KOHLER Energy Management
Kohler Generator Monitoring
How much does KOHLER Energy Management cost?
Prices are current as of 12 Sept 2026.
KOHLER Energy Management has no in-app products on record in the United States.
10+ alternatives to KOHLER Energy Management
| KOHLER Energy Management |   Mobile Link for Generators |   Hydrawise |   Moen Flo |   Nee-Vo |   Big Ass Fans |   Rain Bird 2.0 |   FloLogic |   iFLO |   OvrC Connect |   Generac Field Pro | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Rating / 5 | 4.7 | 4.8 | 4.7 | 4.3 | 4.8 | 4.8 | 2.0 | 4.9 | 3.2 | 3.2 | 3.2 |
| Reviews | 598 | 94K | 89K | 22K | 11K | 2.6K | 794 | 400 | 94 | 26 | 21 |
| Released | 2024 | 2014 | 2023 | 2020 | 2016 | 2019 | 2024 | 2018 | 2023 | 2016 | 2025 |
| Monthly price | — | $7.49 | — | — | — | — | — | — | — | — | — |
| Annual price | — | $74.99 | — | — | — | — | — | — | — | — | — |
The going rate for each plan in United States, in its own currency, shaded from the cheapest price on the row to the dearest.
KOHLER Energy Management reviews
4.7 out of 5, based on 598 reviews.
What people like
- Helpful customer service walks you through setup.
- Works well after updating generator firmware.
- Lets you control energy system from phone.
What they complain about
- Generator often goes offline unexpectedly.
- Can't fix errors or change time remotely.
- Customer support is unhelpful and slow.
Manager on my phone
Kohler’s Energy Management System is the best, it lets me know what is happening with my energy system wherever I am I can control it from my phone!
Web site will not come up.
I just paid almost $16,000.00 for this unit and I cannot get the website to download on my phone I do not know what I’m doing or not doing. I’ve downloaded many websites in my day and I’ve never EVER had one not respond like this isn’t. I trust that generator works better. My dealer was absolutely outstanding. Todd and Phil are outstanding men.
App doesn’t work
I have 2 of the same genny’s. One lets me change exercise times and the time of day. The other won’t let me adapt of change any of that. Not sure if it’s a firmware or older board (one is 2 years older). Please assist.
Stop exercise
You’ve probably received this comment dozens of times, but I just realized that I can’t stop a scheduled exercise that has already started. The cops were here and they wanted me to stop it. Embarrassing.
Several functions do not work
The app has several flaws. 1) Under the exercise menu it shows that you can edit the date and time of the exercise program. It does not work. It says it’s saving the changes but it simply does not. 2) Under the controller menu it shows you can edit the date and time. I’m away from home and due to daylight saving I tried to charge the time to correct it. But it won’t save the corrected time. 3) Another big issue is due to the extreme cold weather the generator failed to start for the weekly exercise and sent an error code. The app will not allow to clear the error. I had to bother a family member to go to my house and manually access the generator to clear the error. I find not being able to clear an error remotely very disappointing, disruptive and rendered the generator useless.
Koehler app
Great app keep you informed
HORRIBLE APP
Someone needs to be fired. For sure the person whose idea it was to switch from a functional app to a TOTAL NON FUNCTIONAL APP. Same username, same password of always used. Cannot sign in. This is the hardest app I’ve ever had to deal with. It’s total garbage. Hard to navigate. PLEASE GO BACKTO THE PREVIOUS APP.
Cannot connect to servers- unless you know this
OnCue had no problem maintaining reliable connection but since Rehlko switchover, my generator remains “disconnected” and I’m unable to monitor. Very frustrating as online support or the call in #’s are always busy or no response. Then I put my generator on a DMZ and figured out the App uses port 1024, so unless port 1024 is unblocked or forwarded, the App will not work.
Mediocre app at best
This app is not great at all. The invite user link does not work and when you select to send feedback, the app brings you to a Microsoft page that says the form does not exist. Additionally, there is not a practical way to have a user login because while I have the generator serial number, I don’t have a PIN. Even the installer struggled with this and had to basically reinstall the generator.
Improving
I used the OnCue app for about 10 years and found it adequate. The early version of KEM didn’t seem to have full functionality. I still don’t see where I can add people to get notifications without giving them full control via “location users”…and the location users functionality doesn’t work. I can invite people, but their invitation link doesn’t work. Then when I try to delete their invitation and add a new user, the old pending invitation pops back up. I also don’t see an obvious way to provide feedback on the application in the app. It needs a lot of work.
Installation
Two days ago I purchased my generator … Today is Friday, Both Technicians showed up before the scheduled time, we talked about exhaust diffusion should be out of the back. We talked about the propane tank placement. And next thing you know, the propane tank was delivered while the generator was being installed. After the installation, they ran the generator auto start test, I signed off on the documents and downloaded the App . I’m So Pleased with the outstanding service.
Offline
Offline over a day
Works Great
I was okay with the OnCue App and didn’t bother to download the new app (this app) because of all the bad reviews. Today I downloaded the new App on my iPhone 16 Pro to test it out. Once downloaded, I created a new account without any issues. I linked the generator to the new app via the OnCue generator credentials. This was easily done via a link button in the new app. After everything was linked and I logged in all my generator history and current status appeared and it showed me my next maintenance due date. I can’t complain. Everything looks at least as good as on the old OnCue app. I then downloaded the app onto my iPad Pro, logged in, and everything was there. If there are glitches, I haven’t seen them yet. *** UPDATE *** Today, my generator went offline. I’m connected via ethernet cable, so it’s not my WiFi. I checked my cables and all is good. Other than my ISP going down, this is the first time that my generator has gone offline since I first connected it - about 2 years. I’ve been using OnCue all that time. The weird thing is that if I turn my generator status from AUTO to OFF, I get a message in my Activity Log. But when I go back to AUTO, there is no notice that the generator if back in Standby. I did this twice. Not sure how some messages got to my phone if the communications to the generator is interrupted. I contacted the developer. I’m waiting to hear back. I went from 5 to 3 stars. UPDATE 2 *** It took a while, but since I updated my firmware, I have not had any issues. It’s been online now for a couple of weeks without error. All notifications are working.
Unreliable!
There is no correspondence between what the app says and what my DC2 controller indicates. I started a manual exercise and tried using the app to stop it; the app said it was stopped but the generator was still running!! Then the app said my next exercise was scheduled but the controller said no exercise scheduled! This does not give me confidence to use this app. OnCue was better.
Not an improvement over the previous app
This app moves backwards with communication capabilities over the previous. When we lose power in our area, we also lose internet service. When the power is restored and internet is restored, it’s a guess whether connection with the OnCue server will also be restored. Twice now after power / internet service was down and restored, the connection with the server was not restored. Even after multiple attempts at completely shutting down and restarting the network, no success. To restore the connection, I have to perform a “pretend” firmware update on the generator and both times, that process restored the connection. I never had to do this with the old OnCue app.
Good functioning app
I’ve been using this app for 1 year now, and I must say it has operated and functioned very reliably. No lag, functions work as described, no glitches, no offline time. I have a top tier residential HVAC system, and that company’s app is totally terrible. Kohler energy management app is reliable. Thanks for the great end user experience!!
Great when it works but lacks features
Scheduling doesn’t work half the time. Never updates. Easier to just go out and do it yourself at the controller. Server doesn’t respond over half the time. This app/server needs work. Cellular connection always drops.
Warning alert
Not sure if it’s related to the update, but I have a “Warning April 23, 10:32:50 pm, that Maintenance is required”. No other details. Maintenance was done by the technician when it was due, so I’m not sure why this would pop up.
Nostalgia
Using this app makes me feel like I’m on the internet in 2005.
Improving
This app is slowly getting better. Notifications seem to be working now and the app has gotten faster. The new firmware available on the web site helps with generator connectivity.
A very good App
The On-cue system was a complete joke and never connected. I found the new app to be very helpful —all the information that people have complained about not being there is in the app. I have instant update status of generator running whether I’m home or not. Online time is pretty near 100%. I have a direct wire from the router to the controller board.
Terrible app, disconnected from the generator and won’t reconnect
The Kohler Energy Management app is a terrible replacement for the prior app, On Cue. This app disconnected from our generator, and there is no way we can figure out to reconnect it. Our contractor says to contact Kohler, and Kohler says to contact the contractor. Very frustrating.
Poor customer service
The app, after updates, disconnects, etc. now works but I cannot reset the controller clock from the app as advertised. I emailed customer “service” and received the standard “we’ll get back to you within 48 hours”. That was 2 weeks and a follow up request from me - ago. My confidence is low. The machine has always come through when needed. They should hire a new bunch of whiz kids to FIX THE APP.
On verra bien
One vue fonctionnait pourtant bien
Good app.
Excellent generator. Good app.
Unable to update Controller Time
Personally I found the old OnCue app more reliable/stable from reading parameter info to performing change requests to generator. This app has improved over the last year but one issue I still have is submitting a time change request. Twice a year I have to manually adjust the time on the generator (RES20A-installed 2016) due to DST. Request either time outs after 3-5 minutes or simply returns to main screen with the time set to what it was prior (no change). Frustrating.
Activity log is one hour ahead
This issue has come and gone and now it’s back again with latest 1.2.8+20594 release and repairs to Rehlko servers. We are in Central time zone currently Daylight saving time and log entries back to Day 1 of commissioning 3 years ago show as an hour later than they should be. The previous OnCue Plus app reads correctly so it seems it might be an Energy Management app problem. Please fix this and I will change my rating; this is the only bug left that I know of.
Great App
I have had a great experience with the app, it has worked perfectly for the past year and half. And they update the app regularly fixing bugs every now and then. The people that are complaining are most likely having internet and WiFi problems. I live way out in the country and have Starlink and everything works fine. I never used OnCue so I can’t speak for it, but this app works great.
No longer useful
Didn’t work for a month! Then you now can’t schedule maintenance runs! Called for assistance and was told that feature is no longer available.
Generator keeps disconnecting
I'm enjoying your new iPhone App from the day it was publicly launched but I have an issue. My generator loses connections every few weeks. I have to turn off the breaker and disconnect the battery to re-establish it. There is no other solution. No changes were made to my network infrastructure.
Kohler Generator
Just bought a Kohler backup generator and had it installed. Had a few minor hiccups, installed the app, had to call and the customer service representative was very helpful. Walked me thru the entire setup and it works as it should. Very pleased.
App is terrible except for newest units, ignore basic functions
This app, developed after a PE company took over the generator unit is a disaster. For all but the newest generators you can no longer edit the exercise time and they still refuse to enable a simple daylight savings time code update. The only way to use this app for older generators is to is to buy an $1100 updated card, no wonder people hate PE takeovers.
Donné disponible
Il devrait avoir un relevé de l'utilisation par jour par mois ect. Le nombre d'heure de fonctionnement en mode teste et pendant les pannes. Le nombre de KW fournis par jour par semaines ect. Merci
Online connectivity
Have had several issues with app not be able to connect with unit. Did not experience this with. Prior app.
NOT reliable. Generator<—>Kohler loses connection requiring generator reboot
After 4 months of frustration after a new generator I've determined this to be a complete failure (1 star). See latest edit (#3). Read through to the updates below. Note that my generator is connected to the internet via a WIRED connection — NOT via WiFi or cellular. Therefore, comments stating that it is a WiFi, or other connectivity issue is incorrect. In summary it is NOT reliable. When it works it’s fine. However, when it doesn’t you’re “in the dark” and WILL require a visit to the generator to fix the problem. Details: In the two months since I’ve had a NEW generator installed, 3 times (about once every two weeks) the APP says that it cannot communicate with the generator and retrieve current status or issue “alerts”. I.e. the generator is reported as “offline”. This is NOT a local network issue with my LAN/internet as 1.) the APP can communicate with Kohler (or whatever the app communicates with), and 2.) the generator can talk with my LAN/internet (verified via IP address). A reboot of my internet service doesn’t fix the issue — i.e. having the generator re-establishing a connection to the internet/Kohler. In both instances, only a reboot of the generator via the “reboot” option immediately fixes the problem. So if you rely on this APP and its infrastructure to monitor your generator, you’ll be disappointed. EDIT #1: after the 3rd “connection loss” in the 2 months since the generator was installed I’ve given up rebooting the generator. Just watching to see when it is restored. Generator is fine — does its exercises, etc. Downgrading by 1 star. EDIT #2: after nearly 30 days being offline I decided to do my own [networking] “problem determination”. a.) First, I noticed that the generator “hangs on” to its last DNS assigned IP address. Common usage with certain devices. The downside is that upon a network/router reboot, the generator isn’t obtaining a NEW IP address and the current one it has is/probably invalid. Solution: assign a “static” (DNS reservation) IP address to the generator’s MAC address in the router. Reboot both and the generator will always be assigned that address. Work’s fine. However, it will still lose connection hours, days, etc. later. b.) computer devices will generally reconnect when the internet connection is lost and then restored. E.g. unplugging the wire or rebooting the router. The generator will not do this unless it is given a “hard” reboot — when it is “forced” to reconnect. Therefore, in my opinion, the fault lies in the firmware (currently V3.04) within the generator that is maintaining the connection. The APP is fine — as long as the generator’s connection is maintained. Kohler Home Energy has been contacted, and detailed information provided, as per their “Developer Response” to assist in solving this problem. Edit #3 (27-Nov): I finally determined the source of _my_ "offline" issues. The Kohler app infrastructure (i.e. servers) continually _updates_ the _generator's controller_ to communicate with a _different_ [OnCue] server IP, which is then also recorded in the database that the app communicates with. Once they go out of sync, you're DOA and will require a reboot of the generator to get them back into sync. This was determined by monitoring the IP addresses in both the generator (OnCue server) and what the app reports (Connected IP address) for over a week. I found that (in my case) four (4) different server IPs (x.x.55.225, x.x.152.229, x.x.147.23, x.x.40.191) were used. Think of it as telephone numbers between you and another person that keep changing. The updating occurred at varying intervals ranging from several times a day to at least daily. It was OK for about a week and then when they went out of sync, I got a hard "offline", which never recovered. Note: the above observation(s) have been provided to Kohler support. So when you get the "Offline" status check _both_ (generator and app) IP addresses. If they are different, that's the problem.
First Kohler, then OKTA, now Rehlco
Make up your mind! Kohler keeps changing the sign in requirements. Ever since they switched to Rehlko or whatever it’s called, I’ve been logged off my generator via the Kohler Energy Management app! That has been since Oct 21, 2025! Calls to customer service are ZERO help - the individuals I have spoken to - after 45 minutes on hold, know nothing about how to get connected. All they know how to do is insinuate that it’s something I’m doing wrong. The app worked at first. Then they started using OKTA for sign in. That took a few days to figure out but it worked. Since Oct 21, nothing.
KOHLER Energy Management FAQ
- Is KOHLER Energy Management free?
- Yes. The app is free, in all 175 countries it sells in, and it sells nothing inside it.
- Does KOHLER Energy Management have a free trial?
- No. None of its offers (US) come with a free trial.
- What are the best alternatives to KOHLER Energy Management?
- Mobile Link for Generators (4.8 from 93,600 reviews, premium from $3.39), Hydrawise (4.7 from 89,139 reviews) and Moen Flo (4.3 from 22,338 reviews).
KOHLER Energy Management download
Last updated 1 month ago.
KOHLER Energy Management sells in 175 countries. It was released 2 years ago, on 12 Sept 2024. It holds a 4.7 rating from 598 reviews.
Supports 1 language: English.
How much does KOHLER Energy Management make?
Third-party estimates for the last 30 days, worldwide — not the store's own figures, which Apple publishes for nobody.