User Manual

Battery Working Voltage Error

If battery voltage does not match controller working voltage, controller will stop

working. After correcting the voltage, the failure can be eliminated through pushing

the load button.

Damaged Temperature Sensor

If the temperature sensor is short-circuited or damaged, the controller will be charging

or discharging at the default temperature 25°C to prevent the battery damaged from

overcharging or over discharge.

Overheating Protection

If the temperature of the controller heat sink exceeds 85°C, the controller will

automatically start the overheating protection and stop the charging and discharging.

When the temperature is below 75°C, the controller will resume to work.

High Voltage Transients

Solar is protected against smaller high voltage surge. In lightning prone areas,

additional external suppression is recommended.

Note: The controller has daily automatic fault recovery function which will reduce

the manual operation and can intelligently eliminate the fault caused by non-actual

hardware failure.

LOW VOLTAGE DISCONNECT (LVD)

LVD will disconnect the DC load before the battery voltage falls too low, preventing

damage due to over-discharge. Once the battery is recharged, the DC load will be

automatically reconnected.

LOAD CONTROL

The SC320 & SC330 allow you to switch the DC load on/off from the controller without

having to physically disconnect the load or appliance. When switched to ‘off’, the DC

load is isolated from the battery ensuring maximum power conservation.

ELECTRICAL PROTECTION

• Short circuit & over current protection

• Reverse polarity protection

• Conformal coated for protection against dust and moisture

INSTALLATION

General Installation Notes

• Be very careful when working with batteries. Wear eye protection. Have fresh water

available to wash and clean any contact with battery acid.

• Never short circuit the battery positive and negative terminals, and wires which may

cause explosion or fire.

• Install external fuses/breakers as required.

• Disconnect the solar module and fuse/breakers near the battery before installing or

adjusting the controller.