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5. PROTECTIONS, TROUBLESHOOTING AND MAINTENANCE
5.1 PROTECTION
PV Over
Current/power
When the charging current or power of the PV array exceeds the controller’s rated current or
power, it will be charge at the rated current or 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.
PV Reverse
Polarity
When the polarity of the PV array is reversed, the controller may not be damaged and can
continue to operate normally after the polarity is corrected.
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.
Prevents the battery from discharging to the PV module at night.
Battery Reverse
Polarity
Fully protected against battery reverse polarity; no damage will occur to the battery. Correct the
miswire to resume normal operation.
NOTE: Limited to the characteristic of lithium battery, when the PV connection is correct
and battery connection reversed, the controller will be damaged.
When the battery voltage reaches the over voltage disconnect voltage, it will automatically stop
battery charging to prevent battery damage caused by over-charging.
Battery Over
Discharge
When the battery voltage reaches the low voltage disconnect voltage, it will automatically stop
battery discharging to prevent battery damage caused by over-
discharging. (Any controller
connected loads will be disconnected. Loads directly connected to the battery will not be affected
and may continue to discharge the battery.)
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