5.3.1 Export Limit Control
The purpose of the “Export Limit Control” is to limit the power supplied to the grid. The inverter generates electricity
to the grid when the power source is positive, and takes electricity away from the grid when the power source is
negative.
Before using the “Export Limit Control” function, make sure that two meters have been connected to the DataHub.
The purpose of two meters is to control speed and stability. Please refer to the schematic diagram for the specific wi
ring mode (as shown below).
The control mode includes “Total” and “Per Phase”.
“Total”: The Site Limit is the total export power (the combined production mimus the combined consumption) on all
the phases combined. Reverse current on one phase will count as negative power and can compensate for another
phase.
“Per Phase”: For three phase inverter connections, the inverter sets the limit on each phase to 1/3 of the total site
limit. Use this mode if there is a limit on each individual phase.
*Note:
1.The output of device will be abnormal when connecting to three phase three wire under “Per Phase” mode. If tw
o meters cannot be installed or other circumstances arise, please contact our presale service, we will provide you w
ith suitable installation suggestion according to specific local conditions.
2.For “Export Limit Control” function, please ensure that the meter is correctly connected to Datahub.
3.The equipment output may be abnormal if “Per Phase” is used for three-phase and three-wire connection.
4.Inverter shutdown after DataHub communication loss: After communication loss, the inverter will shut down in
10s (triggered once a Datahub communication succeed).
Inverter startup after Datahub communication connection: After communication connected, the inverter will start up
(triggered when all Datahub communication completed).
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