Kohler Power Generators
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12RES

12 kW Generator

12RES Single Phase, Natural Gas|LP

Starting at $4,120.00 MSRP*
*Starting price in US dollars. Does not include installation, automatic transfer switch or accessories or costs to export outside the US.
Get a Quote Find a Dealer Required Components

Required Components

Automatic Transfer Switch Options What's This?

An automatic transfer switch (aka ATS) is a required component in your automatic backup power system. Click to see full description.

ATS Product Options *Does not include installation
  • Battery: Group 26 - 8.5-30 kW

    Battery: Group 26 - 8.5-30 kW Starting at $95.00 MSRP*

    Power your generator engine with a reliable 12-volt battery. Generators ship without batteries to ensure that the freshest possible battery is installed at the jobsite.

Overview

Affordable, commercial-grade power for basic power needs. When a bad storm or utility failure knocks out your power, the 12RES KOHLER® generator keeps your lights on, fridge cold and sump pump working. This generator will power most appliances in smaller homes, or a few critical items in larger homes.*

  • Reliable.
    Inside this generator is a commercial-grade engine built to withstand extreme workloads year after year.
  • Powerful.
    In just 10 seconds, your KOHLER generator automatically restores power to your heat or AC as well as appliances and electronics.*
  • Premium warranty.
    We've got you covered with 5-year, 2,000-hour protection and a steel enclosure that's built to last.
  • Flexible.
    Fits both standby and off-grid applications for the ultimate versatility while saving the battery with hibernating controller capability
  • Money Saver.
    No pricey concrete pad needed. Your contractor – and your wallet – will appreciate the built-in mounting pad and easy-to-connect terminal block.

THE POWER YOU NEED

  • PowerBoost™ technology provides the power to start large loads without dropping power to other appliances
  • Extraordinary peak motor-starting capacity to start and run a typical 4 ton air conditioner while still running other home appliances and electronics
  • Premium power quality delivers exceptional digital voltage and frequency regulation along with low levels of harmonic distortion to protect sophisticated electronics
  • Powered by reliable KOHLER Command PRO® engine, designed and tested for tough commercial applications; with hydraulic valve lifters to eliminate need for lengthy break-in periods and expensive valve adjustments; operation speed is 3600 rpm (the standard for air-cooled generators)

THE CONVENIENCES YOU EXPECT

  • ADC-RES Advanced Digital Control designed for today's sophisticated electronics
  • Quiet, neighborhood-friendly operation with sound levels similar to a typical central air conditioner
  • Steel enclosure with automotive-grade paint for advanced corrosion protection
  • Runs on either natural gas or liquid propane (LPG) with simple switching between natural gas and LPG in the field
  • Streamlined installation, including built-in base that eliminates need for concrete mounting pad and simple terminal block for easy field connections
Specs
Rated kW LP 12 kW
Rated kW NG 10.4 kW
Amps LP 50 amps
Amps NG 43 amps
Peak Motor Starting kVA @240 V 32 kVa
Alternator Note All information shown is for 1 Phase 60 Hz generator with the largest alternator option available.
Displacement 0.725 L (44 cu. in.)
Horsepower NG 20.5 HP, LP 23.6 HP
Enclosure Material Steel
Sound Output During Weekly Exercise 65 dB(A)
Sound Output During Full-speed Operation 65 dB(A)
Response Time 10 seconds
Warranty Premium five-year limited warranty
Country of Origin US
Certifications/Listings CARB|EPA|UL 2200
Automatic Transfer Switch Included No
Remote Monitoring Available Yes
Off Grid / Utility Backup Utility Backup|Off Grid
Weight 400 lbs. (182 kg)
Alternator Type 2-Pole, Rotating Field
Fuel Consumption on NG at 50% load? 124 cfh
Fuel Consumption on LP at 50% load? 60 cfh
Controller RDC2 Controller
Cylinder Arrangement V-2
Dimensions 1123 mm x 726 mm x 804 mm (44.2 in. x 28.6 in. x 31.6 in.)
Engine Manufacturer/Description KOHLER
Engine Model CH740
Engine/Alternator RPM 3600
Fuel Type Natural Gas|LP
Frequency 60 Hz|50 Hz
Phase Single Phase
Voltage @ 60 Hz 120/240
Digital Voltage Regulation ±1.5%
Built in Mounting Pad Yes

Automatic Transfer Switch Options What's This?

An automatic transfer switch (aka ATS) is a required component in your automatic backup power system. Click to see full description.

ATS Product Options *Does not include installation
  • Battery: Group 26 - 8.5-30 kW

    Battery: Group 26 - 8.5-30 kW

    Starting at $95.00 MSRP*

    Power your generator engine with a reliable 12-volt battery. Generators ship without batteries to ensure that the freshest possible battery is installed at the jobsite.

    Details

Automatic Transfer Switch Options What's This?

An automatic transfer switch (aka ATS) is a required component in your automatic backup power system. Click to see full description.

ATS Product Options *Does not include installation

Required Components

  • Battery: Group 26 - 8.5-30 kW

    Battery: Group 26 - 8.5-30 kW

    Starting at $95.00 MSRP*

    Power your generator engine with a reliable 12-volt battery. Generators ship without batteries to ensure that the freshest possible battery is installed at the jobsite.

    Details

Recommended Accessories

  • Carburetor Heater, 6/12/14 kW, 120V

    Carburetor Heater, 6/12/14 kW, 120V

    Starting at $97.00 MSRP*

    If you live where temperatures routinely dip below freezing, a carburetor heater helps keep cold weather conditions from disrupting generator operation.

    Details

Optional Accessories

  • Maintenance Kit, 12/14kW

    Maintenance Kit, 12/14kW

    Starting at $60.00 MSRP*

    Just like your car, you can keep your KOHLER® generator running at peak performance with genuine KOHLER engine synthetic oil and parts.

    Details
  • Battery Heater, 8.5/12/15/17/18/30kW

    Battery Heater, 8.5/12/15/17/18/30kW

    Starting at $150.00 MSRP*

    Feel confident that your generator will perform in sub-freezing weather. When the temperature falls below a determined level, the thermostat activates the battery heater for optimum battery temperature.

    Details