SCC MPPT 3KW User manual

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Solar Charge Controller 3KW
User Manual

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CONTENTS
1 ABOUT THIS MANUAL ...........................................................................................3
1.1 Purpose ......................................................................................................3
1.2 Scope .........................................................................................................3
1.3 SAFETY INSTRUCTIONS ...............................................................................3
2 INTRODUCTION....................................................................................................4
2.1 Features......................................................................................................4
2.2 Product Overview.........................................................................................5
3. INSTALLATION.....................................................................................................6
3.1 Unpacking and Inspection.............................................................................6
3.2 Preparation .................................................................................................6
3.3 Mounting the Unit ........................................................................................6
3.4 Power Connection ........................................................................................7
3.5 Grounding and Ground Fault Interruption .......................................................9
3.6 Remote Temperature Sensor .........................................................................9
3.7 Battery Voltage Sense ................................................................................10
3.8 Communication Connections .......................................................................11
4. OPERATION.......................................................................................................13
4.1 Power-Up ..................................................................................................13
4.2 Operation and Display Panel........................................................................13
4.2 LCD Display Icons ......................................................................................14
4.3 LCD Setting ...............................................................................................16
4.4 Reference Code .........................................................................................16
5. SPECIFICATIONS ...............................................................................................17
6. TROUBLE SHOOTING .........................................................................................17

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1 ABOUT THIS MANUAL
1.1 Purpose
This manual describes the assembly, installation, operation and troubleshooting of
this unit. Please read this manual carefully before installations and operations.
Keep this manual for future reference.
1.2 Scope
This manual provides safety and installation guidelines as well as information on
tools and wiring.
1.3 SAFETY INSTRUCTIONS
WARNING: This chapter contains important safety and operating
instructions. Read and keep this manual for future reference.
1. Before using the unit, read all instructions and cautionary markings on the unit,
the batteries and all appropriate sections of this manual.
2. Do not disassemble the unit. Take it to a qualified service center when service
or repair is required. Incorrect re-assembly may result in a risk of electric shock
or fire.
3. To reduce risk of electric shock, disconnect all wirings before attempting any
maintenance or cleaning. Turning off the unit will not reduce this risk.
4. CAUTION –Only qualified personnel can install this device with battery.
5. NEVER charge a frozen battery.
6. For optimum operation of this charger, please follow required spec to select
appropriate cable size. It’s very important to correctly operate this charger.
7. Be very cautious when working with metal tools on or around batteries. A
potential risk exists to drop a tool to spark or short circuit batteries or other
electrical parts and could cause an explosion.
8. Please strictly follow installation procedure when you want to disconnect PV or
battery terminals. Please refer to INSTALLATION section of this manual for the
details.
9. GROUNDING INSTRUCTIONS -This charger should be connected to a
permanent grounded wiring system. Be sure to comply with local requirements
and regulation to install this charger.
10. NEVER cause short circuited on battery output.
11. Warning!! Only qualified service persons are able to service this device. If
errors still persist after following troubleshooting table, please send this
charger back to local dealer or service center for maintenance.

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2 INTRODUCTION
Thank you for selecting this solar charge controller. This solar charge controller is an
advanced solar charger with maximum power point tracking. Applying intelligent MPPT
algorithm, it allows solar charge controller to extract maximum power from solar
arrays by finding the maximum power point of the array.
The MPPT battery charging process has been optimized for long battery life and
improved system performance. Self-diagnostics and electronic error protections
prevent damage when installation errors or system faults occur. This charger also
features multifunctional LCD with communication ports for remote battery
temperature and voltage measurement.
2.1 Features
•Intelligent Maximum Power Point Tracking technology increases efficiency 25%~30%
•Compatible for PV systems in 12V, 24V or 48V
•Three-stage charging optimizes battery performance
•Maximum charging current up to 60A
•Maximum efficiency up to 98%
•Battery temperature sensor (BTS) automatically provides temperature compensation
•Automatic battery voltage detection
•Support wide range of lead-acid batteries including wet, AGM and gel batteries
•Integrated intelligent slot compatible with SNMP/MODBUS communication

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2.2 Product Overview
1. LCD display
2. Power On/Charging indicator
3. Fault and warning indicator
4. Wiring fault indicator
5. Operation button
6. PV connectors
7. Battery connectors
8. Battery voltage sense terminal
9. Remote temperature sensor terminal
10. Wiring box cover
11. Communication port
12. Intelligent slot
13. Grounding terminal

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3. INSTALLATION
3.1 Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is
damaged. You should have received the following items inside of package:
Solar charge controller x 1
User manual x 1
Communication cable x 1
3.2 Preparation
Before connecting all wirings, please take off wiring box cover by removing screws as
shown below.
3.3 Mounting the Unit
Consider the following points before selecting where to install:
This solar charge controller is designed in IP31 for indoor applications only.
Do not mount the unit on flammable construction materials.
Mount on a solid surface
Install this charger at eye level in order to allow the LCD display to be read at all
times.
For proper air circulation to dissipate heat, allow a
clearance of approx. 20 cm to the side and approx. 50 cm
above and below the unit.
The ambient temperature should be between 0°C and 55°C
to ensure optimal operation.
The recommended installation position is to be adhered to
the wall vertically.

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Install the unit to the wall by screwing four screws.
Refer to right chart.
3.4 Power Connection
Wire size
The four large power terminals are sized for 14 - 2 AWG (2.5 - 35
mm2) wire. The terminals are rated for copper and aluminum
conductors. Use UL-listed Class B 300 Volt stranded wire only. Good
system design generally requires large conductor wires for solar module and battery
connections that limit voltage drop losses to 2% or less.
Minimum Wire Size
The table below provides the recommended minimum wire size allowed for the charger.
Wire types rated for 75°C and 90°C are listed.
Recommended wire size:
Typical Amperage
Wire Type
75°C Wire
90°C Wire
60A
Copper
4 AWG (25 mm2)
6 AWG (16 mm2)
Aluminum
2 AWG (35 mm2)
4 AWG (25 mm2)
Overcurrent Protection and Disconnects
CAUTION: Circuit breakers or fuses must be installed in both battery and solar
circuits.
The battery circuit breaker or fuse must be rated to 125% of the maximum current or
more. The recommended breaker/fuse rating for use with the charger is listed in the
below table.
Recommended breaker rating:
Minimum battery circuit breaker/fuse rating
1.25 x 60 Amps = 75.0 Amps
A disconnect is required for the battery and solar circuits to provide a means for
removing power from the charger. Double pole switches or breakers are convenient for
disconnecting both solar and battery conductors simultaneously.

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Connect the Power Wires
WARNING: Shock Hazard
The solar modules can produce open-circuit voltages in excess of 100 Vdc when in
sunlight. Verify if solar input breaker or disconnect has been opened (disconnected)
before connecting system wires.
Connect terminals by following below steps (Refer to diagram above):
1. Make sure that the system input and output disconnect switches are both turned
off before connecting power wires to the charger. There are no disconnecting
switches inside the charger.
2. Make 4 power wires first. Remove insulation sleeve 10.5mm and the conductor
should be plated Tin. Refer to the chart below.
3. Pull all wires into the wiring box. The Remote Temperature Sensor and Battery
Sense wires can be inside the conduit with the power conductors. It is easier to pull
RTS and Sense wires before the power cables.
WARNING: Risk of Damage
Be sure that the battery connection is made with correct polarity. Turn on the battery
breaker/disconnect and measure the voltage on the open battery wires BEFORE
connecting to the controller. Disconnect the battery breaker/disconnect before wiring

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to the controller.
4. Connect positive terminal (+) of battery to the battery positive terminal (+) on the
controller.
5. Connect negative terminal (-) of battery to one of the Common Negative terminals (-)
on the controller.
WARNING: Risk of Damage
Be sure that solar connection is made with correct polarity. Turn on the solar
breaker/disconnect and measure the voltage on the open wires BEFORE connecting to the
controller. Disconnect solar breaker/disconnect before wiring to the controller.
6. Connect positive wire (+) of solar module to the solar positive terminal (+) on the
controller.
7. Connect negative wire (-) of solar module to one of the Common Negative terminals
(-) on the controller.
8. Screw four (4) power terminals tightly with 50 in-lbs torque. (5.65 Nm)
3.5 Grounding and Ground Fault Interruption
Use a copper wire to connect the grounding terminal in the wiring box to earth ground.
The grounding terminal is identified by the ground symbol shown below that is
stamped into the wiring box just below the terminal:
The minimum size of the copper grounding wire is 8 AWG (10 mm2).
WARNING: Risk of Fire
DO NOT bond system electrical negative to earth ground at the controller.
3.6 Remote Temperature Sensor
The included Remote Temperature Sensor (RTS) is recommended for effective
temperature compensated charging. Connect the RTS to the 2-pole terminal (see
figure as below). The RTS is supplied with 33 ft (10 m) of 22 AWG (0.34 mm2) cable.
There is no polarity, so either wire (+ or -) can be connected to either screw terminal.

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The RTS cable may be pulled through conduit along with the power wires. Tighten the
connector screws with 5 in-lb (0.56 Nm) torque.
NOTE: The RTS is optional package. Please check local dealer for the details.
CAUTION: The controller will not activate temperature compensate charging function
if the RTS is not used.
CAUTION: Equipment Damage
Never place the temperature sensor inside a battery cell. Both the RTS and the battery
will be damaged.
NOTE: The RTS cable may be shortened if the full length is not needed.
3.7 Battery Voltage Sense
The voltage at the battery connection on the controller may differ slightly from the
voltage directly at the battery bank terminals due to connection and cable resistance.
The Battery Voltage Sense connection enables the controller to measure the battery
terminal voltage precisely with small gauge wires that carry very little current, and thus
have no voltage drop. Both battery voltage sense wires are connected to the 2-pole
terminal inside of wiring box (see figure as below).
Be careful to connect the battery positive (+) terminal to the voltage sense positive (+)
terminal and battery negative (-) terminal to the voltage sense negative terminal (-).
No damage will occur if the polarity is reversed, but the controller cannot read a
reversed sense voltage.