KOHLER 6 kW Generator

6 kW Generator

6VSG Single Phase, Natural Gas|LPG
Starting at $5,304.00 MSRP*
*Starting price in US dollars. Does not include installation, automatic transfer switch or accessories or costs to export outside the US.




The generator made for renewable energy, including solar power or other remote applications. The KOHLER 6VSG battery-charging generator efficiently charges battery banks when renewable energy sources can’t keep up with demand. If your battery charge drops below a pre-set level, the 6VSG charges it automatically.

  • High-quality power.
    The 6VSG provides consistent power to charge battery banks used with renewable energy, telecom and other remote applications.
  • Economical.
    The 6VSG is fueled by clean, affordable natural gas or liquid propane (LPG).
  • Remote control.
    Add the Programmable Interface Module and OnCue® Generator Management System to communicate with the 6VSG remotely.
  • Automatic.
    The generator senses when the battery bank is running low and turns on automatically to keep up with demand.


Designed specifically for efficient charging of battery banks for renewable energy, telecom and other remote applications; provides consistent direct-current output to maintain battery banks directly without inefficient conversions from alternating current

Can be used for industrial battery bus support to reduce the size of battery banks

Generator can maintain batteries directly without an expensive converter or monitoring equipment

Longer engine life and reduced fuel consumption when compared to fixed speed; variable engine speed (2300-2900 RPM) reduces maintenance requirements and fuel consumption and extends the life of the engine

Powered by commercial-grade KOHLER Command PRO® engine

Accommodates most systems; compatible with positive- or negative-grounded systems in 24, 36 and 48 volt configurations

Compatible with optional OnCue® Generator Management System 3.1 or higher and Programmable Interface Monitor


Extremely quiet operation with sound at 62 dBA at 50% load

Steel enclosure with automotive-grade paint for advanced corrosion protection

Runs on either natural gas or liquid propane (LPG); simple switching between natural gas and LPG in the field

5-year, 2000-hour warranty for on-grid applications

18-month, 1000-hour warranty for off-grid application

Optional installed communications kit includes fuel-pressure switch and enclosure intrusion alarm




Rated kW LP 6 kW
Rated kW NG 6 kW
Amps LP 111 amps
Amps NG 111 amps
Alternator Note All information shown is for 48 VDC nominal voltage.
Displacement 725 cm3 (44 cu. in.)
Horsepower NG 18.5 HP, LP 21.2 HP
Enclosure Material Steel
Sound Output During Weekly Exercise 66 dB(A)
Sound Output During Full-speed Operation 66 dB(A)
Warranty Premium five-year/2000-hour limited warranty for on-grid applications, 18-month/1000-hour for off-grid applications
Country of Origin US
Certifications/Listings EPA|CSA
Automatic Transfer Switch Included No
Remote Monitoring Available Yes
Off Grid Warranty 18-month/1000-hour for off-grid applications
Off Grid / Utility Backup Utility Backup|Off Grid
Weight 420 lbs.
Alternator Type Brushless, Permanent-Magnet
Fuel Consumption on NG at 50% load? 75 cfh
Fuel Consumption on LP at 50% load? 32 cfh
Controller VSC Controller
Cylinder Arrangement V-2
Dimensions 1008 mm x 707 mm x 723 mm (39.7 in. x 27.8 in. x 28.5 in.)
Engine Manufacturer/Description KOHLER
Engine Model CH740
Engine/Alternator RPM 3300
Fuel Type Natural Gas|LPG
Frequency Variable Speed, Direct Current
Phase Single Phase
Voltage @ 60 Hz 24/48
Digital Voltage Regulation ±0.5%
Built in Mounting Pad No


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