EMS Controller
Turned on
HEMS (Homey Energy Management System)
Smart EMS for solar, battery, EV and heat pumps
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
HEMS (Homey Energy Management System)
EMS mode changed
Triggers when the EMS switches to a different operating mode.
HEMS (Homey Energy Management System)
Priority 1 not fully achievable tomorrow
Triggers when the forecast shows insufficient solar energy to cover all priority 1 loads.
HEMS (Homey Energy Management System)
EV ready for departure
Triggers when the EV has reached the target SoC for a planned trip.
HEMS (Homey Energy Management System)
Battery below minimum SoC
Triggers when the battery drops below the configured minimum state of charge.
HEMS (Homey Energy Management System)
Dump load activated
Triggers when all priority 1 and 2 devices are satisfied and surplus energy is available.
HEMS (Homey Energy Management System)
Dump load deactivated
Triggers when the solar surplus drops and dump loads are turned off.
HEMS (Homey Energy Management System)
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.
HEMS (Homey Energy Management System)
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.
HEMS (Homey Energy Management System)
EMS wants to start EV charging
Fires when the EMS wants to start charging. Connect to your EV app's start charging action.
HEMS (Homey Energy Management System)
EMS wants to stop EV charging
Fires when the EMS wants to stop charging. Connect to your EV app's stop charging action.
HEMS (Homey Energy Management System)
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
HEMS (Homey Energy Management System)
EMS mode is Mode
HEMS (Homey Energy Management System)
Battery SoC is above Threshold (%)%
HEMS (Homey Energy Management System)
A trip is planned today
HEMS (Homey Energy Management System)
Heat pump is in Mode mode
HEMS (Homey Energy Management System)
Solar is producing
Then...
EMS Controller
Turn on
EMS Controller
Turn off
EMS Controller
Toggle on or off
HEMS (Homey Energy Management System)
Set EMS mode to Mode
HEMS (Homey Energy Management System)
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.
HEMS (Homey Energy Management System)
Recalculate day plan now
Forces the EMS to recalculate tomorrow's energy plan immediately.
HEMS (Homey Energy Management System)
Set EV charge profile to Profile
HEMS (Homey Energy Management System)
Set EV fixed current to Current (A)A
HEMS (Homey Energy Management System)
Set EV max current to Max current (A)A
HEMS (Homey Energy Management System)
Set battery target SoC to Target SoC (%)%
HEMS (Homey Energy Management System)
Set dump load to Enabled
HEMS (Homey Energy Management System)
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 1.6.8 — added support for multiple inverters
HEMS (Homey Energy Management System)
This app can manage your entire Homey.
HEMS (Homey Energy Management System) is not compatible with the selected Homey.
HEMS (Homey Energy Management System) will install on Homey shortly.
Changelog
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