PSI
PSI 40L
PSI 40L — 39.23 L V12 (150 × 185 mm bore × stroke) turbocharged & air-to-air charge-cooled natural gas / propane generator engine, 10.5:1 compression, 3390 kg dry. 650 kWe standby / 585 kWe prime @ 50 Hz. From the official PSI 40L spec sheet (LPG standby 430/500 kWe).
- Standby Power · 50 Hz
- 813 kVA
- Electrical Output
- 650 kWe
- Cylinders
- V12
- Displacement
- 39.23 L
- Rated Speed
- 1,500 / 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 666 | 585 | 731.3 |
| Standby Power | 740 | 650 | 812.5 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 828 | 725 | 906.3 |
| Standby Power | 920 | 800 | 1000 |
PSI 40L generator set context
The PSI 40L is listed here as a natural gas generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 813 kVA / 650 kWe / standby 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 | PSI |
| Model | 40L |
| Configuration | V12 |
| Cylinders | 12 |
| Displacement | 39.23 L |
| Compression Ratio | 10.5:1 |
| Dry Weight | 3390 kg |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Stationary |
| Certifications | EPA |
| Country of Origin | United States |
Frequently asked questions
What is the power output of the PSI 40L?
The PSI 40L is rated at 813 kVA standby / 731 kVA prime at 50 Hz (1,500 rpm); and 1,000 kVA standby / 906 kVA prime at 60 Hz (1,800 rpm).
Does the 40L run at 50 Hz or 60 Hz?
The PSI 40L is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the PSI 40L use?
The PSI 40L is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the 40L?
The PSI 40L is a V12 (12-cylinder) engine with a displacement of 39.23 L.
What emissions standard does the 40L meet?
The PSI 40L is certified to U.S. EPA Stationary emissions standards.
Is the PSI 40L still in production?
Yes — the PSI 40L is a current production model.
Is a datasheet available for the 40L?
Yes — an official PSI datasheet for the PSI 40L can be downloaded from this page.
Related Engines
Reference
- Canonical page
- /engines/psi-gas-40l
- Last database update
- 2026-06-29
- Manufacturer files
- 2 datasheets linked
Need this engine?
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