Discharge Management; Pid Recovery Function - Sungrow SH8.0RS User Manual

3 Function Description
Normal Charge Management
When the battery voltage is within the normal range, the inverter can charge the battery if
the PV power is higher than the load power and can ensure that the battery is never over-
charged.
The maximum allowable charge current is limited to the smaller value among the following:
• the maximum charge current of the inverter (30A);
• the maximum / recommended charge current from the battery manufacturer.
For this reason, the battery charge power may not reach the nominal power.
• If the PV voltage is higher than 900 Vthe upper limit value of MPP voltage(560
V)450 V, the battery cannot charge.
• The hybrid inverter will start to charge the battery when the export power value
exceeds a pre-defined threshold value of 70 W.

3.3.2 Discharge Management

Discharge management can effectively protect the battery from deep discharging.
The maximum allowable discharge current is limited to the smaller value among the
following:
• the maximum discharge current of the inverter (30A);
• the maximum / recommended discharge current from the battery manufacturer.
For this reason, the battery discharge power may not reach the nominal power.
• If the PV voltage is higher than 900 Vthe upper limit value of MPP voltage(560
V)450 V, the battery cannot discharge.
• The hybrid system will start to discharge the battery when the import power
value exceeds a threshold value of 70 W.
3.4

PID Recovery Function

The inverter is equipped with PID phenomenon recovery function to improve the PV power
generation. During the power generation process, the inverter could carry out a main Anti-
PID function without any influence to the grid side thanks to a particular technology.
• P-type panels
The PID recovery function only applies to P-type panels. When it is enabled, the inverter ris-
es the potential between the negative pole of PV arrays of P-type panels and the ground
through PID module, to recover the PID effect.
24
User Manual