Kohler
Kohler 26kW RCA
Kohler's air-cooled flagship goes head-to-head with Generac's 26kW and quietly wins the spec that matters for most buyers: 24kW on natural gas versus Generac's 22.5kW. Built on the CH1006 V-twin with PowerBoost starting, it carries large homes — dual AC compressors, well pumps, the works — and owners describe it as the 'buy once' choice in the class. The critical silencer and sound enclosure keep the tone lower and less mechanical than the raw 70 dB figure suggests, though it's still not quiet. Ownership realities: it's a 625-lb unit that needs a serious pad, Kohler/Rehlko dealer coverage is uneven so line up your servicer before you buy, and lead times can stretch after major storm seasons. The 26RCAL variant bundles a 200A transfer switch if you want one quote for everything.
Specifications
Highlights
Pros
- ✓Best-in-class 24kW natural gas rating
- ✓Starts dual large AC compressors with PowerBoost
- ✓Build quality and enclosure hardware a step above the price peers
- ✓5-year/2,000-hour warranty; strong extended options
- ✓Oil and pressure sensors protect the engine automatically
- ✓Fewer reported controller issues than the Generac equivalent
Cons
- ✗70 dB at rated load — plan placement carefully
- ✗625 lbs demands a bigger pad and crane-assisted placement
- ✗Dealer and installer coverage is spotty outside metro areas
- ✗Transfer switch extra on the base SKU
- ✗Post-storm lead times can run months
Compare the Kohler 26kW RCA
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Kohler 14kW RCA
Kohler's answer to the Guardian 14kW, and the one owners pick when they've read enough Generac controller threads. The commercial-grade CH740 V-twin uses hydraulic valve lifters — no break-in, no valve adjustments — and the corrosion-proof aluminum enclosure holds up in coastal salt air where painted steel rusts. It punches above its class on motor starting with 33kVA of surge capacity via PowerBoost, so a 4-ton AC is realistic. Owner sentiment is consistent: the hardware feels a grade above Generac, but the dealer network is thinner, lead times run longer, and the OnCue Plus monitoring app is dated and clunky compared to Mobile Link. Note the honest ratings: 14kW on propane but 12kW on natural gas, and 69 dB in normal operation is louder than the spec-sheet skim suggests.
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Generac Guardian 24kW
Generac's current volume flagship: 24kW on propane and 21kW on natural gas from the G-Force 1000 platform, bundled here with a 200-amp service-entrance transfer switch with PWRview energy monitoring. It's pitched as the 22kW's replacement, squeezing 2.6x the power of the baseline air-cooled units from the same-size enclosure, and owners like that it fits the same pad footprint. Real-world reports are strong — seamless transfers, two-AC homes handled with smart load modules — with noise at 67 dB under load and a much quieter 57 dB Quiet-Test. The complaints are familiar: owners report Wi-Fi Mobile Link dropouts, controller boards replaced under warranty, and dealer-network variability that makes your installer choice as important as the machine. Ships as a complete package, which simplifies quotes compared to the à-la-carte SKUs.