The Kohler RXT is Kohler's advanced residential automatic transfer switch with built-in load management and digital communication with the generator controller (RDC2/DC2). Unlike the simpler RDT, the RXT integrates intelligence that monitors real-time generator output and automatically manages loads without add-on kits.
When utility power fails, the RXT communicates digitally with the generator to start, monitors voltage/frequency lock, transfers the panel, and actively manages load priority throughout the outage. When utility returns, it retransfers and coordinates cool-down with the controller.
The RXT's integrated load management board handles up to 6 loads:
4 customer-supplied non-essential loads (pool pump, EV charger, dryer, etc.)
2 independent HVAC systems
When generator output approaches capacity (monitored via current and frequency), the RXT automatically sheds non-essential loads in programmed priority order — no external kit, no additional wiring beyond the managed circuits.
RCA14, RCA20 (note: an RCL24 draws ~100A continuous at 240V — use RXT 150A or 200A for genset-side headroom)
150A / 200A service
RXT 150A or 200A
RCL24, RCL30, RCL38
300A service
RXT 300A
RCL38, RCL48
400A service
RXT 400A
RCL48, RCL60
Important: The RXT requires a generator with the RDC2 or DC2 controller. All current-production Kohler residential generators include this. If you have an older Kohler unit, you need the RDT instead.
RXT (advanced): Digital controller integration, built-in load management, OnCue Plus native. Requires RDC2/DC2 generator. Best for new installations with current-production generators.
RDT (universal): Simpler 2-wire-start switch, compatible with any Kohler generator (including older models). Load shedding available via add-on kit only. Best for retrofits, older generators, or when you want universal compatibility.
For new OnPoint installations with current Kohler generators, we default to the RXT for its native load management and full OnCue Plus monitoring integration.
The RXT installs in the same position as any residential ATS — between the utility meter and the main panel (service-entrance position) or adjacent.
Key considerations:
Generator compatibility: verify RDC2/DC2 controller before specifying RXT
Load management wiring: managed circuits require dedicated conductors to the RXT
OnCue Plus: comes integrated — remote monitoring via web/iOS/Android is standard
Transfer time: approximately 10 seconds from utility loss to generator power delivery
Exercise scheduling: programmed via the RDC2 controller interface or OnCue Plus app
Frequently Asked Questions
What amperage sizes does the Kohler RXT come in?
The RXT series is available in 100A, 150A, 200A, 300A, and 400A configurations. All sizes are available in both standard and service-entrance-rated versions. The 200A SE model is the most common for residential installations.
What's the difference between the RXT and RDT?
The RXT is Kohler's advanced ATS that communicates digitally with the generator's RDC2/DC2 controller. It has built-in load management (up to 6 loads) without add-on kits. The RDT is the simpler universal switch that works with any 2-wire-start Kohler generator but requires an add-on kit for load shedding.
Which generators work with the RXT?
The RXT requires a Kohler generator equipped with an RDC2 or DC2 controller — this includes current-production RCL and RESA series units. It will NOT work with older 2-wire-start-only generators. For older generators, use the RDT instead.
Does the RXT have built-in load management?
Yes — the RXT has a combined interface/load management board that manages up to 6 loads (4 customer non-essential loads + 2 HVAC systems). It monitors generator current and frequency in real-time and automatically sheds non-critical loads to prevent overload. No add-on kit required.
Can I use the RXT with a non-Kohler generator?
No — the RXT requires digital communication with a Kohler RDC2/DC2 controller. It is not compatible with non-Kohler generators or older Kohler units without the RDC2. For universal compatibility, use the Kohler RDT instead.
Found in these gensets
Generator models that ship with or are commonly paired with the Kohler RXT Series Transfer Switch.
Kohler
Kohler 14RCA
Entry-level Kohler standby at 14 kW -- Kohler CH740 V-twin with Decision-Maker controller. Quieter than most air-cooled competitors.
14 kW standby · Natural Gas / LPG · Air-cooled
14 kW residential standby for small-to-medium homes on natural gas or propane. Covers standard HVAC, kitchen, and essential circuits.
14 kW residential air-cooled standby generator. Kohler's entry-level whole-house backup on natural gas or propane.
Single-phaseresidential-smallwhole-house-basic
Kohler
Kohler 20RCA
20 kW air-cooled standby -- Kohler CH1000 V-twin at 3600 RPM. Decision-Maker controller with mobile monitoring and self-test.
20 kW standby · Natural Gas / LPG · Air-cooled
20 kW whole-house residential standby on NG/LP for medium homes with central A/C, full kitchen, and home office loads.
20 kW residential air-cooled standby generator. Mid-range air-cooled backup for medium homes on natural gas or propane.
Single-phaseresidential-mediumwhole-house
Kohler
Kohler 26RCA
Top-of-line air-cooled at 26 kW -- Kohler CH1006 V-twin. Largest capacity before stepping up to liquid-cooled RCL series.
26 kW standby · Natural Gas / LPG · Air-cooled
26 kW residential standby for larger homes on NG/LP where liquid-cooled cost is not justified but full-house coverage is required.
26 kW residential air-cooled standby generator. The largest air-cooled unit in Kohler's residential lineup for larger homes on a budget.
Single-phaseresidential-largewhole-house
Kohler
Kohler 60RCL
60 kW liquid-cooled residential -- Kohler KG6208 V8 at 1800 RPM. Estate-class capacity with commercial-grade power quality.
60 kW standby · Natural Gas / LPG · Liquid-cooled
60 kW whole-house standby for large estates, multi-structure properties, and high-end homes with heavy electrical loads on NG/LP.
60 kW residential liquid-cooled standby generator. The largest unit in Kohler's residential lineup for mega-estates and multi-structure properties.
