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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• Confirm that power connections are tightened to avoid excessive heat caused from
loose connection.
• Use insulated tools and avoid placing metal objects near the batteries.
• Explosive gases may be present during charging. Be certain there is sufficient
ventilation to release the gases.
• Avoid direct sunlight and do not install in locations where water can enter the
controller.
• Loose power connections and/or corroded wires may result in resistive connections
that melt wire insulation, burn surrounding materials, or even cause fire. Ensure tight
connections and use cable clamps to secure cables and prevent them from swaying in
mobile applications.
• Only charge the batteries that comply with the parameters of controller.
• Battery connection may be wired to one battery or a bank of batteries. The following
instructions refer to a singular battery, but it is implied that the battery connection can
be made to either one battery or a group of batteries in a battery bank.
• Use the following cable & fuses for installation:
SC320: 4.5mm
2
cable, 30A Fuse
SC330: 4.5mm2 cable, 50A Fuse
WIRING DIAGRAM
1. Connect components to the charge controller in the sequence as shown in the picture
below “+”Red and “-“Black. Always power the battery first.
2. After power from the battery, check the battery indicator on the controller, it will be
green. If it’s not green, please refer to the ‘Protection’ section of the manual.
3. The battery fuse should be installed as close to battery as possible. The suggested
distance is within 150mm.
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OPERATION
LED Indicators
Battery status
L.E.D indicator
Charging status
L.E.D indicator
L.E.D indicator
Switch button
Indicator Status Description
Green On Solid Normal
Green Slowly Flashing In charging
Green OFF No charge
Green On Solid Normal
Green Slowly Flashing Full
Green Fast Flashing Over voltage
Orange On Solid Under voltage
Red On Solid Over discharged
temperature
Red Flashing
Red On Solid Normal
Red Slowly Flashing Overload
Red Fast Flashing Short circuit
Charging, load and battery indicator System voltage
(red) flashing simultaneously error
Charging, load and battery indicator Controller
(orange) flashing simultaneously overheating
Battery over
Load status
Switch Button Function
1. Manual Control ON/OFF of the load.
2. Resume to normal work after the fault is cleared up.
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FAULT CODES
Faults Possible reasons Troubleshooting
Charging LED Solar array Check that solar and battery wire connections are
indicator off during disconnection correct and tight.
daytime when
sunshine falls on
solar modules
Green Battery LED Battery voltage higher Check the battery voltage. If voltage levels are high,
indicator fast than over voltage disconnect the solar module immediately and
flashing disconnect voltage change to a new controller.
(OVD)
Battery LED Battery under voltage Load output is normal. Charging LED indicator will
indicators orange return to green automatically when fully charged.
Battery LED indicators Battery over The controller cut off the output automatically.
RED color and loads discharged LED indicator will return to green automatically
not working when not working.
Load status Over load Remove or cut out the additional load and press
indicator red and the button, the controller will resume after
slow flashing 3 seconds.
Load status indicator Short circuit Clear short circuit and press the button, the controller
red and fast flashing will resume to work after 3 seconds.
All LED indicators Temperature of When heat sink of the controller exceeds 85°C, the
flashing (battery controller too high controller will automatically cut input and output
orange indicator circuit. When the temperature reaches below 75°C,
flashing) the controller will resume operation. Reduce the
environment temperature, the power of solar
module or the power of the load.
All LED indicators System voltage error Check whether the battery voltage matches the
flashing (battery red controller working voltage. Please change to a suitable
indicator flashing) battery or reset the working voltage. If there is
nothing abnormal, please press load button to
clear the malfunction.
SOC value incorrect Wrong battery type Correct the right battery type;
selected using the Using the configuration of the charging voltage
reconfigured profile compensation if choosing the user defined battery
of the user defined type and ignore the SOC.
battery type.
SPECIFICATIONS
Electrical Parameters
Nominal System Voltage 12/24VDC
Max. PV input voltage 50V
Max. Battery Terminal Voltage 34V
Rated Battery Current SC320: 20A, SC330: 30A
Charge Circuit Voltage Drop ≤0.28V
Discharge Circuit Voltage Drop ≤0.20V
Self-consumption ≤8.4mA/12V; ≤7. 8mA/24V
Temperature compensation coefficient -3mV/°C /2V (Default)
Grounding Positive grounding
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Battery Voltage Parameters (parameters is in 12V system at 25°C, please use
X 2 in 24V system
Control Parameters
Battery charging setting Gel Sealed Flooded User
Over Voltage Disconnect Voltage 16.0V 16.0V 16.0V 9–17V
Charging Limit Voltage 15.0V 15.0V 15.0V 9–17V
Over Voltage Reconnect Voltage 15.0V 15.0V 15.0V 9–17V
Equalize Charging Voltage – 14.6V 14.8V 9–17V
Boost Charging Voltage 14.2V 14.4V 14.6V 9–17V
Float Charging Voltage 13.8V 13.8V 13.8V 9–17V
Boost Reconnect Charging Voltage 13.2V 13.2V 13.2V 9–17V
Low Voltage Reconnect Voltage 12.6V 12.6V 12.6V 9–17V
Under Voltage Warning Reconnect
Voltage
12.2V 12.2V 12.2V 9–17V
Under Voltage Warning Voltage 12.0V 12.0V 12.0V 9–17V
Low Voltage Disconnect Voltage 11.1V 11.1V 11.1V 9–17V
Discharging Limit Voltage 10.6V 10.6V 10.6V 9–17V
Equalize Duration – 2 hrs. 2 hrs. 0–3 hrs.
Boost Duration 2 hrs. 2 hrs. 2 hrs. 0–3 hrs.
Note:
1. The default battery type is Sealed (AGM). For Gel, Sealed, Flooded battery type, the voltage point is fixed,
& can only be modified via the remote control SC300D if purchased seperatly.
2. User type is the user defined battery type. The default value is the same as sealed type. When modifying it,
please follow the below logistic relation:
a) Over Voltage Disconnect Voltage Charging Limit Voltage≥ Equalize Charging Voltage ≥Boost Charging
Voltage≥ Float Charging Voltage Boost Reconnect Charging Voltage;
b) Over Voltage Disconnect Voltage Over Voltage Reconnect Voltage ;
c) Low Voltage Reconnect Voltage Low Voltage Disconnect Voltage≥Discharging Limit Voltage;
d) Under Voltage Warning Reconnect Voltage Under Voltage Warning Voltage≥Discharging Limit Voltage;
e) Boost Reconnect Charging voltage Low Voltage Disconnect Voltage.
*Please carefully to select battery type. It will damage battery if the setting is incorrect.
Environmental Specifications
Working temperature -35°C to +50°C
Storage temperature -35°C to +80°C
Humidity ≤95% NC
Enclosure IP30
SC320 Mechanical Specifications
Overall dimension 159.6 (6.28) x 81.4 (3.2) x 47.8 (1.88) mm/inches
Mounting dimension 147 (5.79) x 50 (1.97) mm/inches
Mounting hole size 4.3
Terminal 10mm
2
Net weight 0.3kg
SC330 Mechanical Specifications
Overall dimension 200.6 (7.9) x 101.3 (3.99) x 57 (2.24) mm/inches
Mounting dimension 190 (7.48) x 70 (2.76) mm/inches
Mounting hole size Φ4.5
Terminal 10mm
Net weight 0.5kg
2
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WARRANTY STATEMENT
Applicable only to product sold in Australia
Brown & Watson International Pty Ltd of 1500 Ferntree Gully Road, Knoxfield, Vic.,
telephone (03) 9730 6000, fax (03) 9730 6050, warrants that all products described in
its current catalogue (save and except for all bulbs and lenses whether made of glass or
some other substance) will under normal use and service be free of failures in material
and workmanship for a period of one (1) year (unless this period has been extended as
indicated elsewhere) from the date of the original purchase by the consumer as marked
on the invoice. This warranty does not cover ordinary wear and tear, abuse, alteration
of products or damage caused by the consumer.
To make a warranty claim the consumer must deliver the product at their cost to the
original place of purchase or to any other place which may be nominated by either BWI
or the retailer from where the product was bought in order that a warranty assessment
may be performed. The consumer must also deliver the original invoice evidencing the
date and place of purchase together with an explanation in writing as to the nature of
the claim.
In the event that the claim is determined to be for a minor failure of the product then
BWI reserves the right to repair or replace it at its discretion. In the event that a major
failure is determined the consumer will be entitled to a replacement or a refund as well
as compensation for any other reasonably foreseeable loss or damage.
This warranty is in addition to any other rights or remedies that the consumer may have
under State or Federal legislation.
IMPORTANT NOTE
Our goods come with guarantees that cannot be excluded under the Australian
Consumer Law. You are entitled to a replacement or refund for a major failure and
compensation for any other reasonably foreseeable loss or damage. You are also
entitled to have the goods repaired or replaced if the goods fail to be of acceptable
quality and the failure does not amount to a major failure.
Distributed by
AUSTRALIA
Brown & Watson International Pty Ltd
Knoxfield, Victoria 3180
Telephone (03) 9730 6000
Facsimile (03) 9730 6050
National Toll Free 1800 113 443
NEW ZEALAND
Narva New Zealand Ltd
22–24 Olive Road
PO Box 12556 Penrose
Auckland, New Zealand
Telephone (09) 525 4575
Facsimile (09) 579 1192
IS283
Issue 1 8.08.14
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