User Manual
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power.
If the PV voltage is higher than the upper limit value of MPP voltage
(560 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.
3.3.3 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 (65 A);
the maximum / recommended discharge current from the battery
manufacturer.
For this reason, the battery discharge current value may not reach the nominal
power.
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 pre-defined threshold value of 70
W.
3.3.4 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.
The maintenance process is as follows.
1.
Charge the battery with a constant current of 0.165 C, in which C is the
nominal capacity specified by the manufacturer and is indicated in Ah.
2.
Charge the battery with a trickle current when the battery voltage is
stabilized at the average charge voltage.
3.
When the trickle current decreases to 3 A, end the maintenance.
