PSI
PSI 20L
PSI 20L — 19.6 L L6 (150 × 185 mm bore × stroke) turbocharged & air-to-air charge-cooled natural gas / propane generator engine, 10.5:1 compression, 2110 kg dry. 400 kWe standby / 365 kWe prime @ 50 Hz. From the official PSI 20L spec sheet (LPG standby 250/300 kWe).
- Standby Power · 50 Hz
- 500 kVA
- Electrical Output
- 400 kWe
- Cylinders
- L6
- Displacement
- 19.6 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 | 414 | 365 | 456.3 |
| Standby Power | 460 | 400 | 500 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 450 | 400 | 500 |
| Standby Power | 570 | 500 | 625 |
PSI 20L generator set context
The PSI 20L is listed here as a natural gas generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 500 kVA / 400 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 | 20L |
| Configuration | L6 |
| Cylinders | 6 |
| Displacement | 19.6 L |
| Compression Ratio | 10.5:1 |
| Dry Weight | 2110 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 20L?
The PSI 20L is rated at 500 kVA standby / 456 kVA prime at 50 Hz (1,500 rpm); and 625 kVA standby / 500 kVA prime at 60 Hz (1,800 rpm).
Does the 20L run at 50 Hz or 60 Hz?
The PSI 20L is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the PSI 20L use?
The PSI 20L is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the 20L?
The PSI 20L is an inline-6 (6-cylinder) engine with a displacement of 19.6 L.
What emissions standard does the 20L meet?
The PSI 20L is certified to U.S. EPA Stationary emissions standards.
Is the PSI 20L still in production?
Yes — the PSI 20L is a current production model.
Is a datasheet available for the 20L?
Yes — an official PSI datasheet for the PSI 20L can be downloaded from this page.
Related Engines
Reference
- Canonical page
- /engines/psi-gas-20l
- Last database update
- 2026-06-29
- Manufacturer files
- 2 datasheets linked
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