Kohler 12RESVL-100LC12 12kW Generator with 100A 12-circuit Transfer Switch Features:
Kohler 12RESVL-100LC12 12kW Generator With 100A 12-Circuit Transfer Switch
The Kohler 12RESVL-100LC12 12kW Home Standby Generator delivers reliable, clean backup power with a compact footprint and an automatic 100A 12-circuit load-center transfer switch for essential-load coverage. Designed for today’s sensitive electronics and modern home systems, this generator provides clean, stable electricity with low harmonic distortion—perfect for safeguarding appliances, HVAC units, computers, and smart-home devices. Automatic weekly exercising, quiet performance, and a rugged steel enclosure make this generator a dependable, low-maintenance solution for long-term protection.
At the heart of the 12RESVL is Kohler’s Series 7000 KT725 V-twin OHV engine, engineered for strong air-cooled performance and simple fuel conversion between natural gas and LPG. As shown on pages 1–3 of the spec sheet, the RDC2 digital controller manages generator and transfer-switch functions, providing monitoring of voltage, frequency, engine temperature, oil pressure, battery health, and runtime hours. It includes programmable exercise modes, built-in Ethernet for OnCue® Plus remote monitoring, adjustable LCD contrast, and digital isochronous governing for precise output. Fuel consumption remains efficient, using only 6.1 m³/hr NG or 2.9 m³/hr LPG at 100% load (page 3).
This model includes a factory-matched 100A RXT load-center transfer switch with 12 circuit spaces, ideal for powering essential loads such as lights, refrigerators, furnaces, well pumps, sump pumps, and home electronics. The generator’s steel enclosure features e-coat corrosion protection, powder-coat finish, and a hinged locking roof for easy access. The enclosure meets the 181 mph wind rating (page 1) and uses UL 94 HF-1 flame-retardant sound-deadening foam. Quiet operation keeps noise levels to 67 dB during weekly exercise and 71 dB during full-speed operation (page 3). Kohler backs the 12RESVL with a 5-year limited warranty, ensuring long-term performance and durability.
Key Features
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12kW standby power (natural gas or LPG)
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Includes 100A RXT 12-circuit load-center automatic transfer switch
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Kohler Series 7000 KT725 V-twin OHV engine
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RDC2 digital controller with full diagnostics and OnCue® Plus remote monitoring (pages 1 & 3)
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Clean, stable power with low THD for sensitive electronics
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Quiet operation: 67 dB (exercise), 71 dB (normal operation)
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Fuel-efficient performance: 6.1 m³/hr NG or 2.9 m³/hr LPG at full load
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Durable steel enclosure with powder-coat finish and 181 mph wind rating
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Hinged, locking roof and through-wall fuel/electrical connections
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Digital voltage regulation ±1.0% RMS from no-load to full-load
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Field-convertible natural gas/propane configuration
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UL 2200 listed; EPA-certified fuel system
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5-year limited standby warranty
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Kohler 12kw
Looks good haven't used it yet but the lock in the lid does not function
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12 kw
Great unit , small footprint highly recommended
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Update One year later
Reviewed earlier about my personal install, etc. but we had a power outage here due to ice storm in February, power was out for 5 days. Kohler generator kicked in like it was supposed to, ran for 103 hours solid, no issues. I shut it down on Friday afternoon, changed oil and filter, fired back up and it ran the rest of the day into Saturday mid day when power returned. Generator shut off perfectly. It runs weekly exercise/diagnostics on schedule with no issues. Service is easy and straight forward for the oil change and I did change out the spark plugs after power returned, easy as well. Now all the neighbors want to know what I have and stuff since I was the only house in the neighborhood with power all week....lol. Highly recommend Kohler. My first reviews is titled Great generator, simple install, did it myself, etc. You won't go wrong with Kohler in my opinion.
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Kohler Kuality (Quality)
I have a neighbor with a frequently advertised brand of Generator.
My new Kohler impressed him compared to the one he purchased.
The Kohler is quieter, starts up faster and has a smaller foot print. He even asked me if I paid extra for the aluminum body.
It pays to shop around. -
Good brand but...
Remember, this is only a backup generator, meant to run for hours, not days or weeks. Being air cooled and running at 3600 RPM’s, it won’t hold up if you have a long term power failure. I had this problem when we had a two week long power failure. Even though I shut it down and did an oil change half way through, the generator now burns oil and doesn’t always start on weekly exercise cycles. If all you feel you need is occasional short term backup power, it’s ok the price.
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Great generator, simple install
Bought here and installed myself. If you have ever done any electrical work like wiring a breaker box etc, it is easy to do. I poured a 36 inch square slab to sit it on. Ran wires and had all conduit ran into basement prior to ordering. Once it arrived, which was right on time, hooking it up was easy to do. Plumbed in gas, hooked up wires the started the swap over to the transfer switch from my main panel. I took my time there, neatly building panel, marking wires, etc. Generator fired up like a charm. Ran a test with several items in the house on and it started my AC unit with barely a change in the sound at the generator. It has ran it's weekly tests as scheduled with no issues. Do some research and you can do it yourself. If your not comfortable, then by all means get an electrician or an installer to do it. Saved money by ordering here due to no sales tax charged.
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No Issues
Our 12kw Kohler generator arrived quickly and in perfect condition. Nice job. Also thanks for the help in sizing the generator it powers up everything we wanted to back up.
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Great Generator
We love our Kohler 12RESVL generator that we purchased from AP Electric. We especially like the compact foot print of the generator. Much quiter than we expected. Nice generator would recommend
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No Problems
No problems on our odereof Kohler's 12RESVL 12kw generator with transfer switch. As promised it shipped the same day we ordered and arrived 2 days later.
