Kohler OnCue Plus: Controller Compatibility and What It Monitors
OnCue Plus only talks to certain Kohler controllers - and at least one model we stock is explicitly excluded. Here is the compatibility picture before you buy, plus what the system actually gives you.
Kohler sells a generator management system under two names, and the difference matters when you are matching it to a unit you already own or are about to buy:
- OnCue - the management system product itself, listed in our catalogue as the Kohler OnCue Generator Management System.
- OnCue Plus - the newer version, listed as the OnCue Plus Generator Management System, and specifically tied to RDC2, DC2 and VSC controllers.
That controller list is the compatibility gate. OnCue Plus is a controller-level accessory, so a unit with a different controller is not a candidate regardless of its kW rating.
| Controller | OnCue Plus | Evidence |
|---|---|---|
| RDC2 | Supported | Named in the OnCue Plus product listing |
| DC2 | Supported | Named in the OnCue Plus product listing |
| VSC | Supported | Named in the OnCue Plus product listing |
| ADC | Not supported | Kohler 12RES 12RES-QS11 is listed as "No OnCue Plus on ADC Controller" |
Our catalogue carries the Kohler 12RES 12 kW standby generator with an explicit note in the model description: no OnCue Plus on the ADC controller. That is the clearest possible illustration of why this page exists - the generator is a perfectly good 12 kW standby unit, but pairing it with OnCue Plus is not an option.
So the buying sequence is: pick the kW class, then read the controller on that specific model, then decide whether OnCue Plus is available. Doing it in the other order is how a customer ends up with a monitoring kit that has nowhere to plug in.
| Function | What it tells you | Why it matters operationally |
|---|---|---|
| Runtime status | Whether the generator is running, stopped or in exercise | Confirms the weekly exercise actually happened |
| Fault and warning codes | Controller-level fault text rather than a blinking lamp | Turns a service call into a diagnosis |
| Battery and charge state | Battery condition and charger behaviour | The most common no-start cause on a standby unit |
| Maintenance intervals | Hours-based service reminders | Keeps the maintenance log that a warranty claim needs |
| Remote alerting | Notifications when the unit faults while nobody is home | An outage is discovered by the generator, not by the homeowner |
No. Monitoring tells you something is wrong; it does not change the oil, load-bank the unit or replace a failing battery. What it does change is the cost of finding out - a fault that would have been discovered when the power went out is discovered while the power is still on.
For a unit that is part of a business continuity plan, that difference is the whole value. For a single-family standby that is exercised weekly and serviced annually, it is a convenience with a real but smaller return.
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1
Identify the controller
Read the controller designation from the unit's data plate or manual - RDC2, DC2, VSC or ADC. It is not the same as the kW rating.
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2
Check against the supported list
OnCue Plus is tied to RDC2, DC2 and VSC. An ADC controller unit is excluded - our 12RES listing says so explicitly.
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3
Then confirm the kit
Match the OnCue Plus part to the generator model, not just to the controller family, before ordering.
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4
Plan the network path
Remote alerting needs connectivity at the generator location; confirm signal or a wired path during the site survey, not after the install.
Controller compatibility is one selection filter among several. Sizing is covered in standby generator sizing by service amperage, footprint in generator dimensions by kW, and fuel autonomy in generator fuel and tank sizing.
Which Kohler controllers support OnCue Plus?
What is the difference between Kohler OnCue and OnCue Plus?
Can I add OnCue Plus to a generator I already own?
Does OnCue Plus monitor fuel level?
Match the controller before you order the monitoring kit
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