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CTs can be put in groups so that their readings are netted (combined). 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 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 27) 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
devices that are on the
same 32A supply.
None; only the internal CTs are used.
CTINT
Type: Internal
Group: IL1
Group Limit: 32A
Limit current drawn by a
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 .
CT2
Type: Monitor3
Group: MN1
Group Limit: 32A
Limit current drawn by two
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 units.
Note: The other 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.
CT2
Type: Monitor
Group: MN1
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 page 34 for wiring details.
eSense Setting
Description
Disabled
eSense input is ignored
Boost
If the eSense input is live, will boost the charge
Boost Timer
Enable
will boost the charge if eSense is live AND the boost timer is set to operate at that
time. See Economy Tariff Boosting (page 14)
3
Note the “Monitor” group is not currently supported by the harvi
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