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Wacker Neuson G25


Versatile and reliable power, when and where you need it

The G25 mobile generator offers contractors and rental houses an excellent power solution. The compact, sound-attenuated model provides single and three-phase power for construction, commercial, industrial and special event applications where quiet, reliable power is needed. A digital controller monitors and protects the generator and engine while providing continuous operating data on an easy to read LCD display. Large capacity fuel tank for long run times and durable features for long life.

  • Ideally suited for construction sites where durability, reliability and flexibility are required to supply continuous power for applications such as lighting, cranes, concrete mixers and conveyor belts.
  • Brushless, oversized alternators with separate excitation winding and AVR (Automatic Voltage Regulation) provide superior motor starting and enhanced ability to run non-linear loads.
  • Single switch start and simple, uncluttered control panel provide unmatched ease of use.
  • Automatic remote start capability standard which is ideal for temporary standby applications.
  • Factory-installed customized options are available. These include, but are not limited to, a fluid containment system, cold weather options, a camlock panel, etc. Also available are optional trailers that are fully equipped and highway ready.





L x W x H Operating (Skid) in 76.6 x 35 x 44.5    
L x W x H Shipping (Skid) in 81 x 37.5 x 56.6    
L x W x H Shipping/Operating (Trailer) in 133 x 60 x 69    


Weight Dry (Skid) lb 1,911    
Weight Operating (Skid) lb 2,332    
Weight Shipping (Skid) lb 2,031    
Weight Operating (Trailer) lb 2,802    
Weight Shipping (Trailer) lb 2,381    

Operating data 

Trailer coupling Type 2in Ball    
Standby output   kW 20.4    
Prime output  kW 19.5    
Voltage 3 Phase V 240/480    
Current 3 Phase (Prime) A 58/29    
Current 1 Phase (Prime) A 120/240    
Voltage 3 Phase V 208, 220, 240, 416, 440, 480    
Voltage 1 Phase V 120, 127, 139, 240, 254, 277    
Circuit breaker (Main) A 70    
Frequency  Hz 60    
Power factor 1 Phase cos Φ 1~ 1    
Power factor 3 Phase cos Φ 3~ 0.8    
Sound level (LwA) at Prime (23 ft / 7 m)dB(A) 65    
Receptacles -20 Amp GFI Duplex 2    
Receptacles -50 Amp Twist Lock 2    

Engine / Motor 

Engine / Motor  Liquid-Cooled, 4 Cylinders    
Engine / Motor manufacturer  Isuzu    
Emissions Certified Tier 4i    
Displacement  in³ 133    
Operating performance SAE J1995, ISO 8528-1 hp 35.4    
at rpm  rpm 1,800    
Coolant Capacity US qt 11.9    
Engine oil Capacity US qt 8.5    
Fuel type  Diesel    
Fuel consumption (Prime Load) US gal/h 1.8    
Tank capacity -Fuel US gal 58.4    
Quantity (Battery) 1    
Battery  V 12    
Generator model  Mecc Alte, Brushless w/AVR    
Voltage control No Load to Full Load +/-% 1    
Voltage control Steady State +/- % 0.2    
Generator insulation (class)  H    
Frequency (Generator Speed) Hz 60    
Runtime at 100% Prime Load h 32.2    
Runtime at 75% Prime Load h 24.15