SGC481585A MPPT Solar Charge Controller

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Product Information

Specifications

Manufacturer: Sun Gold Power Inc

Model: SGC481585A/SGC4815100A/SGC482585A/SGC4825100A

Version: 1.03

Website: www.sungoldpower.com

Product Usage Instructions

1. Introduction to Product

1.1 Product Overview

The controller is designed with sound electronic failure
detection and protection functions to prevent component damage from
installation errors or system failures. It features an LCD display
screen for data interaction, settings, and operations with mobile
apps and PCs.

1.2 Product Characteristics

The product is equipped with advanced technology for efficient
solar charge control and power management.

1.3 Description of Appearance and Interface

The product includes a liquid crystal display (LCD) for visual
information, Bluetooth 4.0BLE module for wireless connectivity, and
interfaces for battery and solar panel connections.

Frequently Asked Questions (FAQ)

Q: How can I monitor the system using a mobile phone app?

A: You can monitor the system using the mobile phone app
provided in the standard configuration. Ensure proper setup and
connectivity for accurate monitoring.

Q: What types of batteries are compatible with this solar

charge controller?

A: The controller supports lead-acid and lithium batteries.
Refer to the user manual for detailed instructions on battery
compatibility and settings.

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MPPT Solar Charge Controller
SGC481585A/SGC4815100A/SGC482585A/SGC4825100A
User Manual

SUNGOLDPOWER

Version: 1.03

Any change shall not be otherwise notified.

Sun Gold Power Inc

www. sungoldpower.com

Dear Users: Thank you for choosing our products!
Safety Instruction

1. The applicable voltage of the controller is beyond safety voltage of personnel. Before operation, please read the instruction manual carefully and start operating only after receiving safe operation training. 2) There is no parts requiring repair or maintenance within the controller, so please don’t disassemble or repair the controller without authorization. 3) Please install the controller indoors and prevent water against entering into the controller.
2. Please install the controller in a well-ventilated place and the cooling fans in operation have high temperature. 5) It is suggested to install a suitable fuse or breaker outside of the controller. 6) Before installing and adjust the controller wiring, please break the connecting wire of the solar panel battery and the fuse or breaker close to the battery terminal. 7) After installation, inspect whether all wires are connected firmly to avoid any hazard caused by accumulated heat owing to poor contact.

Warning: Indicating that the operation is hazardous, please fully prepared for safety before operation.
! Notice:
Indicating that the operation is destructive.
Tips:
Our main sales MPPT controller product model is SGC4825100A, please note the content of the parameters in the user manual when you use.

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Table of Contents

1Introduction to Product

03

1.1Product Overview

03

1.2Product Characteristics

03

1.3Description of Appearance and Interface

04

1.4System Wiring Schematic Diagram

05

1.5Introduction to Maximal Power Tracking Technology

06

1.6Introduction to Charging Stage (MPPT, Constant Voltage and Current)

06

2Technical Parameter

08

2.1Electrical parameter

08

2.2Battery Type Parameter by Default

09

3State instruction for indicator light

09

3.1Charge state indication

09

3.2State Display of Battery

10

3.3Type Indication of Battery

10

4Key

10

4.1Key function I: set battery type

10

4.2Key function II: recover factory default parameter

10

5 Parameter Setting and Special Function Use

11

5.1Monitoring Use of Mobile Phone APP (Standard Configuration)

11

5.2Application of Lead Acid Battery

11

5.3Application of Lithium Battery

11

5.4Setting of Charging Current

11

5.5Definition of RS485 Communication Interface

12

5.5.1Set as communication mode

12

5.5.2Set as parallel operation mode

12

5.5.3Remote on/off of charger

12

5.6TTL Communication

12

5.7Temperature Sampling of Battery

12

5.8Voltage Compensation Wire of Battery

13

5.9Programmable Relay Output

13

5.10Use of Parallel Operation Function

13

6Liquid Crystal Display

14

6.1Menu Schematic Diagram

14

6.2Menu Browse

15

6.3Set System Parameter via LCD

15

6.4Abnormal Code Display

16

6.5Common Problem and Treatment Method

17

6.6Installation Size of LCD

17

7 Product Installation

18

7.1 Installation Notice

18

7.2 Wiring Specification

18

7.3 Installation and Wiring

18

8Protection Function

20

8.1Introduction to Protection Function

20

9 System Maintenance

21

10Product Dimension

21

11Solar Controller : Solar APP

23

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1. Introduction to Product
1.1 Product Overview
The controller adopts the leading PowerCatcher maximal power Tracking technology in the industry to achieve maximal energy Tracking for solar panel, so that it can quickly and accurately trace the maximal power point of the solar battery, acquire the maximal energy of the solar panel and significantly improve the energy utilization ratio of the solar system. Widely applied to solar off-line photovoltaic system for managing solar panel and storage battery in operation, the controller is the core control component of off-line photovoltaic system.
The inside of the controller possesses sound electronic failure detecting and protection function to avoid the product component damage caused by installation error and system failure.
The controller is equipped with an LCD display screen to simultaneously support data interaction, setting and other operations with mobile phone APP, PC upper computer and other devices.

1.2 Product Characteristics
PowerCatcher maximal power Tracking technology can still trace the maximal power point of solar battery in the complicated environment. Compared with traditional MPPT Tracking technology, it enjoys higher response speed and higher Tracking efficiency. MPPT charge efficiency is greater than traditional PWM charge efficiency by about 15% ~20%. MPPT Tracking efficiency can be as much as 99.9%. Adopting advanced digital power technology, the circuit energy conversion efficiency can be as much as 98%. The products support lithium batteries, charging output has active voltage stabilization function. In case of open circuit of lithium batteries or BMS overcharging protection, the storage battery end of the controller shall output stable target voltages in time, thereby possessing good lithium electric activation function. Preset a variety of battery types: lithium batteries, sealed batteries, colloidal batteries, open batteries and selfdefinition. Lead-acid batteries support temperature compensation function. With charging line loss compensation, the voltage of the battery terminal can be accurately controlled. With current- limiting charging, in case of too much battery panel power (charging current is greater than rated current), the controller automatically reduces the charging power so that it can operate within the rated charging current. With built-in overtemperature protection mechanism, when the temperature exceeds the set temperature value, the charging power shall decline in a linear way with the temperature. It supports parallel function and breaks through the power limit of single unit. Therefore, combination of several units can meet greater charging power. With built-in bluetooth 4.0BLE module, it can achieve mobilephone APP data interaction. Supporting standard Modbus protocol, it provides protocol technology support to facilitate secondary development and application by users. Programmable relay output

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1.3 Description of Appearance and Interface

www. sungoldpower.com

1

2

8

+-

-+

7

9 10 11 12 3 4

56

No.

Name

No.

Liquid crystal display (LCD)

Bluetooth 4.0BLE module

Positive interface of battery

Negative interface of battery

Negative interface of solar panel

Positive interface of solar panel

Name RS485 communication interface
Key TTL communication interface Battery temperature sampling interface Battery voltage sampling interface
Relay output interface

Note: Negative poles of storage battery and solar battery are a common negative pole design.

1.4 System Wiring Schematic Diagram

E

9 10 + –

+-

-+

Voltage compensation wire Temperature sampling wire

04

PE grounding

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1.5 Introduction to Maximal Power Tracking Technology

Maximal power point tracing system is an advanced charge technology where the operation state of the electric module is adjusted so that the solar battery can output more electric energy. Owing to the nonlinear characteristics of solar battery array, there is an array of maximal energy output point (maximal power point), the traditional controller (on-off charging technology and PWM charging technology) cannot maintain storage battery charging at this point. Therefore, it is unable acquire the maximal energy of battery panel. However, the solar controller with MPPT control technology can trace the maximal power point of the array to acquire the maximal energy to charge the storage battery.
Taking 12V system as the example, the peak voltage (Vpp) of solar battery is about 17V, but the storage battery voltage is about 12V, when general charge controller is charging, the voltage of the solar battery is about 12V, the maximal power is not fully exerted. MPPT controller can overcome the problem and adjust the input voltage and current of the battery panel from time to time so that the input power can be the maximal value.
Comparing with traditional PWM controller, MPPT controller can exert the maximal power of solar battery. Therefore, bigger charge current can be provided. Generally speaking, compared with PWM controller, MPPT can improve energy utilization ratio by 15%~20%.

I ( A)

VP curve
VI curve P( W )

5. 0 MPPT point
4. 5

4. 0

3. 5

3. 0 2. 5 2. 0

1. 5

PWM

charge

1. 0

0. 5

0. 0

2. 8

5. 6

8. 4

11. 2

14. 0

16. 8 19. 6

94. 5 81. 0 67. 5 54. 0 40. 5 27. 0 13. 5 0. 0 U( V)

Fig.1-2 Output Characteristic Curve for Solar Battery

Owing to different ambient temperature and illumination conditions, maximal power point can change frequently. Our MPPT controller can adjust parameters according to different conditions so that the system can be close to the maximal operation points at any time. The whole process is completed fully automatically without any adjustment by users.

I ( A)

I (A)

Temperature of solar panel

Current decreases with reduction of illumination

With reduction of temperature, current maintains unchanged and power is increased.

20 30 40 50 60
70

U( V ) Open circuit voltage decreases with reduction of illumination

U( V) Open voltage decrease with temperature rise

Fig.1-3 Relation Between Solar Battery Output Characteristics and Illumination

Fig.1-4 Relation Between Solar Battery Output Characteristics and Illumination
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1.6 Introduction to Charging Stage (MPPT, Constant Voltage and Current)

1.6.1 Charging process of lead-acid battery

As one of the charging processes of lead-acid batteries, MPPT usually needs to be combined with equalizing

charge/lifting charge, floating charging and other charging methods to jointly complete the charging management

for storage batteries.

Charging voltage Equalizing charge voltage

a

b

MPPT Equalizing/lifting charging charge (duration)

c
Floating charging

Lifting charge voltage Floating charging voltage
Charging return voltage

Charging current

Time

Present current

Time
Charging Curve of Lead-Acid Battery
The charging stages of lead-acid batteries include MPPT charging, constant voltage charging (equalizing/lifting/floating charging) and current limiting charging.
a) MPPT charge
In MPPT charging stage, the battery voltage has not reached the target constant voltage value, so the controller will perform MPPT charging to maximize the charge amount from solar energy quantity to the storage battery. After the storage battery voltage reaches the constant voltage value, it shall automatically change to constant voltage charging.
b) Constant voltage charge
When the storage voltage reaches the target constant voltage value, the controller shall exit from MPPT charging and enter into constant voltage charging. With the progress of constant voltage charging, charging current shall drop gradually with time lapse. Constant voltage charging is divided into two stages, namely equalizing charge and lifting charge respectively. These two charging process shall not repeated (the equalizing charge interval is 30 days at a time by default).
c) Equalizing charge
Warning: Explosion Risk! Equalizing open-head lead-acid batteries can produce explosive gases and battery compartments must be well ventilated.
! Note: Device Damage!
Equalizing may increase battery voltage, but damage the level of sensitive DC load. Therefore, it is necessary to validate that the allowable input voltage of all loads is greater than the set equalizing charge value.
! Note: Device Damage!
Excessive charging and gas evolution may damage polar board of storage and result in peeling of active substances on the battery plate. Too high equalizing charge voltage or too long charging time may damage batteries. Please set related parameters according to the specification requirements of the batteries used in the system. Some types of batteries benefit from periodic equalizing charge, which mainly increases the charging voltage of batteries so that it is higher than the standard supply voltage. Equalizing charge can gasify the battery electrolyte, balance the battery voltage and complete the chemical reaction. Equalizing charge and lifting charge are not repeated in a charging process to avoid too much precipitated gas or overheated battery.
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Lifting charge
Generally, it is considered that the lifting charge stage lasts for 2h by default. When the duration reaches the set value, the system shall turn to the floating charge (lifting charge duration: only the self-defined battery type can be changed).

Floating charge
Floating charge is the last stage for constant voltage of lead-acid storage. The controller keeps the charging voltage at the floating charge voltage. At this stage, weak current charge is performed for the battery at this stage to guarantee that the battery maintains at the full charging state.
At floating charge stage, when the battery voltage drops to the lifting charge return voltage, after a period of time, the system shall exit from the floating charge stage and then enter into MPPT charge stage again.

1.5.21.5.2 Charging Process of Lithium Battery/Customized Lithium Battery

The charging stages of lithium batteries Charging voltage
contain MPPT charging, constant voltage

a
MPPT charging

b
Charge with constant voltage

charging, and current-limiting charging

a) MPPT charging

Lifting charge

voltage

In MPPT charging stage, the battery voltage

has not yet reached the target constant voltage.

The controller will perform MPPT charging to

maximize the charge amount from solar energy

quantity to the storage battery. After the storage

Time

battery voltage reaches the constant voltage value, it shall automatically change to b) constant voltage

Charging current

charging.

b) Constant Voltage Charging
Lifting charge is the unique constant voltage charge state. Therefore, only when the storage voltage drops to the set value for lifting and recovering charge, the system can exit from the constant voltage charging stage and then enter into MPPT charging stage again.

Present current

Time
Lithium battery charge curve

1.5.3 Current-limiting charge over rated current
Current-limiting charge runs through the whole charging cycle. In any charging stage, as long as it is detected that the current is beyond the rated current, it shall enter into the current-limiting charge automatically and the charging current is limited to the rated current.
1.5.4 Overtemperature and Current-Limiting Charge of Device
Overtemperature and current-limiting charge of device runs through the whole charging cycle. In any charging stage, as long as overtemperature of device is detected, it will automatically enter into linear current-limiting charge.

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2. Technical Parameter

2.1 Electrical parameter

Name of Parameter

Parameter Value

Type

SGC481585A

SGC4815100A

SGC482585A

SGC4825100A

System Voltage

12V/24V/36V/48V

No-load loss

0.54W

Battery voltage

9V~64V

Maximum PV open-circuit voltage

150V

250V

Maximum PV input current

70A

Maximum PV short-circuit current
Maximum voltage range at power point

70A Battery voltage +2~120V

Battery voltage +2~180V

Rated charging current

85A

100A

85A

100A

Settable charging current
Maximum output overcurrent protection

0-85A 85A

0-100A 100A

0-85A 85A

0-100A 100A

Maximum output power Power of solar panel (12V)

4400W 1100W

5280W 1320W

4400W 1100W

5280W 1320W

Power of solar panel (24V)

2200W

2640W

2200W

2640W

Power of solar panel (36V)

3300W

3960W

3300W

3960W

Power of solar panel (48V)

4400W

5280W

4400W

5280W

Charging conversion efficiency

98%

MPPT tracing efficiency
Temperature compensation coefficient Communication way

99% -3mV//2V (default, settable lead-acid); no temperature compensation
for lithium battery.
TTL/Isolated RS485; baud rate 9600, digital bit 3, stop bit 1, no check bit

Bluetooth

Built-in bluetooth 4.0BLE module, achieving mobilephone APP monitoring

Internal temperature protection

When interior temperature of controller is higher than the set value, it shall perform linear power reduction operation

External temperature sampling of battery

The temperature is used for battery temperature compensation and battery temperature protection

Programmable relay

DPST 10A/250VAC10A/30VDC

Protection function

Battery overcharging protection, battery over discharge protection, PV anti- reverse protection, reverse charge protection at night, interior overtemperature protection of controller and over-current protection in charge

Operation temperature

-35 +65(No derating within 40 )

Degraded ambient temperature

40

Elevation Protection grade Weight
Product size

3000m IP32 5.7kg
Conventional314227121mm MC4314259121mm
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2.2 Battery Type Parameter by Default

Parameter Contrast of Different Types of Battery

Battery type Set Voltage

Sealed lead-acid battery

Colloidal lead-acid battery

Open-head lead-acid battery

Overvoltage breaking voltage 16.0V

16.0V

16.0V

Equalizing voltage

14.6V

—-

14.8V

Lifting voltage

14.4V

14.2V

14.6V

Floating voltage

13.8V

13.8V

13.8V

Lifting recovery voltage

13.2V

13.2V

13.2V

Overdischarge recovery voltage 12.6V

12.6V

12.6V

Undervoltage alarm

12.0V

12.0V

12.0V

Overdischarge voltage

11.1V

11.1V

11.1V

Overdischarge cutoff

10.6V

10.6V

10.6V

Overdischarge delay

6S

6S

6S

Equalizing charge interval 30days

0days

30days

Equalizing duration

120 minutes

—-

120 minutes

Lithium battery 16.0V
—- 14.4V —- 13.2V 12.6V 12.0V 11.1V 10.6V
6S
—-
—-

Self-defined User (12V by default)
917V 917V 917V 917V 917V 917V 917V 917V 917V 1-30S 0250days
(0 indicate closing and equalizing charge function)
10600 minutes

Lifting duration
Temperature compensation mV//2V

120 minutes
-3

120 minutes -3

120 minutes -3

—- —-

10600 minutes
Automatic removing temperature compensation for lithium

3. State instruction for indicator light

3.1 Charge state indication

No.

State of Indicator Light Normal on Slow flash (on 1s, off 1s, period 2s) Single flash (on 0.1s, off 1.9s, period 2s) Quick flash (on 0.1s, off 0.1s, period 0.2s) Double flash (on 0.1s, off 0.1s, on once again 0.1s, off once again 1.7s, period 2s)

Off

Charge State MPPT Charge Lifting charge Floating charge Equalizing charge
Current limiting charge
No charge is started

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3.2 State Display of Battery

Color of Indicator Light

State of Indicator Light

State of Battery

Green

Normal on

Full battery voltage

Yellow Red

Normal on Normal on Quick flash (on 0.1s, off 0.1s, period 0.2s)

Normal battery voltage
Battery voltage is below the undervoltage point Battery overvoltage or overtemperature

3.3 Type Indication of Battery

Color of Indicator Light Red
Yellow Green Blue Purple Orange Cyan White

Type of Battery Open-head lead acid battery FLD Colloidal lead acid battery GEL Sealed lead acid battery SLD 12V lithium battery LI (lithium iron phosphate by default) 24V lithium battery LI (lithium iron phosphate by default) 36V lithium battery LI (lithium iron phosphate by default) 48V lithium battery LI (lithium iron phosphate by default) Self-defined USE (12V sealed lead acid by default)

4. Key

4.1 Key function I: set battery type
Press the key for 8s and the battery type indicator light starts flickering (the controller can turn off the charge at this time). At this time, after each press, the battery type indicator light turns to another color and there is a corresponding battery type. After the battery type is selected, press the key for 8s once again or 15s after no operation, the controller shall automatically save the battery type set at present and exit from the setting mode and enter into the normal operation mode; (LCD is the standard configuration. Generally, this method is not used for setting).

Self-defined battery White

open-head lead acid battery (Red)

colloidal lead acid battery (Yellow)

sealed lead acid battery (Green)

48V lithium battery (Cyan)

36V lithium battery (Orange)

24V lithium battery (Purple)

12V lithium battery (Blue)

4.2 Key function II: recover factory default parameter
Press the key for 20s and the red indicator light of the three ones on the controller flickers and the controller is restored to the factory default parameters.

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5. Parameter Setting and Special Function Use
5.1 Monitoring Use of Mobile Phone APP (Standard Configuration)
Blue tooth 4.0BLE module is integrated in the controller and users can use the mobile phone APP developed by our corporation to achieve data monitoring, setting and other operations to the controller.
Please contact business personnel to get related software and operation instruction.
5.2 Application of Lead Acid Battery

1. The LCD screen on the controller (see 6.3 set system parameters via the LCD screen) or mobile phone APP can be used to select the battery type matched with the battery. The changed system voltage can be effective only upon restart. 2) If the preset lead-acid battery parameters are not suitable for the battery used by users and users can use customization. All parameters customized can be set only through communication, such as mobile phone APP, PC client software, or perform communication setting via other user system in accordance with communication protocol and controller. (At delivery: the self- defined default values are same as the sealed lead acid battery parameters. The system voltage is 12V)
   5.3 Application of Lithium Battery
   Preset LI for controller containing lithium iron phosphate of specifications 12V/24V/36V/48V. If the preset values for the lithium battery are not suitable for users, you can perform communication setting with the controller via mobile phone APP, LCD screen of the device, external LCD screen and other systems according to the communication protocol through other systems of the user.
   Customization may be lead-acid batteries or lithium batteries. To apply lithium batteries in the self-defined battery type, it is required to meet the following conditions: 1) Set a fixed voltage for the system voltage, one of 12V/24V/36V/48V. 2) Equalizing charging time interval is set as 0; 3) Equalizing charging time is set as 0; 4) Temperature compensation is set as 0. Meeting the above four conditions, the system automatically identifies the batteries as lithium batteries. Therefore, the system possesses lithium battery activation, charging and other charge control logic.
   5.4 Setting of Charging Current
   The rated current of the controller is 100A, which supports the setting of communication instructions, ranging from 0.00 A to 100.00A. Via mobile phone APP or the user system provided by our company, communication setting is performed for specified register E001H with the controller via the mobile phone APP or the user system according to the protocol. Please refer to our Modbus protocol for setting and analysis.

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5.5 Definition of RS485 Communication Interface
5.5.1 Set as communication mode Users can utilize Modbus protocol to perform data monitoring, parameter setting and other operations via the
port for the controller via the port. 5.5.2 Set as parallel operation mode
The parallel operation mode can be used only after the device is set as parallel operation mode, 5.5.3 Remote on/off of charger
Two pieces of remote on/off input signal are integrated in 485 communication wire. The charging can be broken only by short circuit of pins and in the communication wire.

2 42 26 82 1 23 52 27

No.

Definition NC NC
Remote on/off of charger Remote on/off of charger

No.

Definition Isolate power ground
DD+ Isolate positive power supply

5.6 TTL Communication
Users can utilize Modbus protocol to perform data monitoring, parameter setting and other operations for the

controller via the port.

No.

Definition

Controller supplies +12.8V outwards.

Data receiving terminal RX of controller

Data sending terminal TX of controller

GND

5.7 Temperature Sampling of Battery

Not connected to temperature sensor, it is 25 by default; After the temperature sensor is connected, high and low temperature protection is performed or charging temperature compensation is performed for the battery (there is no temperature compensation for lithium battery).
Wiring method: the wiring terminal of the temperature sensor is connected to (9) and the temperature sensor is fixed thereon.

9 10

+-

-+

Temperature sampling wire

11

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5.8 Voltage Compensation Wire of Battery
Owing to the configuration, the charging power is great and the diameter of wire from battery to the controller is small. Therefore, the voltage collected by the controller terminal is greater than the practical voltage of the battery terminal and the battery cannot be fully charged. In certain degree, the voltage of the battery terminal can be more accurately collected via the voltage sampling wire of the battery and the voltage difference can be output in a compensated way, so that the battery terminal can get more reasonable charging voltage.
The positive and negative poles of the battery are respectively connected to the positive and negative poles of the battery voltage sampling terminal (10) via the voltage compensation wire. Please note that the left is the positive terminal and the right is the negative terminal.
The wiring way is shown in the figure below:

9 10

+-

-+

Voltage compensation wire

5.9 Programmable Relay Output

Single-pole double-throw (DPST) relay

Relay contact specification 250VAC/10A, 30VDC/10A

From left to right, there are NC contacts, common points and NO contacts.

Relay triggering condition:

1. When battery voltage is normal,the relay

2. In case of overvoltage or over discharge of the battery,

coil doesn’t operate in NC state

relay coil operates in NO state (C and NO are conducted)

(C and NC are conducted)

NC C NO
C

NC C NO
C

5.10 Use of Parallel Operation Function
5.10.1 Parallel operation function: Parallel operation function means that several controllers charge one battery pack one to one uniformly. Each
controller has one independent solar panel; these controllers are connected via RS485 communication wires and the host system uniformly synchronizes the charge state stage, constant voltage value and other parameters to the slave. In this way, the device can break through the power limit of single device. In addition, parallel operation of several devices can meet greater charging power demands. 5.10.2 Parallel operation step: 1) RS485 communication ports of each controller are set as parallel operation function The device is only designed with a 485 communication. Therefore, parallel operation function is required and it is necessary to set RS485 communication function as the parallel operation function (for related protocol data, please refer to our Modbus protocol)
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PDU Operation Address
E327H E327H

Data
0000H 0001H

Function
RS485 communication interface is taken as communication function (default)
RS485 communication interface is used as parallel operation function

2. The device addresses of each controller are set as 1, 2, 3, 4….. according to the sequence. 3) D+ of different RS485 communication wires are connected together and D- are connected together in parallel. 4) Afterwards, power is supplied to these controllers. Note: 1) Host and slave are decided and changed by software algorithm, namely host and slave identifications are not
   determined. 2) As long as it is not the time when the host sends the synchronizing information, operation to E327H is effective. 3) The parallel operation function can also send and receive data within certain time of period. However, if data receiving
   and sending is at the time when the host sends synchronizing data to 485 bus, there maybe communication data conflict error!!! 4) The controller unit can automatically identify the host and the host shall regularly send the synchronizing information to RS485 bus. The slave receives the information for implementation. 5) During parallel operation process, once the host fails to perform charging or doesn’t perform charging, the slave meets the charge. After a period of time, the slave shall generate new host to further manage the charge. At this time, previous host becomes a slave.

6. Liquid Crystal Display

LCD module as the standard configuration of the controller can be installed on the controller surface or in other places via DB9 extension wire in accordance with practical conditions.

6.1 Menu Schematic Diagram

Day indication

Charging indication

Night indication

Solar panel indication

Battery indication

Load output indication — not used

Charge stage
indication

System voltage

12V/24V/36V/48V

Setting indication

Abnormal indication

Communication indication

14

Parameter display area
Unit display area
Battery type

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6.2 Menu Browse
Main interface

www. sungoldpower.com

Solar battery voltage Battery voltage

Battery capacity

Charge current

Error code

Controller temperature

Charge Charge ampere hours power

6.3 Set System Parameter via LCD

Setting method: 1). Under any menu, press key “ENTER” for long time to enter into “Parameter Setting” menu: (1) Press key “ENTER” for short time and adjust the parameter value; (2) Press key “SELECT” for short time and select setting item; (3) Press key “ENTER” for 2 seconds, save and exit from setting mode; (4) Select “FLD/GEL/SLD/LI” battery type and press key “SELECT” to only perform switching between “system voltage”
and “battery type”. (5) After selecting “USE” for customizing battery type, press key “SELECT” for switchover among “system voltage
/equalizing charging voltage/lifting charging voltage/floating voltage/over discharge return voltage/over discharge voltage”. Note: (1) The changed “system voltage” can be effective only after poweron again. (2) Users must be careful while customizing parameters. The system may not operate normally owing to inaccurate parameter!

2. Customized USE menu

Battery type

System voltage

Equalizing charge voltage (USE)

12V24V38V48V

EQUALIZE
Lifting charge voltage (USE)

Over discharge return Over discharge voltage (USE) voltage (USE)

BOOST
Floating voltage (USE)

FLOAT

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No.

Liquid Crystal Display

1

USE

2

12V/24/36V/48V

3

EQUALIZE

4

BOOST

5

FLOAT

6

Set Item

Parameter Range

Remark

Battery type
System voltage
Equalizing charging voltage (USE) Lifting charging voltage (USE) Floating charging voltage (USE)

—
12V/24/36V/48V
9.017.0V 9.017.0V 9.017.0V

Customizing battery type
“12V/24/36V/48V” simultaneous on indicates
automatic identification
—
—
—

Over discharge recovery voltage (USE) 9.017.0V

—

7

Over discharge voltage (USE)

9.017.0V

—

6.4 Abnormal Code Display

Error Code

No.

Displayed by LCD

Note

Implementation Result

1

E0

No abnormity

Normal system

2

E1

Battery over discharge Battery voltage rises to over discharge return voltage

and over discharge prompt is released.

3

E2

Battery over voltage

No charging

4

E3

Under voltage alarm of battery

Battery voltage is lower than undervoltage alarm threshold value, it is only prompted that the system is normal.

7

E6

Interior over temperature

Excessive internal temperature of controller, MPPT controller starts linear power charge; it shall recover

of controller

automatically after reducing to certain value.

8

E7

Battery over temperature Turn off the charging and then recover the charging

automatically after the voltage is lower than certain

value.

Excessive charge current

9

E8

of input power of solar panel MPPT controller is limited within rated current range

10

E10

Over voltage of solar panel Over voltage of solar panel, turn off the charging and

recover the charging when the voltage is lower than

the set value.

Battery not connected or As long as the solar panel voltage meets the charging

12

E15

feedback electricity of lithium battery

condition, lithium battery has constant voltage output, lead-acid battery has no voltage output, and it shall

recover to normal after the battery is connected.

13

E16

Over temperature of battery No charging

15

E18

BMS over charge protection No charging

16

E19

Low temperature of battery No charging

16

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6.5 Common Problem and Treatment Method

Phenomenon
Indicator light or LCD is not on

Treatment Method
Please check whether battery and solar panel are correctly connected.

No datum on LCD
There is voltage on the solar panel, no voltage output at battery end, display code E1

Poor communication; check the communication wire.
No battery can be detected at the lead-acid battery terminal. There is no voltage output from both ends of the battery. It shall return to normal state after battery is connected.

Connected with 12V/24V/36V/48V normal voltage battery and the battery icon on the LCD flashes slowly, display error E1

Check whether it is set as corresponding system voltage or automatic identification, restart the controller; After setting the system voltage, it is designed for safety and can be effective only after restart.

Battery icon indicator light flashes quickly without charging. Display code E1

Overvoltage of system; inspect the overvoltage reason of the battery. It shall restore after reduction of voltage.

The device cannot be searched by mobile phone Bluetooth.
No charging by controller.
Other problem or insoluble abnormity

Inspect whether other mobile phones are connected with the Bluetooth setting.
Inspect whether wires are correctly connected, whether solar panel voltage exceeds the rated value, whether battery exceeds the voltage, check LCD error code. Inspect whether there is interior overtemperature, exterior overtemperature, low temperature of exterior lithium, or whether the lead-acid battery is open, etc.
Try to restore the factory setting and then set related parameters in accordance with system configuration. Take care in the operation!

6.6 Installation Size of LCD
Product size:104.555.511.8mm Installation size: 96*3.5mm

2-3.5

88.4 96 104..4
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7. Product Installation

7.1 Installation Notice Please be careful in battery installation. To open the open-head lead-acid battery, it is required to wear a pair of goggles. Once contacting the acid liquid of the battery, please flush with clear water immediately. Avoid placing metal articles close to the battery to prevent short circuit of battery. The battery in charging may generate acid gas, so please guarantee well-ventilated ambient. The battery may generate flammable gas, please keep away from spark. Please avoid direct sunlight and rain water in outdoor installation. The virtually connected points and corrosive wires may generate heat and melt the insulation layer of the electric wire, burn surrounding materials and even cause fire. Therefore, it is required to guarantee that all connectors are tightened. The electric wires shall be fixed with wire ties to avoid connector looseness in mobile application. To connect the system, the voltage at the output terminal of the component may exceed safe body voltage. Therefore, it is required to use insulation tools in operation and guarantee dry hands. The wiring terminal of the battery on the controller can be connected with only one battery, or with a set of battery. In the manual, the instructions are only for one battery. However, they are applicable to a set of batteries. Please observe the safe suggestion of the battery manufacturer. The system connecting wire is selected based on the current density no less than 4A/mm2. The ground terminal of the controller shall be grounded. In installation, the battery shall not be reversely connected, which may cause irreversible damage!

7.2 Wiring Specification
It is required to observe national and local electrical specification requirements for wiring and installation ways. PV and battery wiring specification must be selected based on rated current. Please refer to the table below for the wire specification.

Type

Maximal input

Maximal wire size at PV terminal

current of PV (mm2/AWG)

Rated charge current

Wire size of battery (mm2/AWG)

SGC481585A

60A

SGC4815100A

70A

SGC482585A

60A

SGC4825100A

70A

15/5 18/4 15/5 18/4

85A 100A 85A 100A

21/4 25/2 21/4 25/2

Earthing instructions: The screw hole at the side earthing mark of the radiator is earthing. If earthing is needed, the diameter of earthing wire shall not be less than 15/5(m /AWG)

7.3 Installation and Wiring
WarningExplosion hazard! Never install the controller and open-head battery into an enclosed space or in an enclosed room with possible gathering of battery gas.

WarningHigh voltage is hazardous! Photovoltaic array may generate high open voltage. Before wiring, please break the breaker or fuse. Please be careful during the connection process.
! NoteTo install the controller, please guarantee that there is enough air flowing through the cooling fin of
the controller. At least leave 150mm space above or below the controller so as to guarantee natural and convective heat dissipation. If installed in an enclosed box, please guarantee reliable heat dissipation via the box.

Sun Gold Power Inc

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150mm

Hot air

SUNGOLDPOWER

150mm

Cold air

Step 1: select an installation place It is prevented to install the controller to a place with direct sunlight, high temperature and possible water inlet. In addition, it is required to guarantee well ventilation around the controller. Step 2: fix screw Mark a sign at the installation position in accordance with the installation size of the controller. Drill four installation holes with proper size at 4 marking positions. Afterwards, fix the screws to the upper two installation holes. Step 3: fix controller Align the fixing hole of the controller with two screws fixed in advance, then hang the controller and fix the lower two screws.

Fig. 2.1 Installation and Heat Dissipation

Step 4: Wiring In order to guarantee safety in installation, we recommend a wiring sequence for the main circuit; it is prohibited to connect the positive and negative poles of the battery reversely!!!!!
SUNGOLDPOWER

1

2

4

3

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Warning: Danger of electric shock! We strongly recommend to connect the fuse or breaker at the photovoltaic array and the battery terminals to prevent electric shock hazard in wiring or inaccurate operation. Furthermore, before wiring, it is required to guarantee that the fuse or breaker is in open state.
Warning:Danger of high voltage! Photovoltaic array may generate high open voltage. Before wiring, please open the breaker or fuse,
WarningDanger of explosion! Short circuit of positive and negative terminals of battery and wires connected to the positive and negative poles may cause fire or explosion. Please take care in operation. Please connect the battery at first and then the battery panel. Please observe the connecting way of pole “+” before pole “-“. When all power lines are connected firmly and reliably, inspect whether the wires are correct once again and whether the positive and negative poles are connected reversely. After it is confirmed that all are correct, connect the battery fuse or breaker at first and then observe whether LED indicator light is on. If the light is not on, please immediately cut the fuse or breaker, and then inspect whether the wires are correctly connected. If the battery is connected normally, connect the battery panel. If the sunlight is sufficient, charging indicator light of the controller shall be normally on or flickers, start charging the battery.
! Note: install the battery fuse close to the battery terminal as far as possible. It is suggested that the
installation distance shall not exceed 150mm.
8. Protection Function
8.1 Introduction to Protection Function
Waterproof Waterproof grade: IP32 Overtemperature protection inside device When interior temperature of the controller is beyond the set value, the controller shall reduce the charging power or even break automatically in charging to further slow down temperature rise in the controller. Overtemperature protection of battery To achieve overtemperature protection of battery, it is required to connect the temperature sampling sensor of battery externally. When it is detected that the battery temperature is high, stop charging. When the battery temperature is reduced to be lower than the set value by 5, charge shall be restored automatically after two seconds. Overpower protection for input When the battery panel power is greater than the rated power, the controller shall limit the charge power within the rated power range to prevent controller damage caused by excessive current. At this time, the controller shall enter into the current limiting charge. Overvoltage of photovoltaic input terminal In case of excessive voltage at photovoltaic array input terminal, the controller shall automatically cut the photovoltaic input. Reverse protection for photovoltaic input When the photovoltaic array polarity is connected reversely, the controller shall not damage and shall further operate after wiring error is corrected. Anti-reverse charge protection at night It is required to prevent the accumulator against discharge via solar battery. Special notice: there is no reverse wiring protection function for battery.

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9. System Maintenance
In order to guarantee that the controller can maintain the optimum operation performance for long time, it is suggested to inspect following items regularly. Confirm that air flow around the controller cannot be blocked and clear away the dirt or sundries on the radiator. In case of abnormal failure or error prompt, adopt corrective measures in time. Inspect whether there is corrosion, insulation damage, high temperature, burning/discolor sign on the wiring terminal, whether the shell is deformed. If any, perform repair or replacement in time. Any wire with exposure, damage, poor insulation performance shall be repaired or replaced in time. Any dirt, nesting, insect or corrosive phenomenon shall be cleared in time.
WarningDanger of electric shock! To carry out above operation, please ensure that all power of the controller has been broken. Afterwards, perform corresponding inspection and operation! Any nonprofessional shall not operate without authorization.
10. Product Dimension
Common size

Sun Gold Power Inc -MC4 size
Product size314259121mm Installation size228*171mm Fixing hole position8mm Wire specification20-2AWG

www. sungoldpower.com

Product size:314227121mm Installation size:228*171mm Fixing hole position: 8mm Wire specification:20-2AWG

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Sun Gold Power Inc

Download

Google PlayAndroid

www. sungoldpower.com

Model

MC4860N15

SGC4825100A

23

References

• Home Solar System Kit,Power Inverter,Solar Inverter,Off Grid Inverter

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