Sungrow SH5K - Page 26

3 Function Description User Manual
18
Tab. 3-3 Emergency Charge Management for Li-ion Battery
Status Conditions
Trigger
Either of the following conditions is met:
y
SOC ≤ (Min. SOC) – 3 % (valid only when the Min. SOC is ≥ 3 %).
y
A battery under-voltage warning is stated on the LCD.
y
An emergency charge command is reported to the inverter. (only
for Sungrow / Bluesun / BYD)
Finish
All the following conditions are met:
y
SOC ≥ (Min. SOC) – 1 % (valid only when the Min. SOC is ≥ 3 %).
y
No battery under-voltage warning is stated on the LCD.
y
No emergency charge command is reported to the inverter. (only
for Sungrow / Bluesun / BYD)
Tab. 3-4 Default SOC Conditions for Li-ion Battery Emergency Charge
Type Trigger SOC Finishing SOC
Sungrow (new system) Not applicable Not applicable
Sungrow (retrofitting system) SOC ≤ 2 % SOC ≥ 4 %
LG / GCL / BlueSun SOC ≤ 12% SOC ≥ 14 %
Pylon (US2000A) SOC ≤ 16 % SOC ≥ 18 %
Pylon (US2000B) SOC ≤ 17 % SOC ≥ 19 %
BYD SOC ≤ 7 % SOC ≥ 9 %
Tab. 3-5 Emergency Charge Management for Lead-acid Battery
Status Conditions
Trigger The battery voltage is under the lower limit (42 V by default).
Finish The battery voltage rises to the final discharge voltage.
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 65 A and the maximum / recommended charge
current from the battery manufacturer.
y If the PV voltage is higher than the upper limit value of MPP voltage
560 V, the battery cannot charge.
y The hybrid system will start to charge the battery when the export
power value exceeds a threshold value of 70 W.