25REZG Industrial – Kohler® LP & Natural Gas Generator


  • KOHLER Co. provides one-source responsibility for the generating system and accessories.
  • The generator set and its components are prototype-tested, factory-built ,and production-tested.
  • The 60 Hz generator set offers a UL 2200 listing.
  • The generator set accepts rated load in one step.
  • The 60 Hz generator set meets NFPA 110, Level 1, when equipped with the necessary accessories and installed per NFPA standards.
  • A one-year limited warranty covers all systems and components. Two- and five-year extended warranties are also available.

Alternator Features:

  • The unique Fast-Response(TM) II excitation system delivers excellent voltage response and short circuit capability using a permanent magnet (PM)-excited alternator.
  • The brushless, rotating-field alternator has broad range reconnectability.
  • NEMA MG1, IEEE, and ANSI standards compliance for temperature rise and motor starting.
  • Sustained short-circuit current of up to 300% of the rated current for up to 10 seconds.
  • Sustained short-circuit current enabling down stream circuit breakers to trip without collapsing the alternator field.
  • Self-ventilated and drip-proof construction.
  • Vacuum-impregnated windings with fungus-resistant epoxy varnish for dependability and long life.
  • Superior voltage waveform from a two-thirds pitch stator and skewed rotor.
  • Fast-Response(TM) II brushless alternator with brushless exciter for excellent load response.

Other Features:

  • Controllers are available for all applications.
  • The electronic, isochronous governor incorporates an integrated drive-by-wire throttle body actuator delivering precise frequency regulation.

25 kW Specifications
Standby Ratings:
25 kW (31 kVa)
60 Hz
Alternator Type:
Brushless, Permanent-Magnet
Engine Manufacturer:
General Motors
Engine Model:
Industrial Powertrain 3.0L, 4-Cycle
Cylinder Arrangement:
Max Power at Rated RPM:
33 kWm (44 BHP)
Standby Fuel Consumption at
100% load:
4.5 m3/hr. (156 cfh)
75% load:
3.6 m3/hr. (127 cfh)
50% load:
2.4 m3/hr. (83 cfh)
25% load:
1.4 m3/hr. (50 cfh)
30 kW Specifications
40 kW Specifications
45 kW Specifications
50 kW Specifications
60 kW Specifications
80 kW Specifications
100 kW Specifications
125 kW Specifications
150 kW Specifications
180 kW Specifications
200 kW Specifications
250 kW Specifications
300 kW Specifications
350 kW Specifications
400 kW Specifications
Additional Generators