Minimum Rating
36.0 kVA / 36.0 kW
Maximum Rating
40.0 kVA / 40.0 kW

Emissions/Fuel Strategy
Fuel Optimised

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Providing unrivalled quality, the 24 – 220 kVA range of products offers a trusted performance with an enhanced choice of options, optimising the range for a variety of diverse applications and environments.

Generator Set Specifications

Minimum Rating 36.0 kVA / 36.0 kW
Maximum Rating 40.0 kVA / 40.0 kW
Voltage 240-240 Volts
Frequency 50hz
Speed 1500 RPM
50 Hz Prime Rating 36.0 kVA / 36.0 kW
50 Hz Standby Rating 40.0 kVA / 40.0 kW

Generator Set Configurations

Emissions/Fuel Strategy Fuel Optimised

Engine Specifications

Engine Model Perkins® 1103C-33TG2/3
Compression Ratio 18.23:1
Governor Type Mechanical
Bore 105 mm (4.1 in
Displacement 3.3l (201.4 cu. in)
Stroke 127 mm (5 in)



P40-4S Standard Equipment

  • Air Cleaner
  • Lube oil drain valve
  • Engine filled with lubrication oil
  • High Coolant Temperature Shutdown
  • Low Oil Pressure Shutdown
  • Exhaust stub pipe and gasket
  • Radiator & Cooling Fan
  • Fan,fan drive and battery charging alternator drive fully guarded to meet EC Machinery Directive
  • Cooling System filled with Coolant mix
  • Coolant drain valve
  • Exhaust flange outlet
  • Exhaust stub pipe and gasket
  • 8Hr fuel tank
  • Customer connection fuel sockets
  • Leroy Somer
  • SHUNT Excitation
  • IP23 Protection
Control Panel
  • DCP-10 / PowerWizard 1.1
  • Base, Formed Steel with Single wall Fuel Tank
  • Certified Base Mounted Lifting Eyes, and Rear Drag Eyelets
  • Battery Tray and Cables
  • Anti-vibration mounts

P40-4S Optional Equipment

  • Industrial, Residential, Critical Silencers
  • Alternator options including 3 Phase sensing, quadrature droop kit and PMG
  • Anti-Condensation Heater and Panel Circuitry (AH1)
Control Panels
  • PowerWizard 1.1+ Control Panel (PWT1.1+)
  • PowerWizard 2.1 Control Panel (PWT2.1)
  • Static battery charger with auto boost for lead acid battery
  • Upgrade to Standard Set for “CE” Certification
  • EEC Declaration of Conformity
  • Narrow, Wide or Skid Base
  • Sound attenuated, steel or galvanised enclosure
  • Dual wall fuel tanks

Benefits & Features

FG Wilson Diesel Engine

Perkins Engine


Benefiting from a choice of leading alternators, the range incorporates the Marelli alternator as standard across three phase models.


The FG Wilson DCP range allows you to monitor and control your generator set with ease, providing important diagnostic information whilst ensuring your unit operates within safe parameters. FG Wilson DCP digital control panels, provide simple, intuitive menu navigation and control of your generator set operations. Key information is displayed via the LCD screen and LED’s using universally recognised symbols, eliminating the need for complex instructions or language settings.

Design Criteria

Prime Rating These ratings are applicable for supplying continuous electrical power (at variable load) in lieu of commercially purchased power. There is no limitation to the annual hours of operation and this model can supply 10% overload power for 1 hour in 12 hours. Standby Rating These ratings are applicable for supplying continuous electrical power (at variable load) in the event of a utility power failure. No overload is permitted on these ratings. The alternator on this model is peak continuous rated (as defined in ISO 8528-3). Standard Reference Conditions Note: Standard reference conditions 25°C (77°F) Air Inlet Temp, 100m (328 ft) A.S.L. 30% relative humidity. Fuel consumption data at full load with diesel fuel with specific gravity of 0.85 and conforming to BS2869: 1998, Class A2.

Single-Source Supplier

Fully prototype tested with certified torsional vibration analysis available

World Wide Product Support

FG Wilson manufactures product in the following locations: Northern Ireland • Brazil • China • India • USA With headquarters in Northern Ireland, FG Wilson operates through a Global Dealer Network.