5 Electrical Connection
5.1 System layout of units without integrated DC switch
Local standards or codes may require that PV systems are fitted with an external DC
switch on the DC side. The DC switch must be able to safely disconnect the open-
circuit voltage of the PV array plus a safety reserve of 20%.
Install a DC switch to each PV string to isolate the DC side of the inverter. We
recommend the following electrical connection:
5.2 Overview of the connection area
Objec Description
A DC SWITCH: switch on or off for PV-load.
B DC input: plug-in connector to connect the strings.
C WIFI/GPRS (optional): transmit and receive Wi-Fi or GPRS signal.
D METER/DRM: connect the monitoring device with network cable.
E AC OUTPUT: plug-in connector, connect the grid.
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