Protections, Troubleshooting & Maintenance; Protections - Epever ET4415BND User Manual

5 Protections, Troubleshooting & Maintenance

5.1 Protections

 PV Over Current
The controller will limit charge power in rated charge power. An over-sized PV
array will not operate at maximum power point.
 PV Short Circuit
When PV short circuit occurs, the controller will stop charging. Clear it to
resume normal operation.
WARNING: The controller of ET6420BND may be damaged, when
PV input is short circuit on high-power.
 PV Reverse Polarity
Fully protection against PV reverse polarity, no damage to the controller will
result. Correct the miswire to resume normal operation.
WARNING: Controller will be damaged when the PV array reverse
polarity and the actual operation power of the PV array is 1.5 times
greater than the rated charge power!
 Battery Reverse Polarity
Fully protection against battery reverse polarity, no damage to the controller
will result. Correct the miswire to resume normal operation.
 Battery Over voltage
When battery voltage reaches to the voltage set point of Over Voltage
Disconnect Voltage, the controller will stop charging the battery to protect the
battery overcharge to break down.
 Battery Over discharge
When battery voltage reaches to the voltage set point of Low Voltage
Disconnect Voltage, the controller will stop discharging the battery to protect
the battery over discharged to break down.
 Battery Overheating
The controller detects the battery temperature through the external
temperature sensor. If the battery temperature exceeds 65º C, the controller
will automatically start the overheating protection to stop working and recover
below 50 º C.
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