Kohler 12RESV-QS8 Standby Generator – 12kW, LP/NG, w/ Remote Monitoring

Item # 12RESV-QS8 Brand: Kohler


Due to high demands, please call for lead times.

Premium power quality delivers exceptional digital voltage and frequency regulation along with low levels of harmonic distortion to protect sophisticated electronics.

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Our generators for backup power provide reliability and performance. When you lose power during an outage or storm, a hard-working 12kW Kohler generator keeps your appliances working, the heat or AC running and your security system on. OnCue Plus Generator Management System is standard with every RESV generator.


  • High Quality Power – Kohler generators provide advanced voltage and frequency regulation along with the ultra-low levels of harmonic distortion for excellent generator power quality to protect your valuable electronics
  • Powerful – The Kohler 12kW generator can easily start and run a 5-ton air conditioner with up to 5kW preload.
  • Reliable – Kohler is known for extraordinary reliability and performance and backs that up with a 5-year or 2,000-hour limited warranty
  • Enclosure – Bold new Kohler design in steel, dipped in e-coat for extra corrosion protection and painted with a durable powder coat finish
  • Remote Monitoring – Every 12RESV comes standard with OnCue Plus, our remote monitoring system, which gives you peace of mind at home no matter where you are in the world


  • Rated kW LP: 12kW
  • Rated kW NG: 11kW
  • Amps LP: 50 amps
  • Amps NG: 45.8 amps
  • Peak Motor Starting kVA @ 240V: 20.3 kVa
  • Alternator Note: All information show is for 1 phase, 60 Hz generators with the largest alternator option available.
  • Displacement: 0.725 cm-cubed (44 cu. in.)
  • Horsepower: NG 18 HP, LP 21.4 HP
  • Enclosure Material: Steel
  • Sound Output During Weekly Exercise: 67 dB(A)
  • Sound Output During Full-Speed Operation: 71 dB(A)
  • Response Time: 10 seconds
  • Warranty: Premium five-year limited warranty
  • Country of Origin: US
  • Certifications / Listings: CSA, UL 2200, cUL, EPA
  • Automatic Transfer Switch: Sold separately
  • Remote Monitoring Available: Included
  • Off Grid / Utility Backup: Utility backup
  • Weight: 433 lbs.
  • Alternator Type: 2-Pole, Rotating field
  • Fuel Consumption on NG at 50% Load: 128 CFH
  • Fuel Consumption on LP at 50% Load: 57 CFH
  • Controller: RDC2 Controller
  • Cylinder Arrangement: V-2
  • Dimensions: 30.6″ x 28″ x 32.4″
  • Engine Manufacturer / Description: Kohler
  • Engine Model: kt725 1.9 L, 4-Cycle
  • Engine / Alternator RPM: 3600
  • Fuel Type: LP / NG
  • Frequency: 60 Hz
  • Phase: Single phase
  • Voltage @ 60 Hz: 120/240V
  • Digital Voltage Regulation: +/- 1.0%
  • Built in Mounting Pad: Yes

Additional information

Brand Kohler
Item Type