EMS Controller
Turned on
Ultimate EMS
Intelligent energy management for solar, battery, EV and heat pump
Warning! This app might not work properly.
This app version is currently being tested, and has not yet been reviewed. It might not work as expected.
Be extra careful when installing this app.
Home EMS turns your Homey Pro into a full-featured energy management system. It intelligently coordinates your solar panels, home battery, EV charger and heat pumps to maximise self-consumption and minimise energy costs.
Every evening the EMS calculates a detailed plan for the next day based on the weather forecast, expected solar production and your energy prices. During the day it follows this plan in real-time, adjusting automatically when clouds roll in or your energy use changes. For Tesla owners, the Wall Connector is read directly over your local network for precise, real-time charge control without cloud delays or API rate limits.
Supported devices
Flow cards
Click on a device above to show related Flow cards only.
When...
EMS Controller
Turned off
Ultimate EMS
EMS mode changed
Triggers when the EMS switches to a different operating mode.
Ultimate EMS
Priority 1 not fully achievable tomorrow
Triggers when the forecast shows insufficient solar energy to cover all priority 1 loads.
Ultimate EMS
EV ready for departure
Triggers when the EV has reached the target SoC for a planned trip.
Ultimate EMS
Battery below minimum SoC
Triggers when the battery drops below the configured minimum state of charge.
Ultimate EMS
Dump load activated
Triggers when all priority 1 and 2 devices are satisfied and surplus energy is available.
Ultimate EMS
Dump load deactivated
Triggers when the solar surplus drops and dump loads are turned off.
Ultimate EMS
EMS wants to set EV charge current
Fires every time the EMS calculates a new target charge current. Connect this to the 'Set charge current' action of your EV app.
Ultimate EMS
EMS wants to start or stop EV charging
Fires when the EMS starts or stops charging. Connect to your EV app's start/stop action.
Ultimate EMS
EMS wants to start EV charging
Fires when the EMS wants to start charging. Connect to your EV app's start charging action.
Ultimate EMS
EMS wants to stop EV charging
Fires when the EMS wants to stop charging. Connect to your EV app's stop charging action.
Ultimate EMS
Heat pump switched mode
Triggers once per day when the EMS switches the heat pump between heating and cooling based on the weather forecast.
And...
EMS Controller
Is turned on
Ultimate EMS
EMS mode is Mode
Ultimate EMS
Battery SoC is above Threshold (%)%
Ultimate EMS
A trip is planned today
Ultimate EMS
Heat pump is in Mode mode
Ultimate EMS
Solar is producing
Then...
EMS Controller
Turn on
EMS Controller
Turn off
EMS Controller
Toggle on or off
Ultimate EMS
Set EMS mode to Mode
Ultimate EMS
Plan EV trip: depart Departure time at Target SoC (%)%
Use this action in a Shortcut or Flow to schedule an EV charging session before departure.
Ultimate EMS
Recalculate day plan now
Forces the EMS to recalculate tomorrow's energy plan immediately.
Ultimate EMS
Set EV charge profile to Profile
Ultimate EMS
Set EV fixed current to Current (A)A
Ultimate EMS
Set EV max current to Max current (A)A
Ultimate EMS
Set battery target SoC to Target SoC (%)%
Ultimate EMS
Set dump load to Enabled
Ultimate EMS
Postpone EV charging (load balance)
Temporarily stops EV charging for the duration set in app settings (ev_postpone_minutes, default 30 min). Use this in a flow that monitors per-phase current to prevent overload.
Widgets
Support
Having an issue with this app? Report issues via the developer issue tracker.
What’s new
Version 1.6.14 — Added Bug Report button in Settings → Diagnostics. One click collects all settings, device capabilities for each configured device, live EMS state, planning summary and EV controller status into a single copy-paste block — making it much easier to report issues.
Ultimate EMS
This app can manage your entire Homey.
Ultimate EMS is not compatible with the selected Homey.
Ultimate EMS will install on Homey shortly.
Changelog
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