Protections, Troubleshooting & Maintenance; Protections - Epever Tracer AN Series User Manual

4 Protections, Troubleshooting & Maintenance

4.1 Protections

WARNING: Do not reverse the polarity of the batteries. Reverse polarity will damage the charge controller permanently. Damage caused by
reverse polarity, is not covered by warranty.
When the charging current or power of the PV array exceeds the controller's rated current or power, it will be charge at the
PV Over rated current or power.
Current/power NOTE: When the PV modules are in series, ensure that the open-circuit voltage of the PV array does not exceed the
"maximum PV open-circuit voltage" rating. Otherwise the controller may be damaged.
PV Short Circuit When not in PV charging state, the controller will not be damaged in case of a short-circuiting in the PV array.
When the polarity of the PV array is reversed, the controller may not be damaged and can continue to operate normally after
PV Reverse the polarity is corrected.
Polarity NOTE: If the PV array is reverse connected to the controller,1.5 times rated controller power(watts)from the PV array, will
damage the controller.
Night Reverse
Prevents the battery from discharging through the PV module at night.
Charging
Battery Over When the battery voltage reaches the over voltage disconnect voltage, it will automatically stop battery charging to prevent
Voltage battery damage caused by over-charging.
When the battery voltage reaches the low voltage disconnect voltage, it will automatically stop battery discharging to prevent
Battery Over
battery damage caused by over-discharging. (Any controller connected loads will be disconnected. Loads directly connected to
Discharge
the battery will not be affected and may continue to discharge the battery.)
Battery The controller can detect the battery temperature through an external temperature sensor. The controller stops working
Overheating when its temperature exceeds 65 °C and restart to work when its temperature is below 55 °C.
When the temperature detected by the optional temperature sensor is lower than the Low Temperature Protection
Lithium Battery
Threshold(LTPT), the controller will stop charging and discharging automatically. When the detected temperature is higher
Low
than the LTPT, the controller will be working automatically (The LTPT is 0 °C by default and can be set within the range of 10 ~
Temperature
-40 °C，refer to the setting the low temperature charge limit value of lithium battery ).
Controller
The controller is able to detect the temperature its internal. The controller stops working when its temperature exceeds 85 °C
and restart to work when its temperature is below 75 °C.
Overheating
★
The internal circuitry of the controller is designed with Transient Voltage Suppressors (TVS) which can only protect against
TVS High Voltage
high-voltage surge pulses with less energy. If the controller is to be used in an area with frequent lightning strikes, it is
Transients
recommended to install an external surge arrester.
★When the internal temperature is 81℃, the reducing power charging mode which reduce the charging power of 5%,10%,20%,40% every increase 1 ℃is turned on. If the
internal temperature is greater than 85℃, the controller will stop charging. But while the temperature decline to be below 75 ºC, the controller will resume.
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