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Myenergi Zappi Manual

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Battery Storage Systems (page 41) 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
There is no battery system installed.
Avoid Drain
Stops the (or other linked devices) draining the battery when using surplus
power from the solar or wind generation.
Avoid Charge
Effectively allows the (or other linked devices) to take priority over the battery
when charging from solar or wind generation.
Avoid Both
Provides both of the above functions. This setting will normally provide the best compatibility
Limit to Gen
Will limit the output of the (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.
When enabled, all readings from 3-phase devices 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 Three-Phase Systems (page 40) for more details about devices on 3-phase supplies.
Note: With a three phase , Net Phases should normally be turned on
This sets a minimum level of export power which is maintained when is charging in ECO or ECO+ modes.
Export Margin would normally be set to 0W (zero Watts) so that all available surplus will be used to charge the vehicle.
In some cases, it may be desirable to always set a minimum export level set. An instance of this would be when using
with a hybrid PV/battery system.
measures current by using a number of Current Transformers (CTs). It is important that these are set up
correctly so knows the different power flows and can control the EV charge rate.
The 3 CT inputs should be configured to match the connected CT sensors. There are further settings for the internal
CT which measures the current being drawn by the EV.
Note: If you have CTs connected to a then these CTs also need to be set up correctly. For a , the CT settings
are found through 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
Function Description
CTINT
This is the internal CT which measures the output (charging) current of the
CT1
CT1 Input
CT2
CT2 Input
… 24 …


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