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MPPT Solar Charge Controller
Installation and Operation Manual
Maximum Power Point Tracking Technology
SMK-SCH-20A SMK-SCH-30A
12V/24V
SMK-SCH-30A SMK-SCH-40A
12V/24V/48V Heatsink cooling
SMK-SCH-50A SMK-SCH-60A
12V/24V/48V Heatsink cooling
SMK-SCH-70A SMK-SCH-80A
12V/24V/48V Heatsink cooling
SMK-SCF-30A SMK-SCF-40A
12V/24V/48V
Fan
cooling
SMK-SCF-50A SMK-SCF-60A
12V/24V/48V
Fan
cooling
Heatsink cooling
Content
1. IMPORTANT SAFETY INSTRUCTIONS …………………………………..….……..…3
2. GETTING STARTED …………………………………………………………....……..5
3. INSTALLATION ……………………………………………………………...………..8
4. OPERATION ………………………………………………….…..………….………13
5. NETWORKING AND COMMUNICATION ………………………….…………..…….17
6. TROUBLE SHOOTING ……………………………….……………….…..…….……19
7. WARRANTY , CLAIM PROCEDURE AND DATASHEET …………………….…..……20
2
1. Important safety instructions
Save these instructions
This manual contains important safety, installation and operating instructions for the
SMK MPPT solar controller.
The following symbols are used throughout this manual to indicate potentially
dangerous conditions or mark important safety instructions.
WARNING:
Indicates a potentially dangerous condition. Use extreme caution when performing
this task.
CAUTION:
Indicates a critical procedure for safe and proper operation of the controller.
NOTE:
Indicates a procedure or function that is important for the safe and proper operation
of the controller.
Safety Information

Read all of the instructions and cautions in the manual before beginning
installation.

There are no user serviceable parts inside the SMK MPPT charger. Do not
disassemble or attempt to repair the controller.

Disconnect all sources of power to the controller before installing or adjusting the
SMK controller.

Mount the controller indoors. Prevent exposure to the elements and do not allow
water to enter the controller.

Install the controller in a location that prevents casual contact. The controller can
become very hot during operation.

Use insulated tools when working with batteries.

Avoid wearing jewelry during installation.

The battery bank must be comprised of batteries of same type, make, and age.

Do not smoke in the vicinity of the battery bank.
3

Power connections must remain tight to avoid excessive heating from a loose
connection.

Use properly sized conductors and circuit interrupters.
WARNING: A battery can present a risk of electrical shock or burn from
large amounts of short-circuit current, fire, or explosion from vented gases. Observe
proper precautions.
CAUTION: When replacing batteries, use properly specified sizes ,type,
and rating based on application and system design.
CAUTION: Proper disposal of batteries is required. Refer to local
regulations or codes for requirements.
About this Manual
This manual provides detailed installation and usage instructions for
the SMK MPPT solar charge controller. Only qualified electricians and
technicians who are familiar with solar system design and wiring
practices should install the MPPT controller. The usage information in
this manual is intended for the system owner/operator.
4
2. Getting Started
2.1 Overview
Thank you for selecting the SMK MPPT solar charge controller. The SMK MPPT
series controller is an advanced maximum power point tracking solar battery charger.
The controller features a smart tracking algorithm that finds and maintains operation
at the solar array peak power point, maximizing energy harvest.
The SMK MPPT series controller charging process has been optimized for long
battery life and improved system performance. Self-diagnostics and electronic error
protections prevent damage when installation mistakes or system faults occur. The
controller also features four(4) adjustable setting switches, RS485/RS232/Ethernet
communication port (GPRS/DAU Optional)
and terminal for remote battery
temperature measurement.
Please take the time to read this operator’s manual and become familiar with the
controller. This will help you make full use of the many advantage the MPPT
Controller that can provide for your PV system.
2.2 Versions and Rating
There are 12 models of SMK MPPT series controller.
SMK-SCH-20A 12V/24V

Maximum 20 amps continuous battery current

12/24Volt DC systems

Maximum 100 Volt DC solar input voltage

Com port
SMK-SCH-30A 12V/24V

Maximum 30 amps continuous battery current

12/24 Volt DC systems

Maximum 100 Volt DC solar input voltage

Com Port
SMK-SCH-30A 12V/24V/48V

Maximum 30 amps continuous battery current

12,24, and 48 Volt DC systems

Maximum 100 Volt DC solar input voltage

RS-485 communication port
SMK-SCH- 40A 12V/24V/48V

Maximum 40 amps continuous battery current

12,24, and 48 Volt DC systems
5

Maximum 100 Volt DC solar input voltage

RS-485 communication port
SMK-SCH- 50A 12V/24V/48V

Maximum 50 amps continuous battery current

12,24, and 48 Volt DC systems

Maximum 150 Volt DC solar input voltage

RS485/RS232/Ethernet communication, GPRS/DAU Optional
SMK-SCH-60A 12V/24V/48V

Maximum 60 amps continuous battery current

12,24, and 48 Volt DC systems

Maximum 150 Volt DC solar input voltage

Standard RS485/RS232/Ethernet communication, GPRS/DAU Optional
SMK-SCH-70A 12V/24V/48V

Maximum70 amps continuous battery current

12,24, and 48 Volt DC systems

Maximum 150 Volt DC solar input voltage

RS485/RS232/Ethernet communication, GPRS/DAU Optional
SMK-SCH-80A 12V/24V/48V

Maximum 80 amps continuous battery current

12,24, and 48 Volt DC systems

Maximum 150 Volt DC solar input voltage

RS485/RS232/Ethernet communication, GPRS/DAU Optional
SMK-SCF-30A 12V/24V/48V

Maximum 30 amps continuous battery current

12/24 Volt DC systems

Maximum 100 Volt DC solar input voltage

RS-485 communication port
SMK-SCF- 40A 12V/24V/48V

Maximum 40 amps continuous battery current

12,24, and 48 Volt DC systems

Maximum 100 Volt DC solar input voltage
6

RS-485 communication port
SMK-SCF-50A 12V/24V/48V

Maximum 50 amps continuous battery current

12,24, and 48 Volt DC systems

Maximum 150 Volt DC solar input voltage

RS232/Ethernet communication optional

SMK-SCF-60A 12V/24V/48V

Maximum 60 amps continuous battery current

12,24, and 48 Volt DC systems

Maximum 150 Volt DC solar input voltage

RS232/Ethernet communication optional
2.3 Features
The features of the MPPT controller are shown in figure below. An explanation of
each feature is provided
.
1. Heatsink
Aluminum heatsink to dissipate controller heat
2. Mounting hole
Keyhole slot for mounting
3. Setting Switches
7
Four setting switches to configure operation of the MPPT controller
4. Solar Positive Terminal
Power connection for Solar(+)
Solar Negative Terminal
Power connection for solar(-)
5. Battery Positive Terminal
Power connection for battery(+)
Battery Negative Terminal
Power connection for battery(-)
6. DC Load output
7. LCD screen
Indicate the operating status
8. LED indicators
LED indicators show charging status and controller faults
9. Wiring Box cover
Sheet metal wiring box cover protect power connections
10. RS-485/232Port
Terminal for RS-485/232 communication
11. Ethernet Port
Terminal for Ethernet communication
12. Battery temperature Sensor
Terminal for battery temperature detect and provide compensation
8
3. Installation
3.1 General Information
The mounting location is important to the performance and operating life of the
controller. The environment must be dry and protected from water ingress. If required,
the controller may be installed in a ventilated enclosure with sufficient air flow. Never
install the controller in a sealed enclosure. The controller may be mounted in an
enclosure with sealed batteries, but never with vented/flooded batteries. Battery
fumes from vented batteries will corrode and destroy the controller circuits.
Multiple controllers can be installed in parallel on the same battery bank to achieve
higher charging current. Additional parallel controllers can also be added in the future.
Each controller must have its own solar array.
CAUTION: Equipment Damage or Risk of Explosion
Never install the controller in an enclosure with vented/flooded batteries. Battery
fumes are flammable and will corrode and destroy the controller circuits.
CAUTION: Equipment Damage
When installing the controller in an enclosure,
ensure sufficient ventilation.
Installation in a sealed enclosure will lead to over-heating and decreased product
lifetime.
The installation is straight-forward, but it is important each step is done correctly and
safety. A mistake can lead to dangerous voltage and current levels. Be sure to
carefully follow each instruction. Read all instructions first before beginning
installation.
Recommended Tools:

Wire strippers

Wire cutters

Phillips screwdriver

Slotted screwdrivers

Pliers

Drill

Drill bit

Level

Hack saw(cutting conduit)
9
3.2 Controller Installation
Step 1-Remove the wiring box cover
CAUTION: Shock Hazard
Disconnect all power sources to the controller before removing the wiring box cover.
Never remove the cover when voltage exists on any of the MPPT power connections.
Use a #4 Phillips screw driver to remove the four screws that secure the wiring box
cover as show in figure below.
Battery charging setting
It is important to select the battery type that match the system battery to ensure
proper charging and long battery life. Refer to the specifications provided by the
battery manufacturer and choose a setting that best fits the recommended charging
profile.
Battery type
Bulk charge stage
Float charge stage
Equalize charge stage
Gel
AGM
Sealed
Flooded
User define
14.2
14.3
14.4
14.6
10-15V
13.7
13.7
13.7
13.5
10-15
14.4
14.5
14.6
14.8
10-15V
Battery type-The most common battery type associated with the specified charging
settings.
Bulk stage-This stage limits input current, as the battery become more charged ,the
charging current continues to taper down until the battery is fully charged.
Float stage- When the battery is fully charged, the charging voltage will be reduced to
the float voltage setting.
Equalize stage-During an equalization cycle, the charging voltage will be held
constant at the specified voltage setting.
10
Network connections
Network connections allow the MPPT controller to communicate with computers. A
network can be as simple as one controller and one PC, or as complex as dozens of
controllers monitored via the Internet.
Power connections
Wire size
The six large power terminals are sized for 6AWG wire. The terminals are rated for
copper and aluminum conductors. Good system design generally requires large
conductor wires for the solar and battery connection that limit voltage drop losses to
2% or less.
Minimum wire size
Minimum wire sizes for ambient temperatures to 45
below.
Model
Copper Wire Type
SMK-SCH-20A
Copper
SMK-SCH-30A
Copper
SMK-SCH-40A
Copper
SMK-SCH-50A
Copper
SMK-SCH-60A
Copper
SMK-SCH-70A
Copper
SMK-SCH-80A
Copper
SMK-SCF-30A
Copper
SMK-SCF-40A
Copper
SMK-SCF-50A
Copper
SMK-SCF-60A
Copper
Connect the power wires
°C are provided in table 3-2
Recommended Size
8AWG
8AWG
6AWG
5AWG
5AWG
4AWG
4AWG
8AWG
6AWG
5AWG
5AWG
Minimum Size
10AWG
10AWG
7AWG
6AWG
6AWG
5AWG
5AWG
10AWG
7AWG
6AWG
6AWG
WARNING: Shock Hazard
The solar PV array can produce open-circuit voltages in excess of 100VDC or
150VDC (Depend on different Model of the controller) when in sunlight. Verify that
the solar input breaker or disconnect has been opened
(disconnected) before
installing the system wires.
Model:20A 30A
40A
Model: 50A 60A 70A 80A
11
Connect the six power conductors shown in figure above the following steps:
1. Confirm that the system input and output disconnect switches are both turned off
before connecting the power wires to the controller. There are no disconnect
switches inside the controller.
2. Put the wires into the wiring box.
WARNING: Risk of Damage
Be very certain 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
connect to the controller. Disconnect the battery breaker/disconnect before wiring to
the controller.
3. Connect the battery+ (Positive) wire to the battery+ terminal on the controller,
Connect the battery - (Negative) wire to the battery- terminal on the controller
4. Connect the Solar+ (Positive) wire to the battery+ terminal on the controller,
Connect the Solar + (Negative) wire to the battery - terminal on the controller.
Power-Up
WARNING: Risk of Damage
Connecting the solar array to the battery terminal will
controller.
permanently damage the
WARNING: Risk of Damage
Connecting the solar array or battery connection with reverse polarity
will permanently damage the controller.

Confirm that the Solar and Battery polarities are correct.

Turn the battery disconnect switch on first. Observe that the LCD indicate a
successful start-up.(LCD display stand by)

Note that a battery bank must be connected to the controller to start and operate
the controller. The controller will not operate only from solar input.

Turn the solar disconnect on. If the solar array is in full sunlight. The controller
will begin charging.
12
Power-Down
WARNING: Risk of Damage
Only Disconnect the battery from the controller AFTER the solar input has been
disconnected. Damage to the controller may result if the battery is removed while the
controller is charging.
To prevent damage, Power-down must be done in the reverse order as power-up.
13
4. Operation
The SMK controller is fully automatic. After installation is completed, there are few
operator tasks to perform. However, the operator should be familiar
with the
operation and care of the controller as described in this section.
4.1The MPPT controller utilizes SMK Solar Maximum Power Point
Tracking (MPPT) technology to extract maximum power from the solar array. The
tracking algorithm is fully automatic and does not require user adjustment. SMK
technology tracks the array maximum power point as it varies with weather
conditions, ensuring that maximum power is harvested from the array throughout the
course of the day.
4.2 Current Boost
Under most conditions, SMK MPPT technology will “boost” the solar charge
current. For example, a system may have 36 Amps of solar current flowing into
the controller and 44 Amps of charge current flowing out to the battery. The
SMK controller does not create current! Rest assured that the power into the
controller is the same as the power out of the controller. Since power is the
product of voltage and current (Volts x Amps), the following is true*:
(1) Power Into the SMK MPPT 150V = Power Out of the SMK MPPT 150V
(2) Volts In x Amps In = Volts Out x Amps Out
* assuming 100% efficiency. Losses in wiring and conversion exist.
If the solar module’s maximum power voltage (V mp) is greater than the battery
voltage, it follows that the battery current must be proportionally greater than
the solar input current so that input and output power are balanced. The greater
the difference between the Vmp and battery voltage, the greater the current boost.
Current boost can be substantial in systems where the solar array is of a higher
nominal voltage than the battery as described in the next section.
4.3 Battery Charging Information
The MPPT controller has 4-stage battery charging algorithm for rapid, efficient,
and safe battery charging. Figure 4-2 show the sequence of the stages.
Figure4-2. MPPT controller Charging Algorithm
14
Bulk Charge Stage
In bulk charge stage, the battery is not at 100% stage of charge and battery voltage
has not yet charged to the absorption voltage set-point. The controller will deliver 100%
of available solar power to recharge the battery. The green LED will blink once 0.5
second during bulk charging.
Absorption Stage
When the battery has recharged to the absorption voltage set-point, constant-voltage
regulation is used to maintain battery voltage at the absorption set-point, This
prevents heating and excessive battery gassing. The battery is allowed to come to
full state of charge at the absorption voltage set-point. The Green LED will blink once
per two second during absorption charging.
Float Stage
After the battery is fully charged in the absorption stage, The MPPT controller
reduces the battery voltage to the Float voltage set-point, When the battery is fully
recharged, there can be no more chemical reactions and all the charging current is
turned into heat and gassing. The float stage provides a very low rate of maintenance
charging while reducing the heating and gassing of a fully charged battery. The
purpose of float is to protect the battery from long-term over-charge. The green LED
will keep green during float charging.
Equalize Stage
Equalize charging will start working in a period of 30 days. It will charge in a higher
voltage so as to active the battery activity , usually 30mins ,depending on different
battery type. Equalize charge will longer battery lifetime.
WARNING: Risk of Explosion
Equalizing vented batteries produces explosive gases. The battery bank must be
properly ventilated.
CAUTION: Equipment Damage
Equalization increases the battery voltage to levels that may damage sensitive DC
loads. Verify all system loads are rated for the temperature compensated Equalize
voltage before beginning an Equalization charge. Excessive overcharging and
gassing too vigorously can damage the battery plates and cause shedding of active
material from the plates. An equalization that is too high or for too long can be
damaging. Review the requirements for the particular battery being used in your
system.
15
Temperature Compensation
All charging setting are based on 25°C (77°F). If the battery temperature varies by
5°C, the charging setting will change by 0.15volts from a 12v battery. This is a
substantial change in the charging of the battery , and the use of the Battery sensor
is recommended to adjust charging to the actual battery temperature.
4.4 Protections, Faults&Alarms
The MPPT controller protections and automatic recovery are important features that
ensure the safe operation of the system. Additionally, the SMK controller features
real-time self diagnostics that report Fault and Alarm condition as they occur.
Faults are events or conditions that require the controller to cease operation. A Fault
usually occurs when a limit such as voltage, current, or temperature has been
surpassed. Fault conditions are indicated with unique LED sequences and are also
displayed on the LCD screen.
Protections
Solar overload
The controller will limit battery current to the maximum battery current rating. An
over-sized solar array will not operate at peak power. The solar array should be less
than the controller nominal maximum input power rating for optimal performance.
Solar short circuit
The controller will disconnect the solar input if a short circuit is detected in the solar
wiring. Charging automatically resumes when the short is cleared.
Very Low battery Voltage
If battery discharge below 9 Volts the controller will go into brownout and shut down.
When the battery voltage rises above the 10 Volts minimum operating voltage, the
controller will restart.
Alarms
High temperature current limit
The MPPT controller will limit the solar input current if the heatsink temperature
exceeds safe limit. Solar charge current will be tapered back(to 0 amps if needed) to
reduce the heatsink temperature. The controller is designed to operate at full rated
current at the maximum ambient temperature. This alarm indicates that there is
insufficient airflow and that the heatsink temperature is approaching unsafe limits. If
the controller frequently reports this alarm condition, corrective action must be taken
to provide better air flow or to relocate the controller to a cooler spot.
High Input voltage current limit
16
The MPPT controller will limit the solar input current as the
solar array Voc
approaches the maximum input voltage rating. The array Voc should never exceed
the maximum input voltage(100VDC or 150VDC).
Current limit
The array power exceeds the rating of the controller, this alarm indicates that the
controller is limiting battery current to the maximum current rating.
Uncalibrated
The controller was not factory calibrated. Return the controller to an authorized SMK
dealer for service.
Inspection and Maintenance
The following inspections are recommended two times per year for best long-term
performance.
System Inspection

Confirm the controller is securely mounted in a clean and
environment.

Confirm that the air flow around the controller is not blocked. Clean the
heatsink of any dirt or debris.

Inspect all exposed conductors for insulation damage due to sun
damage, rubbing on nearby objects, dry rot, insects, or rodents. Repair
or replace conductors as necessary.

Tighten all power connections per the manufacturers’ recommendations.

Verify the LED and LCD indications are consistent with the equipment
operation. Note any fault or error indications. Take corrective action if
necessary.

Inspect the battery bank. Look for cracked or bulging cases and
corroded terminals.

Inspect the system earth grounding for all components .Verify all
grounding conductors are appropriately secured to earth ground.
dry
Inside the MPPT controller Wiring Box
CUATION: Shock Hazard
Disconnect all power sources to the controller before removing the wiring box cover.
Never remove the cover when voltage exists on the controller power connections.

Check all wire terminals. Inspect connection for corrosion, damaged insulation,
signs of high temperature or burning/discoloration. Tighten the terminal screws
to the recommended torque.

Inspect for dirt, nesting insects, and corrosion. Clean as required.
17
5. Display and parameter setting, Monitoring
The MPPT control possess : Two different screen model as following:
30A 40A
50A 60A 70A 80A
18
Customer can revise and set the default parameter according to your system design.
Battery type,Bulk charge, Float charge voltage, Load off voltage, Load Off/On,
Date/Time , Communication ID are able to change through the screen button setting.
Communication
The MPPT controller provides RS485/232/Ethernet and optional GPRS/DAU
communication selection for your customized requirement. We offer different type of
monitor system for your solar system. No matter the residential system, commercial
system or the remote monitoring for your telecom station/oil station , we have
different solution for the monitoring.
Example 1: Home use system monitoring
Example 2: GPRS Monitoring
19
Example 3: Centralized monitoring
20
6. Troubleshooting
Battery Charging and Performance Issues
Problem:
No LCD or LED indications, controller does not appear to be power.
Solution:
With a multi-meter, check the voltage at the battery terminals on the controller.
Battery voltage must be 9 VDC or greater. If the voltage on the battery terminals of
the controller is between 9 and 60 VDC and no LED or LCD indicate, contact your
authorized SMK solar dealer for service. If no voltage is measured, check wiring
connections, fuses, and breaker.
Problem:
The controller is not charging the battery.
Solution:
If the LCD indication is normal, check the fuses, breakers and wiring connections in
the solar array wiring. With a multi-meter, check the array voltage directly at the
controller solar input terminals. Input voltage must be greater than the Minimum startup voltage before charging will begin.
Network and Communication Issues.
Problem:
Can not connect to the controller Via communication port.
6.1 communication port pin define
Make sure that your cable match the RS485 communication port. For 30A 40A
controllers ,the default communication is RS485. For 50A 60A 70A 80A controller,
the communication port is RS485/232/Ethernet.
21
7.Warranty , Claim Procedure and Datasheet
All of SMK MPPT controllers are warranted to be free from defects in material and
workmanship for a period of two years from the date of shipment to the original end
user. SMK will, at its option, repair or replace any such defective products.
WARRANTY EXCLUSIONS AND LIMITATIONS
This warranty does not apply under the following conditions:

Damage by accident, negligence, abuse or improper use.

PV or Load current exceeding the ratings of the product.

Unauthorized product modification or attempted repair.

Damage occurring during shipment.

Damage results from acts of nature such as lightning and weather extremes.
The warranty and remedies set forth above are exclusive and in lieu of all others,
express or implied. SMK solar specifically disclaims any and all implied warranties,
including, without limitation, warranties of merchantability and fitness for a particular
purpose. No SMK distributor, agent or employee is authorized to make any
modification or extension to this warranty.
SMK IS NOT RESPONSIBLE FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES OF ANY KIND, INCLUDING BUT NOT LIMITED TO LOST
PROFITS ,DOWN-TIME, GOODWILL OR DAMAGE TO EQUIPMENT OR
PROPERY.
WARRANTY CLAIM PROCEDURE
Before proceeding, please refer to product manual, including trouble shooting section.
1.Contacting your authorized SMK distributor or dealer from whom you purchase the
unit is the first step in the warranty process. Local dealers can often address
warranty issues quickly.
2. If supplier is unable to address the issue, please contact by Email
([email protected]) with:
(A) Purchase location-business or company name
(B) Full model and serial number (SN is 18-digits on unit bar label)
(C) Failure behavior, including LCD indications
(D) Array configuration, panel Pmax, Voc, Vmp, Isc, and battery voltage;
These specifications are needed to receive assistance.
3. After warranty replacement has been approved and new unit(s) received, please
return failed unit(s) using pre-paid shipping label, and follow any product specific
instructions if requested by SMK Warranty Dept.
22
4. If instructed controller after warranty replacement shipment has been
received, return of failed unit(s) is required before further warranty replacements
can be considered for the original or future cases.
NOTE: PLEASE DO NOT RETURN UNITS WITHOUT AN RMA CASE NUMBER.
DOING SO WILL INCREASE THE TIME REQUIERED TO RESOLVE YOUR CLAIM.
Technical Specification for MPPT series MPPT solar charge controller
SCH Series MPPT Charge Controller Datasheet Heatsink cooling version
Model
SMK-SCH-20A
Solar System Voltage
SMK-SCH-30A
SMK-SCH-30A
SMK-SCH-40A
SMK-SCH-50A
12V/24V
SMK-SCH-60A
SMK-SCH-70A
SMK-SCH-80A
12V/24V/48V
Electrical
PV operating voltage
Max. PV open circuit
voltage
Max. PV input
Max. charging current
Max. DC load current
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected] [email protected] [email protected]
100Vdc
12V
300W
12V 400W
24V
600W
24V 800W
20A
150Vdc
12V 400W
24V 800W
48V 1700W
30A
12V 600W
24V 1200W
48V 2300W
30A
30A
12V
24V
48V
40A
40A
Self Consumption
700W
1400W
2800W
12V
24V
48V
1000W
2000W
4000W
12V 1200W
24V 2300W
48V 4600W
50A
60A
70A
80A
60A
60A
60A
60A
2W
97.5%
Conversion Efficiency
12V 800W
24V 1700W
48V 3400W
3W
98%
98.5%
Overload, short circuit, high voltage ,high temperature protection
Protection
Battery charging
Battery Type
Charging Algorithm
Sealed ,AGM, Gel, Flooded, User Define
3-stage: Bulk, Absorption, Float
Bulk charge voltage
4-stage: Bulk, Absorption, Float, Equalize
Sealed:14.4V AGM Gel:14.2V Flooded:14.6V User define:10-15V
Float charge voltage
Equalize charge
voltage
Low voltage
reconnect voltage
Low voltage
disconnect voltage
Temperature
compensation
Sealed/Gel/AMG:13.7V Flooded:13.6V User define :10-15V
Sealed:14.6V AGM:14.8V Flooded:14.8V User define :10-15V
10.2V
9V
-5mV/℃ /2V with BTS(Optional)
Communication
COM for remote display
RS485 with On line monitor
system
Net weight
1.6KG
3.3KG
6.5KG
7.8kg
Gross weight
1.9KG
3.7KG
7.4KG
8.7KG
Dimensions
210*180*70
270*185*90
305*227*110
353*227*110
Packing box
270*220*95
345*255*160
Communication Port
RS485/232/Ethernet with On line monitor system, GPRS/DAU
Optional
Mechanical
Cooling
Enclosure
455*320*230
Heatsink cooling
IP54
Environment
Ambient Temperature
-25~60℃ ( Derating from 45℃)
Storage Temperature
-40℃~+80℃
Humidity
100% non-condensing
Warranty
Two Years
23
SCF Series MPPT Charge Controller Datasheet
Model
SMK-SCF-30A
SMK-SCF-40A
Solar System Voltage
Fan cooling version
SMK-SCF-50A
SMK-SCF-60A
12V/24V48V
Electrical
PV operating voltage
[email protected] [email protected]
[email protected]
17 [email protected] [email protected]
[email protected]
100Vdc
150Vdc
Max. PV open circuit voltage
Max. PV input power
Max. charging current
12V
400W
700W
12V 800W
24V
800W
12V 600W
24V 1200W
24V 1400W
24V 1700W
48V
1700W
48V 2300W
48V 2800W
48V 3400W
30A
12V
40A
50A
60A
Max. DC load current
40A
60A
Self Consumption
2W
4W
97%
97.8%
Conversion Efficiency
Protection
Overload, short circuit, high voltage ,high temperature protection
Battery charging
Battery Type
Sealed ,AGM, Gel, Flooded, User Define
Charging Algorithm
3-stage: Bulk, Absorption, Float, Equalize
Bulk charge voltage
Sealed:14.4V AGM Gel:14.2V Flooded:14.6V User define:10-15V
Float charge voltage
Sealed/Gel/AMG:13.7V Flooded:13.6V User define :10-15V
Equalize charge voltage
Sealed:14.6V AGM:14.8V Flooded:14.8V User define :10-15V
Low voltage reconnect voltage
10.2V
Low voltage disconnect voltage
9V
-5mV/℃ /2V with BTS(Optional)
Temperature compensation
Communication
RS485 with On line monitor system
RS232/Ethernet with On line monitor
system Optional
Net weight
1.8KG
3KG
Gross weight
2.1KG
4KG
Communication Port
Mechanical
Dimensions
230*170*60
290*180*90
Packing dimension
350*250*105
330*250*145
Cooling
Enclosure
Fan cooling
IP20
Environment
Ambient Temperature
-25~60℃ ( Derating from 45℃)
Storage Temperature
-40℃~+80℃
Humidity
100% non-condensing
Warranty
Two Years
24
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