1. Settings
  2. Advanced Settings
  3. Linking Devices

1. Settings

All settings are described in the Main Menu section, however, the more commonly altered settings are described in more detail below.

TIme & Date

The date and time are used for the Boost Timer and the savings calculations and therefore should be set correctly.

In the event of a power-cut, eddi will still keep track of the time and date for a few days, so when power is restored the clock will not need to be reset.
Time is always in 24-hour format but the date format can be changed.

eddi will automatically adjust the clock for Daylight Savings Time (DST) as long as Auto DST is enabled and the correct time zone is selected.


The priority for heater outputs can be set to Heater 1 or Heater 2. The priority heater will be heated first with the surplus power and only when fully heated will eddi start to divert power to the lower priority heater.

eddi will switch back to the priority heater if it has cooled and the thermostat for the heater is closed.

When heating the lower priority heater, the Check Period sets how often the priority heater is checked to see if it can store any more heat.

If the Relay & Sensor Board is installed and temperature probes are used, eddi will immediately switch back to the priority heater if the temperature drops by more than the set Hysteresis. The Hysteresis can be set in the Temperatures menu of the Relays & Sensors menu option.


The heater icons shown on the main screen can be individually set for both heater outputs. This gives an installation specific, graphical representation which heater is active. For example; Heater 1 could be a hot water cylinder and Heater 2 could be a radiator. This function can be accessed via the Settings/Display/Icons menu.

As well as being able to customise the heater icons, it’s also possible to change the generation type from solar to wind.

2. Advanced Settings

The Advanced Settings menu is passcode protected.

The default passcode is 0 0 0 0 although it can be changed with the Passcode menu option.

Supply Grid – Phase

The Phase setting is only used when installing the eddi in a 3-phase property.

It should be set to match the phase number that the eddi is wired to so that the power measurements are correct and that the eddi responds to the correct phase when using the harvi wireless sensor.

See Three-Phase Systems and Supply Grid – Net Phases for more information.


Supply Grid – Device Limit

Sets the maximum current that the eddi will draw (including when boosting). This is useful if the supply current is limited, like a 13A fused spur rather than a 16A MCB.

Supply Grid – Grid Limit

Sets the limit that can be drawn from the grid connection (i.e. the maximum import current or the main fuse rating). Grid Limit is a global limit; all the myenergi networked devices will be included when limiting.

Example: A property has a grid supply limit of 65A, several appliances are on and the property is consuming 12kW (52A) by other appliances and the user wants to boost the water heating. If the water heater is rated at 3kW (13A), the total consumption would exceed the allowed import current. However, with a Grid Limit setting of 60A, eddi would limit the power to the heater to 1.8kW (8A) and therefore the maximum allowed import current would not be exceeded.

Supply Grid – Battery

If the property has a static AC battery system installed, it’s possible to get the eddi to work in harmony with the system, provided a CT has been installed to monitor the battery inverter.

See Battery Storage Systems for more information about battery storage systems.

Setting Function Description
None There is no battery system installed.
Limit to Gen Will limit the output of the eddi (except when boosting), to prevent unwanted draining an AC coupled battery system. This setting does not require a CT to monitor the battery, but does need a CT to monitor the solar/wind generation.

Note: This setting is to support legacy installations – it is preferable to install a CT to monitor the battery and use one of the settings below.

Avoid Drain Stops the eddi (or other linked myenergi devices) draining the battery when using surplus power from the solar or wind generator.
Avoid Charge Effectively allows the eddi (or other linked myenergi devices) to take priority over the battery when charging from solar or wind generation.
Avoid Both Provides both of the above functions.

Supply Grid – Net Phases

When enabled, all readings from 3-phase myenergi devices and harvi units configured as 3-phase, will be netted. This means that surplus generation on ANY phase will be considered to be available for consumption on ANY other phase.

See Three-Phase Systems for more details about myenergi devices on 3-phase supplies.

Supply Grid – Exp Threshold

This is the amount of export that must be exceeded before eddi starts diverting power to the heater loads. Once diverting starts all the surplus power, less the Export Margin (see below) will be diverted to the heater load.

Supply Grid – Response Delay

This setting gives a delay before eddi starts to divert power (after the Export Threshold is exceeded).

The default setting is 0s (zero seconds), however, if there is an AC-side battery storage system installed at the property, this may need to be increased. For example, the storage system will be trying to charge the batteries with the surplus power, but because eddi is very fast, the surplus power would have already been taken-up by eddi. This may be undesirable as it would usually make more economic sense to store the energy in the batteries as priority. By introducing a small Response Delay (say 5 seconds), the battery system is given chance to respond before eddi does.

Supply Grid – Export Margin

This sets a minimum level of export power which is maintained when eddi is diverting surplus power to the heaters. Normally Export Margin would be set to 0W (zero Watts) and all of the available surplus will be diverted to the heaters, however, it is sometimes desired to have a minimum export level at all times.

CT Config

The CT1 and CT2 inputs are configured depending on the connected CT sensors. The internal CT which measures the output current also has some settings.

Note: These settings are the same when using CTs with the harvi device, however, they are set via the Linked Devices menu rather than the CT Config menu.

Important: There must by only one Grid CT set (per phase) for the whole installation.


CT Description
CTIL This is the internal CT which measures the output current of the eddi.
CT1 CT1 input.
CT2 CT2 input.


CT Type Description
None No CT connected.
Grid Grid CT monitors the import and export power of the property, this is main control CT and there must only be one Grid CT set for each phase.
Generation Only Monitors Solar PV or Wind generation.
Storage Only Monitors a device that can ‘store’ energy (e.g. a third-party energy diverter) and enables the eddi to take priority over it. The power used by the third-party device is considered as surplus power unless the device is intentionally using grid power (i.e. it is boosting).
The CT should be installed on the Live supply cable feeding the diverter, with the arrow pointing away from it.
Gen & Battery Monitors Solar PV or Wind generation that is combined with a DC-coupled battery.
Monitor Monitors any load, for example a washing machine or the lighting circuit.

This setting can also be used to limit current drawn by myenergi devices on a particular circuit which includes other loads – see Load Balancing / Current Limiting for more details.

AC Battery Used to monitor an AC-coupled battery.

With this setting it’s possible to manage the distribution of surplus energy between the battery and the eddi (including myenergi devices).
The Battery setting in the Supply Grid menu is used to configure how the eddi will operate alongside the battery system – see Battery Storage Systems for more information.

The CT should be installed on the Live supply cable of the battery inverter/charger, with the arrow pointing away from it.

CT Groups

CTs can be put in groups so that their readings are netted. For example, you might want to monitor two solar PV systems and see the total generation on the display. Use Group in the CT Config menu to set which group the CT should be in.

Note: Different CT Types cannot be in the same group, the group names make this clear. Only the first 4 groups can be used for current limiting, see Group Limits below.

Group Limits

Current limits can be set for certain CT Groups. When a Group Limit is set the myenergi devices in the group will limit the power they draw to keep within the set limit.

Group limits should be set only on the master device – see Linking Devices for details about master devices.

It is possible to use more than one group limit type (e.g. IL1 with MN1, so that there are two conditions for limiting).


Group Limit example Additional CT installed CT config (all devices)
Limit current drawn by two eddi devices that are on the same 20A supply. None; the internal CTs are used. CTIL
Type: Internal
Group: IL1
Group Limit: 20A
Limit current drawn by an eddi device that is fed from a 25A supply which is also feeding another appliance (e.g. a tumble dryer). One CT is clipped around Live of the 25A supply and wired to CT2 of the eddi. CT2
Type: Monitor
Group: MN1
Group Limit: 25A
Limit current drawn by two zappi devices that are in a garage which is fed from a 40A supply. A washing machine and dryer are also in the garage. One CT is clipped around Live of the 40A supply to the garage and wired to CT2 of one of the zappi units.

Note: The other zappi does not need to have a CT connected, but it will still need to have a CT input configured to be in the same Monitor group.

Type: Monitor
Group: MN1
Group Limit: 40A

3. Linking Devices

Up to six myenergi devices can be wirelessly linked together. By linking devices, you can use more of your own energy or have more control and visibility. Devices available now (or soon to be available) are:

   –   zappi – An eco-smart electric vehicle charge point that can use surplus power to charge the car.

   –   harvi – A self-powered wireless sensor that can be used along with myenergi load controlling devices such as eddi and zappi. It is able to detect grid import/export conditions as well as generation power and send this information wirelessly to devices such as the eddi or zappi, this can greatly simplify installation.

   –   hub – The link between your myenegi devices and the internet, allowing remote monitoring and control via a mobile App.

Master & Slave Devices

When two or more myenergi devices are wirelessly linked, one device will act as the ‘master‘ device. This device will control the other ‘slave‘ devices. Some settings can only be changed on the master device, e.g. Grid Limit and Net Phases.

Use the Set Master function in the Advanced Settings/Linked Devices menu to set which device should be master. It’s a good idea to choose the device that is the most convenient to access should you wish to change settings.

Pairing Devices

Devices are ‘paired’ by selecting Pairing Mode on each device (one device must be set to master).


1. On the slave unit, select Pairing Mode from the Advanced Settings/Linked Devices menu or by pressing the pair button if the device is a harvi or hub.
2. Now select Pairing Mode on the master device.
3. You will now see the SEARCHING FOR SLAVES screen and eddi will be searching for other devices which are on the same channel and are in Pairing Mode.
4. Select the device you want to add by highlighting the appropriate device using the and buttons and then pressing . The device will then be added and the screen will return to the previous menu.
5. The DEVICES screen will then show, listing all the devices in the network. The recently added device will be able to be configured after the (UPDATING) message disappears.



On rare occasions it is possible that there are other appliances operating on the same frequency which could cause interference. If it is not possible to link devices or the connection seems poor, changing the RF Channel may help. To do this make sure all devices are removed from the network by selecting Reset Settings in the Linked Devices menu and then select a different channel with the Channel menu option. Be sure to change the channel on the other devices before attempting to link them.

Removing Devices

A device can be removed by selecting it from the Devices menu and then selecting Remove Device.

Device Settings

Most device types have settings which can only be changed via the Linked Devices menu. For example, eddi and zappi have a setting for priority and harvi has settings to configure its CT inputs – see Device Priorities.

The device settings are accessed through the Linked Devices menu; select Devices then select the appropriate device and press to bring up the devices’ settings screen. Refer to the relevant devices’ instruction document for more information regarding the actual device settings.

Note: After a device has been paired you will have to wait a few seconds for the device to update before the settings can be accessed, the screen will show DEVICES(UPDATING) when this is happening.

Device Priorities

The priority of each, load controlling linked device, can be set from any device with a display. This enables control of how the surplus energy is shared between them. The example below shows one eddi device, two zappi devices and one harvi on the same ‘network’.


1. All linked devices are listen in the DEVICES screen, the device shown in CAPITAL letters is the device currently being viewed.
2. The serial number of the device is shown on the right.
3. The priority is shown on the left of each load controlling device, with 1 being the highest priority. If two or more devices have the same priority, the available surplus (for that priority level) is shared equally between them.
4. The ~ symbol indicates which device has the Grid CT connected to it.
5. If the ? symbol is shown alongside a device, it indicates that communication has been lost from the device.


Linked Devices Information

The current status of all linked devices, can be viewed together in the LINKED DEVICES INFO screen which can be found from the Main Menu.


1. All linked devices are shown on the left.
2. The current device is shown in CAPITAL letters.
3. The priority for each device is shown on the right.
4. THe right side of the screen has symbols to show the status of each device. Refer to the table below.


Grid CT The device has a Grid CT configured (there should be only one)
M Master The device is the controlling device in the network
Boost The device is currently boosting
Max The device is at maximum output power
Min The device is at minimum output power
No Load The device is not able to use surplus power as there is no load
Communication Problem There is no response from the device