Installation
Sensor Installation
Grid Sensor Installation
The grid sensor (supplied) needs to be clipped around
the either the Live or Neutral meter tail of the
electricity supply meter. If using the Neutral conductor,
reverse the direction on the sensor.
The positioning of the sensor is crucial, take note of the
following when deciding where best to install the
sensor:
✔
Can be connected to either the
eddi
(wired
sensor) or
harvi
(wireless sensor)
✔
ALL of the import and exported power must be
'seen' by the sensor – be sure to install it
upstream of ANY junction box or 'Henley Block' (if
can fitted inside the consumer unit)
✔
The arrow on the bottom of the sensor must be
pointing towards the consumer unit
✔
Ensure the sensor is fully closed and clicks shut
✔
Wire to the
CT1
connector of the
eddi
; black [–]
and red [+]
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
eddi
device and its Grid Sensor must be on the same phase.
If the generation is also three-phase and it is desired to consume surplus power on each phase, 3 eddi units can be installed
provided there are suitable loads. Note: it is usually possible to split a 3-phase heating element into 3 individual elements
by removing the links.
It is possible to net the export power across phases if using the
harvi
with three Grid Sensors.
This allows the eddi to use
surplus power from any phase and not just the phase which the
eddi
is installed on. However, you must be sure that 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
eddi
must both be on the same side of the VO;
either the incoming grid supply or the optimised supply.
Battery Storage Systems
Where there is an AC-side battery battery storage system, there can be a conflict as both the storage system and the
eddi
are effectively competing to consume the surplus energy. Whilst this is not necessarily an issue, the results can be
somewhat unpredictable.
There is the option to add an additional sensor to monitor the battery storage; this will give control as to which device has
priority. This additional sensor should be wired to CT2 terminals of the
eddi
or a
harvi
device if wireless is required. And it
should be clipped around the live or neutral cable from battery inverter. (See page 27) . During the setup process it will be
necessary to change the setting for CT2; refer to
CT Inputs
on page 20 for details of the available settings.
26
eddi
operation and installation manual
click
ELECTRICITY
METER
CONSUMER UNIT
GRID SENSOR
Reverse if on Neutral cable
