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The G25 mobile generator offers contractors and rental houses an excellent power solution. The compact design includes an integrated trailer with folding tongue to allow more machines to fit on a flatbed trailer. The efficient, quiet generator 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.

Please be aware that if a price is advertised through Google, it is outdated as the mfg has had another price increase. We are also awaiting the production rpt for estimated ship dates for our pre-ordered stock units. As always it is less money to ship direct from the mfg, but those orders will have an even longer lead time.

Price does not include freight, please read below & Call Rich 412.447.5400 ext 6.

Price is based on a prepaid wire transfer to avoid credit card fees

Freight will be Added at actual cost. Serious and ready to commit inquiries are welcome to contact us for final freight and total order cost.

Wacker Neuson G25 Mobile Generator Brochure (click for pdf)

  • Kohler turbo-charged engine uses Diesel Oxidation Catalyst (DOC) to provide a DPF and regeneration-free experience.
  • Brushless, oversized alternators with separate excitation winding and AVR (Automatic Voltage Regulation) provide superior motor starting and enhanced ability to run non-linear loads
  • Voltage selector switch allows operator to easily select setting before starting the generator
  • Automatic remote start capability standard which is ideal for temporary standby applications.
  • QuietPower rated at 63 dBA, ideal for sound-sensitive applications such as special events


L x W x H Operating (Skid) in76.6 x 37.8 x 48.5
L x W x H Shipping/Operating (Trailer) in131.8 x 58.3 x 68.8


Weight Dry (Skid) lb1,808
Weight Operating (Skid) lb2,222
Weight Operating (Trailer) lb2,576
Weight Shipping (Trailer) lb2,163

Operating data 

Standby output   kW22
Standby output  kVA27
Prime output  kW20
Voltage 3 Phase V240/480
Current 3 Phase (Prime) A60/30
Current 1 Phase (Prime) A62
Voltage 3 Phase V208 / 220 / 240 / 416 / 440 / 480
Voltage 1 Phase V120, 127, 139, 240, 254, 277
Circuit breaker (Main) A80
Frequency  Hz60
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) Electric FandB(A)63.4
Receptacles -20 Amp GFI Duplex2
Receptacles -50 Amp Twist Lock2

Engine / Motor 

Engine / Motor Liquid-Cooled, 3 Cylinders
Engine / Motor manufacturer Kohler
Emissions CertifiedTier 4
Displacement  in³113.52
Operating performance ISO 14396 hp45.1
at rpm  rpm1,800
Coolant Capacity US qt12.2
Engine oil Capacity US qt9.4
Fuel type #1/#2 ULSD
Fuel consumption (Prime Load) US gal/h1.8
Tank capacity -Fuel US gal63
Quantity (Battery)1
Battery  V12
Generator model Mecc Alte, Brushless
Voltage control No Load to Full Load +/- %1
Voltage control Steady State +/- %0.2
Generator insulation (class) H
Frequency (Generator Speed) Hz60
Runtime at 100% Prime Load h33.6