Sungrow SG5.0RS-ADA User Manual page 24

2 Product Description
• Protection Function
Several protective functions are integrated in the inverter, including short circuit protec-
tion, grounding insulation resistance monitoring, residual current protection, grid monitor-
ing, DC overvoltage/overcurrent protection, etc.
DRM ("AU"/"NZ")
The DRM function is only applicable to a single inverter.
The inverter provides terminals for connecting to a Demand Response Enabling Device
(DRED). After the connection, the DRED asserts demand response modes (DRMs). The in-
verter detects and initiates a response to all supported demand response modes listed in
the following table.
table 2-2 Demand Response Mode Explanation
Mode Explanation
DRM0 The inverter is in the state of shutdown.
Feed-in Limitation
Set the feed-in limitation value via iSolarCloud App. When the smart energy meter detects
that the export power is greater than the limit value, the inverter will reduce the output power
within the specified range.
PID Zero
The PID Zero function is applicable for both PV and DC-coupled PV plus storage systems. It
can suppress PID during the day and intelligently repair PV panels damage caused by PID
at night, by relieving or alleviating PV array voltage bias to PV-.
The traditional inverter needs boost circuit to extend the efficient generation time during the
day, and break the symmetry of the PV array to the ground voltage, making it closer to the
negative electrode. In addition, if the traditional inverter runs at night, the PV array to ground
voltage is always limited to the lowest voltage point of the system, which increases the risk
of PID.
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