Sungrow SH3K6 - Discharge Management; Maintenance Management

3 Function Description User Manual
24
Type
Trigger Condition
Finishing Condition
SUNGROW (retrofitting system)
SOC ≤ 2 %
SOC ≥ 4 %
LG (RESU G1/G2)
SOC ≤ 2 %
SOC ≥ 4 %
GCL
SOC ≤ 12 %
SOC ≥ 14 %
Pylon (US2000B)
SOC ≤ 17 %
SOC ≥ 19 %
TAWAKI
SOC ≤ 15 %
SOC ≥ 17 %
BYD
SOC ≤ 7 %
SOC ≥ 9 %
Lead-acid
The battery voltage
is lower than the
lower limit of
under-voltage.
(42 V by default)
The battery voltage
rises to the setting
value of under-voltage
protection value.
Normal Charge Management
When the battery voltage is within the normal range, the inverter could charge
the battery if the PV power is higher than the load power and could ensure that
the battery is never over-charged.
The maximum allowable charge current of battery is mainly limited to the
maximum charge current of the inverter 65A and the maximum / recommended
charge current from the battery manufacturer.
 If the PV voltage is higher than the upper limit value of MPP voltage
560 V, the battery cannot charge.
 The hybrid system will start to charge the battery when the export
power value exceeds a 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 of battery is mainly limited to the
maximum discharge current of the inverter 65A and the maximum /
recommended discharge current from the battery manufacturer.
 If the PV voltage is higher than the upper limit value of MPP voltage
560 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.
3.3.3 Maintenance Management
To maximize the lead-acid battery life, the inverter will maintain the lead-acid
battery every six months, no matter whether the PV power is sufficient or not.
Generally, the maintenance management is only suitable for a lead-acid battery.