V34SG?
Yes — an official Wärtsilä datasheet for the Wärtsilä 20V34SG can be downloaded from this page.
Compare Wärtsilä 20V34SG
Downloads
Reference
- Canonical page
- /engines/wartsila-20v34sg
- Last database update
- 2026-06-08
- Manufacturer files
- 1 datasheet linked
Need this engine?
Need a generator package using this engine? Haifeng Machinery can help with sizing, alternator selection, controller, enclosure, voltage, and compliance support.
Get a Quote ↗Or browse Haifeng's gas generator sets ↗