A model-specific render and installation drawing will be supplied with the quotation.
Designed and manufacturedin the United KingdomPerkins / Open set / 50 Hz
20 kVA class
Perkins diesel generator
Open set generator with a 404A-22G engine and Stamford S0L2-G1 reference alternator. Open sets require a suitable installation with ventilation, exhaust and weather protection.
Exact ratings above: 400 V, 3-phase, 50 Hz reference configuration. The model number is a rounded class.
Price and lead time confirmed with your quotation.
Technical specification.
| GenPro model | GPS20P |
|---|---|
| Engine brand / model | Perkins 404A-22G |
| Alternator | Stamford S0L2-G1 |
| Frequency | 50 Hz |
| Reference voltage | 400 V |
| Reference phase | 3 phase |
| Exact prime rating | 19.6 kVA / 15.7 kW |
| Exact standby rating | 21.2 kVA / 17 kW |
| Aspiration | Naturally Aspirated |
|---|---|
| Governor | Mechanical |
| No. of Cylinders | 4 |
| Cylinder Arrangement | In Line |
| Displacement | 2.216L |
| Cooling Type | Liquid Cooled |
| Coolant Capacity | 7.0L |
| Oil Capacity | 10.6L |
| Type | Brushless |
| Poles | 4 |
| AVR Model | AS540 |
| Voltage Regulation | 1% |
| Insulation Class | H |
| Excitation | Self Excited |
Voltage-specific ratings
Ratings for the reference engine and alternator configuration. Confirm the required connection and voltage with your quotation.
| Voltage | ESP kVA | ESP kW | PRP kVA | PRP kW |
|---|---|---|---|---|
| 200 V | 21.2 kVA | 17 kW | 19.6 kVA | 15.7 kW |
| 208 V | 21.3 kVA | 17 kW | 19.7 kVA | 15.8 kW |
| 230 V | 21.2 kVA | 17 kW | 19.6 kVA | 15.7 kW |
| 240 V | 21.3 kVA | 17 kW | 19.7 kVA | 15.8 kW |
| 400 V | 21.2 kVA | 17 kW | 19.6 kVA | 15.7 kW |
| 415 V | 21.3 kVA | 17 kW | 19.7 kVA | 15.8 kW |
Configuration options.
These documented electrical combinations sit within this rounded model family. Final enclosure and component selection are agreed with your quotation.
| Engine | Alternator | Phase | Voltage | Prime / PRP | Standby / ESP |
|---|---|---|---|---|---|
| 404A-22G | Stamford S0L2-G1 | 3 | 400 V | 19.6 kVA | 21.2 kVA |
| 404J-22G | Stamford S0L2-G1 | 3 | 400 V | 19.7 kVA | 21.4 kVA |
| 403A-15G2 | Stamford S0L2-G1 | 3 | 400 V | 14.8 kVA | 15.9 kVA |
| 404A-22G | Leroy Somer TAL040F | 3 | 400 V | 20 kVA | 22 kVA |
| 404J-22G | Leroy Somer TAL040F | 3 | 400 V | 20 kVA | 22 kVA |
| 403A-15G2 | Leroy Somer TAL040D | 3 | 400 V | 14.8 kVA | 16.2 kVA |
| 404A-22G | Leroy Somer TAL042C | 1 | 230 V | 18 kVA | 19.5 kVA |
| 404A-22G | Stamford S1L2-J1 | 1 | 230 V | 18.3 kVA | 20.1 kVA |
| 404J-22G | Stamford S1L2-J1 | 1 | 230 V | 18.4 kVA | 20.3 kVA |
| 403A-15G2 | Stamford S1L2-J1 | 1 | 230 V | 13.8 kVA | 15.1 kVA |
| 404A-22G | Leroy Somer TAL042D | 1 | 230 V | 18.5 kVA | 20.2 kVA |
| 404J-22G | Leroy Somer TAL042D | 1 | 230 V | 18.6 kVA | 20.4 kVA |
Installation & enclosure
| Dimensions, weight and fuel tank | Confirmed with quotation and build drawing |
|---|
Dimensions and weight relate to the stated reference build, not every option. Acoustic figures, where listed, are manufacturer references at 75% rated kW using distance corrections. Confirm the project noise requirement and final drawing before installation.
Fuel consumption
| 50% Load | 2.9 litres/hour |
|---|---|
| 75% Load | 4 litres/hour |
| 100% Load | 5.3 litres/hour |
| 110% Load | 6.1 litres/hour |
Manufacturer reference consumption. Actual fuel use depends on load, operating conditions and the final specification.


