zappi -32A1P1T05 Operation & Installation Manual page 27

Extending the sensor cable
If there is a need to extend the sensor cable, twisted-pair cable like CAT5 or telephone cable must be used. DO NOT use mains
cable, bell wire or speaker cable. It is important to use only twisted-pair cable to maintain signal integrity. The cable can be
extended up to 100m.
Three-Phase Systems
If the supply is three-phase, the
It is possible to net the export power across phases if using the
surplus power from any phase and not just the phase which the
electricity is metered in such a way as to allow this.
Voltage Optimisers
If there is a voltage optimiser (VO) installed at the site, the sensor and the
either the incoming grid supply or the optimised supply.
Battery Storage Systems
Where there is an AC-side battery storage system, there can be a conflict as both the storage system and the
effectively competing to consume the surplus energy. Whilst this is not necessarily an issue, the results can be somewhat
unpredictable. To prevent this unpredictable behaviour, It is necessary to install an additional sensor to monitor the generation
or the battery system, this will give control as to which device has priority.
This additional sensor should be wired to CT2 terminals of the
clipped around the Live cable from the battery inverter. (See page 28) . During the setup process it will be necessary to change
the setting for CT2; refer to CT Inputs on page 19 for details of the available settings.
The table below shows the sensor positioning and CT2 Input setting required to for the priorities to function as required.
Priority Display
Battery Generation Power is displayed
Storage above the generation icon on
System the main screen
EV Charging No addition information of the
display
Third-Party Diverters
If there is a third-party energy diverter on site, it may be desirable for
be achieved by installing an additional sensor connected to the CT2 input. The sensor should be clipped onto the supply cable
to the diverter with the arrow pointing towards it. The CT2 Input setting should be set to Storage.
Wireless Sensor Installation
In some cases it can be difficult or impractical to install a wired sensor. For example it may be
the case that the zappi
consumer unit and two consumer units are in different buildings.
The solution to is to install
products to be installed without using a wired sensors for measuring the grid and or
generation power; instead the sensor is connected to
harvi – the energy from the sensor is harvested and used to transmit the measurement signal
to the zappi or eddi . This means batteries or electrical wiring are eliminated!
Up to 3 sensors may be used with
Sensors, it also supports 3-phase systems if three sensors are connected.
Refer to the harvi installation guide for details on installing and configuring
operation and installation manual
zappi device and its Grid Sensor must be on the same phase.
Sensor Positioning (CT2)
Live cable to generation inverter (PV or Wind), with the
arrow (L) pointing towards consumer unit.
The sensor needs to 'see' all of the generation on site for
this to function correctly
Live cable on AC battery system, with the arrow (L)
pointing towards consumer unit
(optional accessory)
unit needs to be connected to a sub-board, rather than main
harvi – a clever little device that enables the
harvi so one device can be used with Grid and Generation
harvi with three Grid Sensors. This allows the zappi to use
zappi is installed on. However, you must be sure that the
zappi
zappi or a harvi device if wireless is required. And it should be
zappi to take priority over the diverter. This can usually
zappi
. No power source is needed for
harvi
harvi for your system.
Installation
must both be on the same side of the VO;
CT2 Input Setting
Generation
Storage
and eddi
zappi are
zappi
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