Kohler 12RES 12kW Generator Features:
Kohler 12RES 12kW Generator – Home Standby Power
The Kohler 12RES 12kW Home Standby Generator delivers dependable backup power, clean electrical output, and proven long-term reliability—all in a compact, installation-friendly design. Engineered to protect today’s sensitive electronics, this generator offers advanced voltage regulation and low harmonic distortion to ensure your appliances, computers, HVAC systems, and smart-home devices run safely during an outage. Its fast response time and quiet, neighborhood-friendly operation make it an excellent whole-home backup solution.
Powering the 12RES is Kohler’s Command PRO OHV CH740 engine, equipped with hydraulic valve lifters and Digital Spark Advance Ignition (DSAI) for optimized performance on both natural gas and LPG. According to the spec sheet (pages 1–2), the system is fully field-convertible between fuel types without sacrificing emissions compliance. The generator’s ADC-RES digital controller provides full system monitoring—including volts, frequency, battery status, runtime hours, and fault alerts—while allowing fine-tuning of voltage, gain, and engine speed for stable, efficient performance.
Built with convenience in mind, the Kohler 12RES includes a polymer mounting base, eliminating the need for a concrete slab and reducing installation time. Through-wall fuel and electrical connections simplify setup, while a durable sound-deadening enclosure and critical silencer keep noise levels to just 65 dB, with a low-point measurement of 63 dB (page 3). Rated for both natural gas and propane operation, this reliable generator delivers fuel consumption as low as 5.4 m³/hr NG or 2.3 m³/hr LPG at full load (page 2). Kohler backs the 12RES with a 5-year/2000-hour limited warranty, ensuring long-term performance and peace of mind.
Key Features
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12kW standby power for essential and whole-home backup
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Kohler Command PRO CH740 OHV engine with hydraulic valve lifters
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ADC-RES digital controller with full diagnostics and system monitoring (page 3)
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Clean, stable power with low THD to protect sensitive electronics
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Quiet operation: 65 dB average, 63 dB lowest measurement
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Field-convertible natural gas or LPG operation
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Fuel-efficient performance: 5.4 m³/hr NG or 2.3 m³/hr LPG at 100% load
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Polymer base eliminates need for concrete pad
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Through-wall fuel and electrical connections for easy installation
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UL 2200/cUL listed and EPA-certified fuel system
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Critical silencer and UL 94 HF-1 flame-retardant sound foam
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Premium 5-year/2000-hour standby warranty
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Kohler 12 RES
Great investment! Was always a fan of Kohler products and this one didn’t disappoint. Solid , quality product. Would recommend to anyone looking for a generator to purchase this product. Apelectric was awesome to work with and experienced no issues with the entire process. Well done.
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12RES
Fairly easy to hook up and runs great. Quiet.
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Great product
Runs and works just as promised
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Great EXCEPT
Has happened 4 times in off grid application. When signal is sent because battery voltage is low, the generator does nothing, or sends a OC which is not true because the gen set does nothing, not good when no one is at the house and temp is 0-F and furnace can't run. big problem!
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Great EXCEPT
Has happened 4 times in off grid application. When signal is sent because battery voltage is low, the generator does nothing, or sends a OC which is not true because the gen set does nothing, not good when no one is at the house and temp is 0-F and furnace can
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Kohler 12 RES
Generator runs well. Nice and quiet. So far, no problems.
