30REZGT, 60 Hz, Propane/Natural Gas

Standby Range (kW/kVA) 28/28-35

Prime Range (kW/kVA) 25/25-31

Fuel Type Propane, Natural Gas, Propane/Natural Gas

Frequency 60 Hz

Speed 1800 RPM

Alternator Type Brushless, Rare-Earth, Permanent-Magnet

Engine Manufacturer General Motors

Emissions EPA-Certified for Prime Power and Standby Applications

Sound Levels 66 dB(A) @ 7 m (23 ft.) full load at prime rating

Fuel Capacity/Run Time 85 gal.

Kva/kW 25-35/25-28



  • KOHLER Co. provides one-source responsibility for the generating systems and accessories
  • Three year limited warranty covers all generator systems and components and one year limited warranty covers the trailer
  • Easy valve system to switch between propane and natural gas fuel sources. Optional on-board LP fuel tank 322L (85 gal.) provides 24 hours of run-time at 75% load
  • Sound level of 66 db(A) @ 7 m (23 ft) at full load prime rating
  • 110% environmental containment of oil and coolant; fluid containment not needed for optional on-board fuel tanks as propane will evaporate at atmospheric pressure eliminating the potential for ground spill
  • Kohler’s DEC3500 digital controller is encapsulated for protection against vibration and environmental conditions, auto senses voltage eliminating the need to program voltage changes and includes paralleling functionality


  • EPA certified for prime power applications
  • Fuel valving system and external connection ports for easy switching between LP gas, LP liquid and natural gas fuel supply
  • Electronic, isochronous governor
  • Heavy-duty air cleaner with restrictor indicator
  • Battery, battery rack, and cables
Model Decision-Maker® 3500
Product Range REZGT/REOZT4 and REOZK4/REOZJ4 models
Communications Modbus® RTU Standard, Modbus® TCP Optional
Inputs and Outputs Extended inputs/outputs optional
Product Range REZGT/REOZT4 and REOZK4/REOZJ4 models
Paralleling Yes
NFPA 110 NFPA 110 Level 1
Auto Voltage Sensing Yes