myenergi
myenergi eddi
- HACS component
- Cloud required
- Wi-Fi
- Ethernet
Prices verified October 2026
See more thermostats & heating picks on our Amazon storefront →Our verdict
The solar diverter most UK installs end up with: it soaks up surplus PV generation into an immersion heater or other resistive load instead of exporting it for pennies. Up to 3.68kW into a single heater, and it needs a CT clamp on the grid supply (a harvi wireless sensor if the clamp cable won't reach). It is a UK solar-owner's purchase rather than a general smart home one, and it is fitted by an electrician, so don't treat the £439 as the full cost. The Home Assistant side is a community HACS integration, not an official one, so expect to rely on a maintainer. If you have no solar, this is not for you; a smart immersion controller or a Mixergy tank makes more sense.
What can Home Assistant control on the myenergi eddi?
| Control | Type | What it does |
|---|---|---|
| Sensors | Sensor | Diverted power, grid and generation readings from the eddi and its CT sensors. |
| Operating mode | Select | Select entity for changing the eddi's operating mode from HA, as exposed by the integration's select entities. |
| Settings | Number | Configurable limits exposed as number entities; the device-limit setting may not be reachable on some units. |
Installed through HACS as a custom integration (CJNE/ha-myenergi), then added from Devices & Services. It exposes eddi sensors plus select and number entities for configuring the device. This is a community project, not core HA, and one forum user with an eddi 2.1 reported the device limit setting could not be reached through it, so test any write-side automation before relying on it. The maintainer says there is no support when Octopus is involved.
Specs
| sensing | CT clamp on the grid supply; harvi wireless CT sensor needed if the eddi is more than about 4-5m from the consumer unit |
|---|---|
| variants | Single-phase (this listing) and 3-phase eddi+ sold separately |
| connectivity | Wi-Fi (two antennae included), controlled through the myenergi app |
| max heater load | 3.68kW maximum, 100W minimum |
How does the myenergi eddi compare?
| Product | From | Protocol | Local control | Integration |
|---|---|---|---|---|
| myenergi eddi (this product) | £439 | Wi-Fi, Ethernet | Cloud | HACS |
| Aqara Floor Heating Thermostat W500 | £69.98 | Matter, Thread, Zigbee | Yes | Native |
| Aqara Radiator Thermostat E1 | £54.98 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Aqara Radiator Thermostat W600 | £49.99 | Matter, Thread, Zigbee | Yes | Native |
Frequently asked questions
- Does the myenergi eddi work with Home Assistant locally?
- Partly. The myenergi eddi connects to Home Assistant through a community integration installed through HACS (myenergi (HACS: CJNE/ha-myenergi)), which relies on the myenergi cloud. It works in Home Assistant, but commands go via the internet and stop working during an outage of your connection or the myenergi service.
- Which protocol does the myenergi eddi use, and do I need a hub?
- The myenergi eddi uses Wi-Fi. To pair it with Home Assistant you need no hub — it joins your Wi-Fi network directly. myenergi's own hub is not required when you integrate through a community integration installed through HACS (myenergi (HACS: CJNE/ha-myenergi)).
- How much does the myenergi eddi cost in the UK?
- The lowest price we have listed for the myenergi eddi is £439 at myenergi. Prices were last checked in October 2026 and change often, so confirm on the retailer's page before buying.
myenergi
myenergi eddi
£439 at myenergi