40 kVA Perkins generator typically utilizes the Perkins 1103 series engine, specifically the 1103A-33TG1.  three-phase for prime and standby power applications. 
 
Core Performance Ratings
Prime Power: 36–40 kVA (approx. 29–32 kW).
Standby Power: 40–44 kVA (approx. 32–35 kW).
Frequency/Speed: 50 Hz at 1500 RPM (standard for global use) or 60 Hz at 1800 RPM.
Voltage Options: 400V/415V (Three-Phase).
 
Engine Specifications (Perkins 1103A-33TG1) 
Cylinders: 3 cylinders in-line.
Displacement: 3.3 Liters.
Aspiration: Turbocharged.
Cooling System: Water-cooled with radiator and fan.
Fuel Consumption:
75% Load: ~7.7 to 8.2 Liters/hour.
100% Load: ~10.7 Liters/hour. 
 
Control System
Alternator Brands: Stamford.
Voltage Regulation: ±1% via an Automatic Voltage Regulator (AVR).
Control Panel: Typically features a Deep Sea Electronics Smartgen digital controller for monitoring oil pressure, water temperature, and engine speed. 
Operational Data
Enclosure: Silent/Soundproof Canopy (weather-resistant for outdoors).
Noise Level: Silent models 65 dB at 7 meters.
Dimensions (Canopy): Approximately 2250mm (L) x 950mm (W) x 1200mm (H).
Weight: Dry weight 1250 kg 
Double Axle Towable Trailer