Projecta SC330, SC320 User Manual

12/24 VOLT AUTOMATIC

SOLAR CHARGE CONTROLLER

P/No.s SC320 & SC330

WARNING

• Please read these instructions completely prior to installation.

• Lead acid batteries can be dangerous. Ensure no sparks or flames are present when
working near batteries. Eye protection should be used. If mounting on a vehicle follow
all manufacturers’ instructions.

• Given sufficient light solar panels always generate energy even when they are
disconnected. Accidental ‘shorting’ of the terminals or wiring can result in sparks
causing personal injury or a fire hazard. It is recommended to cover the front face
of the panel(s) with a soft cloth to block incoming light during installation.

• For use with 12V or 24V (nominal) solar panels.

• For indoor, out of weather use only.

• Do not exceed the total limit of the solar controller:
P/No. SC320: 20A
P/No. SC330: 30A

FEATURES

3 STAGE CHARGING

Ideal for deep cycle batteries, SC320 & SC330 deliver 3 stage charging, maximising

battery life and performance. The in-built temperature sensor adjusts the output
guaranteeing a thorough charge in all conditions.

• Maintains your battery ready for use

• Safe to leave permanently connected

• Prevents solar over-charge/discharge

PROTECTION

Solar Array Short Circuit

If solar array short circuit occurs, clear it to resume normal charge automatically.

Load Overload

If the load current exceeds the rated current of controller ≥1.05 times rated discharge

current, the controller will disconnect the load. The cause of the overload must be
corrected, it can then be cleared by pressing the switch button.

Load Short Circuit

Full protection against load wiring short-circuit ≥2 times rated discharge current.

After one automatic load reconnect attempt, the fault must be cleared by restarting
the controller or pressing the switch button.

Solar Reverse Polarity

Full protection against solar reverse polarity, no damage to the controller will result.

Correct the miswire to resume normal operation.

Battery Reverse Polarity

Full protection against battery reverse polarity, no damage to the controller will result.

Correct the miswire to resume normal operation.

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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.

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