zappi v2Advanced Settings

  1. Advanced Settings
  2. eSense
  3. Linking Devices

1. 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/Phase Rotation

The Phase setting is only used when installing a single phase zappi onto a 3-phase supply.

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

The Phase Rotation setting is only used on three phase units and should correspond to the wiring connected to the input terminals. Only specific options are possible:

  • 1/2/3 (Phase 1 wired into “L1”, Phase 2 wired into “L2”, Phase 3 is into the “L3”)
  • 2/3/1 (Phase 2 wired into “L1”, Phase 3 wired into “L2”, Phase 1 is into the “L3”)
  • 3/1/2 (Phase 3 wired into “L1”, Phase 1 wired into “L2, Phase 2 is into the “L3”)

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

Supply Grid – Device Limit

Sets the maximum current that the zappi will draw (including when boosting and FAST mode). This is useful if the supply current is limited, for instance, if zappi is connected on a 16A circuit instead of a 32A.

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).

Example: A property may have a grid supply limit of only 65A, several appliances are on, the property is consuming 12kW (52A) to supply these appliances and the user wants to charge in FAST mode. Without the Grid Limit set, the total consumption would exceed the allowed import current and trip the supply or blow a fuse. However, with a Grid Limit setting of 60A, zappi would temporarily limit the charging current to 8A (about 1.8kW) and the maximum allowed import current would not be exceeded.

Note: When using a harvi to measure the grid supply, the highest value you can set this to is 65 Amps. The maximum current limit when using a hardwired CT is 100A.

Supply Grid – Battery

If the property has a static AC battery system installed, it’s possible to get the zappi to work in harmony with the system, provided a CT has been installed to monitor the battery inverter. See Battery Storage Systems (page 38) for more information about battery storage systems.

The table below details the different settings for working with an AC coupled battery storage system:

Setting Function description
None Will limit the output of the zappi (except when boosting), to prevent unwanted draining of 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 zappi (or other linked myenergi devices) draining the battery when using surplus power from the solar or wind generator.
Avoid Charge Effectively allows the zappi (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 available for consumption on ANY other phase.

See the Net Metering / Net Phases FAQ for more information on Net Metering.

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

Supply Grid – Export Margin

This sets a minimum level of export power which is maintained when zappi is charging in ECO or ECO+ modes.

Normally Export Margin would be set to 0W (zero Watts) and all of the available surplus will be used to charge the vehicle, however, it may be desired to have a minimum export level at all times. (e.g. when using zappi with a storage battery to ensure that the battery is charged with surplus renewable generation before the zappi starts charging the EV)

CT Config

The 3 CT inputs should be 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, for the harvi they are set via the Linked Devices menu rather than the CT Config menu.

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

Note: CT3 is only available on single phase units with V3.XXX firmware.

CT Description
CTIL This is the internal CT which measures the output (charging) current of the zappi.
CT1 CT1 input
CT2 CT2 input
CT3 CT3 input (V3.XXX firmware only)


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 zappi 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).
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 zappi (including myenergi devices).

The Battery setting in the Supply Grid menu is used to configure how the zappi 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.

Note: CTs should be installed on the Live cable with the arrow pointing towards the consumer unit / “fuse box”

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 (page 25) 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).

Some examples of how to set up the group limits are described in the table below


Group Limit example Additional CT installed CT config (all devices)
Limit current drawn by two zappi devices that are on the same 32A supply. None; only the internal CTs are used. CTIL

Type: Internal

Group: IL1

Group Limit: 32A

Limit current drawn by a zappi device that is fed from a 32A supply which is also feeding another appliance (e.g. a tumble dryer). One CT is clipped around Live of the 32A supply and wired to CT2 of the zappi. CT2

Type: Monitor

Group: MN1

Group Limit: 32A

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

2. eSense

The eSense input can be configured to automatically activate a Boost during ECO or ECO+ charging, whenever economy tariff electricity is available. The eSense input must be wired to a circuit which is live during the economy tariff times for this to function. See eSense Input (economy tariff) for wiring details.

eSense Setting Description
Disabled eSense input is ignored
Boost If the eSense input is live, zappi will boost the charge
Boost Timer Enable zappi will boost the charge if eSense is live AND the boost timer is set to operate at that time.

see Economy Tariff Boosting

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 are:

eddi A microgeneration energy diverter that uses surplus power to heat water or rooms rather than exporting to the grid.
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 myenergi 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, Group Limits 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.

Note that harvi and hub will only pair with the device which is set as the master

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 zappi will be searching for other devices which are on the same channel and are in Pairing Mode. Any devices found are listed along with their unique serial numbers.
4. Select the device you want to add by highlighting the appropriate device using the and 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 settings 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 device’s settings screen. Refer to the relevant devices’ instruction document for more information regarding the actual device’s 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 listed in the DEVICES screen, the device shown in CAPITAL letters is the device currently being viewed.
2. The serial number of each 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 equal priority, the available surplus (for that priority level) is shared equally between them.
4. The ~ symbol indicates which device has the grid CT attached/configured to it. There should only be one on the system.
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. The current device is shown in CAPITAL letters.
2. To the right of each device is the real-time output power level.
3. The priority of each device is shown on the far left.
4. The right side of the screen has symbols to show the status of each device. Refer to the table for the meaning of each symbol.


Grid CT The device has a Grid CT configured (there should be only one)
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