zappi v2Advanced Settings
- Advanced Settings
- 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”)
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:
|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)
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.
|CTIL||This is the internal CT which measures the output (charging) current of the zappi.|
|CT3||CT3 input (V3.XXX firmware only)|
|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”
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.
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
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
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.
Group Limit: 40A
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.
|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.|