Anhui Yine YN-CA Buck Series User manual

Anhui Yine Technology Co., Ltd
YN-CA/CB/CC/CD Buck Series
Solar Charge Controller
User Manual
Anhui Yine Technology Co., Ltd
Dear customer, thank you for choosing our products. Please read the following instructions carefully
before using this product:
Please keep this manual for future reference

YN-C Buck series solar charge controller
Contents
I. Safety instructions:..........................................................................................................................................1
1.1 Safety signs.......................................................................................................................................... 1
1.2 Safety instructions............................................................................................................................... 1
II. Product Features............................................................................................................................................3
1. Overview..................................................................................................................................................3
2. product features..................................................................................................................................... 3
3. product appearance...............................................................................................................................4
III. Installation Instruction................................................................................................................................. 5
1. installation precautions..........................................................................................................................5
2. installation instructions.......................................................................................................................... 6
3. Wire.......................................................................................................................................................... 7
4.photovoltaic array requirements........................................................................................................... 9
5. able selection requirements................................................................................................................. 9
6. Communication port description.......................................................................................................... 9
IV. Operate instruction.....................................................................................................................................10
4.1 Indicator function................................................................................................................................10
4.2 Setting Button..................................................................................................................................... 11
4.3 LCD display.........................................................................................................................................11
4.4 Setup operation..................................................................................................................................12
V. Device parameters.....................................................................................................................................16
5.1 Protection function............................................................................................................................16
5.2 Troubleshooting................................................................................................................................ 17
5.3 system maintenance........................................................................................................................ 19
VI. Warranty commitment............................................................................................................................... 19
VII.Device parameters.....................................................................................................................................20
VIII.Installation Dimension.............................................................................................................................. 22
IX Packing list and Monitoring options.........................................................................................................25

YN-C Buck series solar charge controller
1
I. Safety instructions:
1.1 Safety signs
The following safety symbols may appear in this manual and their meanings are as
follows:
safety symbols
signification
Danger
Indicates that if the safety warning is ignored, there is a serious
accident that may lead to personal injury.
Warning
Indicates that if safety warnings are ignored, there is a risk of serious
injury, serious equipment damage or major business interruption.
Notice
This means that if safety warnings are ignored, there is a risk of
moderate injury, moderate equipment damage or partial business
interruption.
Insturction
Indicates that the content is additional information for the body.
For electrical and electronic equipment, safety involves the entire process of installation,
commissioning, operation and maintenance. Therefore, incorrect use or misuse will
endanger the life and personal safety of the operator or a third party and the safety of the
equipment. In order to avoid personal injury and damage to the equipment, all safety,
warnings and cautions such as the following are strictly observed during operation and
maintenance.
1.2 Safety instructions
Warning！
All installation operations on the controller must be performed by a qualified technician.
Professional and technical personnel must undergo special training, complete the manual and
understand the safety related to the operation.
If a non-professional person performs installation operations and causes personal injury,
the company will not be responsible.
Failure to install and operate the controller in accordance with the instructions in this
manual will result in damage to the controller and will not be covered by our warranty.
①Before installion
Notice！
When receiving the product, first check the MPPT series controller for damage during
transportation. If you find any problem, please contact our company or the transportation
company immediately.
②installing
Before installing the MPPT controller, make sure that the MPPT controller has not been
electrically connected and powered.

YN-C Buck series solar charge controller
2
Warning!
Damage to the MPPT controller caused by the following conditions, or other damages will
not be covered by our warranty.
When configuring the PV array, ensure that the maximum short-circuit current on the DC
side is within the allowable range of the MPPT controller, otherwise the MPPT may be
irreparable.
When configuring the PV array, make sure that the open circuit voltage of each PV string
does not exceed the maximum input range of the MPPT controller, otherwise the MPPT
controller will be irreparable.
The selected controller charging current should not be greater than 0.3 times the battery
capacity. If it is greater than the battery will be damaged or the battery life will be reduced.
Improper selection of the MPPT controller installation environment will affect machine
performance and may cause machine damage.
Do not install the MPPT controller in a flammable or explosive place or in a place where
flammable or explosive materials are stored.
Do not install the MPPT controller in an explosive location.
Do not install the MPPT controller in a location where it may be exposed to lightning strikes.
Do not install the MPPT controller in a place with a lot of salt spray.
Good ventilation is required when the MPPT controller is in operation.
The MPPT controller needs to be installed upright and ensure that the air duct is
unobstructed.
Warning!
Always disconnect the PV array, battery, load, etc. (circuit breaker) or fuse before all
devices are fully connected.
Prevent water from entering the inside of the controller.
Note!
All electrical installations must comply with local and national electrical installation
standards.
To ensure safe operation, proper grounding, proper conductor size and the necessary
short-circuit protection are required.
The connection cable must be selected to the appropriate specifications, and the
connection is secure and well insulated.
After installation, check that all wiring connections are tight to avoid the risk of heat build-up
due to virtual connections.
③In Operation
Danger!
Do not open the machine cover while the MPPT is powered!
④Repair
Danger!
Repair work must be carried out by professional service technicians.
The machine needs to be powered off before maintenance, and it can be disassembled
after waiting for 5 minutes after power off.

YN-C Buck series solar charge controller
3
II. Product Features
1. Overview
Thank you for choosing the YN-CA/CB/CC/CD buck type solar charge controller.
Based on multi-phase synchronous rectification technology and common anode
design, this series of products adopts advanced high-speed processor and MPPT
control algorithm, featuring high response speed, high reliability and high industrial
standard.
The MPPT control algorithm used in this series can quickly track the maximum
power point of the PV array in any environment and obtain the maximum energy of
the solar panel in real time. The multi-phase synchronous rectification technology
can guarantee the pole in any charging power environment. High conversion
efficiency, compared with most of the current BUCK, greatly improve the energy
efficiency of the solar system; the controller can be connected to the host computer
through RS485, support WIFI module and GPRS module to expand APP cloud
monitoring, can be applied to communication base stations, households Use
systems, street lighting systems and field monitoring.
2. product features
Advanced multi-phase synchronous rectification technology also has high
conversion efficiency in low power charging environment.
Has an ultra-wide PV array operating voltage range.
Advanced MPPT maximum power point tracking technology, the tracking
efficiency is not less than 99.5%, compared with the ordinary PWM algorithm,
the efficiency is increased by 15 to 20%.
Using high-quality imported components and advanced power conversion
circuit, the maximum conversion efficiency can reach over 98%, the full load
efficiency can reach 97%, and a variety of tracking algorithms can be combined
to quickly track the maximum power point.
Three-stage charging method: MPPT-lifting charging-floating.
12V/24V/48V battery system automatic identification function（YN-CA has no
48V system）.
RS485 communication can provide communication protocol to facilitate unified
management and secondary development for customers.

YN-C Buck series solar charge controller
4
The controller running parameters can be viewed and set through the PC host
computer and mobile phone APP. For details, refer to the host computer and
APP manual (optional).
With battery temperature compensation.
It has comprehensive protection functions such as overcharge, over discharge,
over temperature, overload, reverse connection and so on.
3. product appearance
3.1 product appearance
pic 2-1: Product appearance dimension drawing
Table 2-1：Product weight and size
parameter name
Weight and Size
Model no.
YN-CA
YN-CB
YN-CC
YN-CD
weight(kg)
0.55Kg
1.55kg
2.45kg
3.9kg
Size L*D*H(mm)
113.1*141.5*46
mm
191.9*169.4*87
.3mm
241.9*193.4*104.
3mm
325.9*222.4*109
.3mm

YN-C Buck series solar charge controller
5
3.2.Interface definition
pic2-2 Product interface definition
Table 2-2 Product interface definition
NO.
Name
Function
Instruction
1
PV+
Photovoltaic array
positive electrode
PV array input
2
PV-
Photovoltaic array
negative
3
BAT+
Battery positive
Battery pack terminal
4
BAT-
Battery negative
5
LOAD+
DC load positive
DC load output (YN-CD does not have
this output)
6
LOAD-
DC load negative
7
Temp sensor
External temperature
test terminal
Measuring battery temperature
8
RS485
Communication port
Realize the monitoring of host computer,
WIFI and GPRS communication
III. Installation Instruction
1. installation precautions
(1) You must read the entire installation chapter and familiarize yourself with the installation
steps before installation.
(2) Be very careful when installing the battery. For the installation of the open lead-acid
battery, wear a protective mirror. When it comes into contact with the battery acid,
please rinse it with clean water.
(3) Avoid placing metal objects near the battery to prevent the battery from short-circuiting.

YN-C Buck series solar charge controller
6
(4) Acid gas may be generated when the battery is being charged to ensure good
ventilation around the battery.
(5) Please install indoors and install outdoors to avoid direct sunlight and rain.
(6) The connection point of the virtual connection and the corroded wire may cause great
heat to melt the insulation of the wire, ignite the surrounding materials, and even cause
fire, so ensure that the connectors are tightened, and the wires are preferably fastened
with the cable tie. To avoid loose wires when the application is moving and the wires
are shaken.
(7) The installed battery pack should match the controller charging voltage and the
recommended charging current range.
Danger！
Explosion hazard! Never install the controller and battery in the same confined space!
Also do not install in a confined space where battery gas may collect.
2. installation instructions
Step 1: Choose the installation location
Avoid installing the controller in direct sunlight, high temperatures, and easy access to
water, and ensure adequate ventilation around the controller.
Step 2: Unpacking and checking
(1)Check the outer packaging for damage or deformation;
(2)Unpacking inspection: one controller, one manual, one attachment, etc.;
(3)Check the appearance of the mainframe and the accessories are in good condition
If you are concerned about the above abnormal situation, please contact us.
Step 3: Fixed controller
Install the mounting ear fittings on the top of the top of the cabinet at the reserved
installation position. Fix the controller to the mounting platform or cabinet mounting bracket
with screws through the mounting ears. Allow sufficient ventilation and cooling space
around the installation.

YN-C Buck series solar charge controller
7
pic 3-1 Reserved space map around the equipment installation
3. Wire
Note: For installation safety, we recommend a wiring sequence
Note: The MPPT series controller is a common negative design.
Caution: Do not connect the electrical equipment that exceeds the surge power of
the controller to the load terminal to prevent damage to the controller!
Warning: When you need to use the mobile, make sure that all the wirings are fixed.
Because the virtual connection points may cause heat to accumulate, it may cause
fire in severe cases;
Step 1: Connect the battery, PV module, load, temperature sensor, monitoring
background.
Connect the battery, load, PV module, temperature sensor, monitoring background
(host computer / WIFI module / GPRS module) in turn, disconnect all switches during the
wiring process, pay attention to distinguish between positive andnegativeBefore connecting
the battery, make sure the battery is in a normal state to ensure normal operation of the
system.egative cable access.
Warning: Do not connect the PV panel to the battery terminal of the controller, as it
will burn out the controller.It is strictly forbidden to make the battery positive or
negative, extremely short circuit, otherwise it will cause fire or explosion hazard,
please be careful.
Step 2：Wiring diagram
Lock the cable to the binding post through the mounting hole on the lower side of the
cabinet.

YN-C Buck series solar charge controller
8
Pic3-2 Wiring diagram
Description: The monitoring background supports the PC host computer, supports the WIFI
module and the GPRS module to expand the APP cloud monitoring (optional). For details,
see the PC host computer and the APP user manual;
The controller defaults to lead-acid batteries. If you need to connect the other types of
batteries, you need to set the corresponding battery type and series number. For details,
please refer to the relevant settings of the PC host computer or APP manual.
Caution！
1. Danger of electric shock! It is forbidden to touch the live parts of high voltage photovoltaic
modules with bare hands;
2. Make sure that the solar array voltage in the system does not exceed the maximum input
voltage range of the controller;
3. The system needs to be connected to the inverter. Please connect the inverter directly to
the battery. Do not connect to the load end of the controller.

YN-C Buck series solar charge controller
9
Step 3: Check the connection
Check that all wiring polarity is correct and the terminals are locked;
Step 4: Power On Sequence
Recommended opening and closing sequence: sequentially close the battery pack switch,
photovoltaic switch or load switch;
Turn off the PV and load switches before turning off the battery switch.
4.photovoltaic array requirements
Table 3-1 Photovoltaic electrical parameters
5. able selection requirements
The following table shows the diameter of the copper wire according to the current level.
The actual cable size is greater than or equal to the data in the table:
Table 3-2 cable size
6. Communication port description
Photovoltaic electrical parameters
MODEL
YN-CA
YN-CB
YN-CC
YN-CD
PV array open
circuit voltage range
20V～80V (12Vbattery
system)
20V～100V (12V battery system)
20V～100V (12V battery
system)
40V～145V (24V battery system)
40V～145V (24V battery
system)
40V～80V (24V battery
system)
80V～145V (48V battery system)
160V～240V(48V battery
system)
160V～240V(96V battery
system)
Cable selection table
Current level /A
10
20
30
40
50
60
70
80
100
120
Wire diameter
/mm2
2
4
6
8
10
12
14
16
20
24
AWG
14
11
9
8
7
6
5
5
4
3

YN-C Buck series solar charge controller
10
IV. Operate instruction
pic 4-1 Display panel image
4.1 Indicator function
The LED indicators on the display panel are fault light (red), charge indicator (yellow), and
load indicator (green). The functions are defined as shown in the following table.
Table 4-1 Indicator definition
Indicator light
status
definition
Remar
ks
1
Fault indicator
(red)
Extinguished
Working normally, no fault
2
Constantly light on
error
3
Charging
indicator (yellow)
Light off
No charging
4
Light on
MPPT charging
5
Slow flashing
Floating charge
6
Fast flashing
Boost charging
7
Output indicator
(green)
Light on
Output normally
8
Light off
Light control, timing light normally
off output
9
Slow flashing
Battery over discharge off load
Needle
Definition
Note
1/2/3/4
Air
Air
5
RS485-A
RS485-A
6
RS485-B
RS485-B
7
VDC +12
12V/400mA
8
GND
Power
ground

YN-C Buck series solar charge controller
11
10
fast flashing
Battery over discharge off load
4.2 Setting Button
table4-2 setting button function
button
Effect
Remarks
Function 1: Main menu key, function 2: parameter setting
save key;
Exit the setup interface button;
Function 1: display page on page display, function 2:
parameter setting plus;
Function 1: Display page under parameter, function 2:
parameter setting minus;
UP and DOWN buttion Switching function:
pic 4-2 UP and DOWN Button display interface switching diagram
4.3 LCD display
The display of the controller adopts the segment code screen display mode, and the
display layout diagram is as follows:

YN-C Buck series solar charge controller
12
pic 4-3 Display
Table 4-3 Icon function introduction
Table 4-4 Field function introduction
Field
name
Definition
Function Description
Ubattery
Battery
voltage
The field lights up and displays the current battery voltage in
the data display area
Upv
PV panel
voltage
The field lights up and displays the current PV panel voltage in
the data display area
Icharge
Charge
The field lights up and displays the current battery charging
Icon name
definition
Function Description
day
The icon lights up to indicate daylight
night
The icon lights up to indicate the night
Solar panel
The icon lights up to check the PV array access
battery
The icon lights up to indicate battery access and the inside
indicates battery voltage
load
The load is lit to indicate that the load has an output
Status icon
The icon lights up and scrolls to indicate the chargevstatus
and discharge status,respectively.
Failure icon
The icon flashes to indicate that the system has a fault
condition.

YN-C Buck series solar charge controller
13
current
current in the data display area
Iload
Discharge
current
The field lights up and displays the current battery discharge
current in the data display area
Pcharge
Charge
Power
The field lights up and displays battery charging power in the
data display area
Uunder
Undervolta-ge
The field lights up, can set the battery undervoltage value,
when the battery undervoltage, this field flashes
Runder
Return of
undervolta-ge
Field lights up, battery undervoltage return voltage can be set
Uover
Overcharge
voltage
The field lights up and the battery overcharge voltage can be
set. When the battery is overcharged, the field flashes
Rover
Overcharge
return
Field lights up, battery overcharge return voltage can be set
Float
Floating
Charge
Voltage
The field lights up to set the battery floating charge voltage,
and in the floating charge stage, the field flashes
BCV
Boost charge
The field lights up to set the battery to raise the charging
voltage, and during the lifting charging phase, the field flashes
ECV
Equalizd
charge
The field lights up to set the battery equalization charge
voltage, and in the equalization charge phase, the field flashes
MPPT
MPPT charge
During the MPPT charging phase, the field flashes.
Time
Time control
period 1 set
Field lit,you can set the first time control (light control first light),
when set 24, the controller is for household mode. The default
value is 24.
Time1
Time Control
Time 2 Set
Field lit, in street lamp mode, you can set the second time (light
control lights after the lights out time).
Time2
Time Control
Period 3
Field lit, in street lamp mode, can set the third time period (light
control second light).
L-CON -V
Light control
Voltage Set
The field lights up, the first digit of the display area displays 1,
and the light control on (light control will be on) voltage can be
set; after the light control is set, the first digit displays 2, and
the light control off (light control lights will be off) voltage can
be set .

YN-C Buck series solar charge controller
14
Sealed
Lead acid
batteries
Field light up, battery type is lead acid type;
LiNiCoM-
n
Lithium
ternary
Field light up, battery type is ternary lithium battery;
LiFePO4
Lithium iron
phosphate
Field light up, battery type is lithium iron phosphate battery;
Custom
Customized
The field lights up and the number of series batteries can be
set customized.
ERROR
Alarm
Instructions
When there is a fault, the field will light up
4.4 Setup operation
4.4.1, General parameters view:
Press the Settings (set) button in standby mode, enter the parameter view settings
interface, and press the SET key to enter the U under→R under→ U over→R over
→Float→BCV→ECV→L-CON -V→Time→Time 1→Time 2→Bat-T-N,Check the process
with reference to the following figure, in any interface press (ESC) button exit settings
interface, back to the main menu interface, back to the standby interface;
Figure 4-3 General Parameters View
4.4.1. General parameter settings:
Press the setting (set) button in standby mode, enter the undervoltage setting
interface, the setting process refers to the following figure, press (ESC) button in any

YN-C Buck series solar charge controller
15
interface to exit the setting interface, return to the standby interface, other conventional
parameter settings are similar to the undervoltage setting;
Figure 4-4 General Parameter Settings - Under voltage Point Settings
4.4.3, Battery type settings

YN-C Buck series solar charge controller
16
Figure 4-5 Battery Type Settings
4.4.4、Combination button function settings:
1. Restore factory settings: Press the SET and DOWN buttons simultaneously for 3
seconds in standby mode, the system will restore the factory settings;
2. ID address modification: Press the SET and UP buttons simultaneously for 3
seconds in the standby state, and display the ID in the first two digits of the data in the
display area. Press the UP or DOWN button at this time. Set the system ID (address).
4.4.5、For the setting method of connecting the PC to PC or APP (WIFI or GPRS mode),
please refer to the corresponding PC manual and APP manual respectively;
Instruction
The PC host computer or APP (WIFI or GPRS mode) is an optional
accessory. The device can only use one mode for single
communication, and cannot use several communication modes at the
same time!
V. Device parameters
5.1 Protection function
table5- 1.Protection function reference table ：
Protection
function
instruction
PV over voltage
protection
When the PV array charging voltage exceeds the controller's rated input
voltage range, charging will stop.

YN-C Buck series solar charge controller
17
Battery polarity
reverse
connection
When the polarity of the battery is reversed, the controller will not
work and will not be damaged. After correcting the wiring error, re-open
the opportunity to continue normal operation.
Battery over
discharge
protection
When the battery voltage is lower than the set undervoltage value,
the discharge of the battery will be automatically stopped to prevent the
battery from being over-discharged and damaged.
Battery
overload
protection
When the controller output current is greater than the set value, the
load output will be automatically stopped to prevent the battery from
being over-discharged and damaged.
Battery over
volatge
protection
When the battery voltage reaches the overvoltage protection setting
value, the battery will be automatically stopped to prevent the battery
from being overcharged and damaged.
Night anti-
reverse
protection
At night, since the battery voltage is greater than the voltage of the
photovoltaic module, the automatic protection prevents the battery
voltage from being discharged through the photovoltaic module;
Equipment
overheat
protection
The controller has its own temperature sensor. When the
temperature is higher than the set value, the charging will stop. When the
temperature is lowered, it will automatically start to work.
High voltage
surge
This controller can only protect high-voltage surges with low energy.
In areas with frequent lightning, it is recommended to install an external
lightning arrester.
5.2 Troubleshooting
If the following symptoms occur, please check and troubleshoot as follows:
Table 5-2 Troubleshooting table
ERRO
R
Indicator
status and
alarm icon
possible reason
Solution
Array over
voltage
Red light,
UPVand
icon
flashes
More PV arrays in series
Disconnect the PV array, reduce the
number of PV arrays connected in series, and
ensure that the PV array open circuit voltage
does not exceed the set value in the “Table 3-
1 PV Electrical Parameters” table;
Battery
over
voltage
(overcharg
e)
Red light
on，Uover
and fla
shes
1. The controller
overvoltage protection
point is lower than the
highest charging range;
2. The battery is aging or
over-discharged;
3. The battery is over-
discharged;
4. Large dynamic
1. Reset the battery overvoltage protection
point through the device button or PC host
computer or APP;
2. The battery needs to be replaced after
aging;
3. Over-discharge requires manual setting of
battery voltage level;
4. Reduce large dynamic changes in load;

YN-C Buck series solar charge controller
18
changes in load;
Battery
under
voltage
(over
discharge)
Uunder
and
flashes
Battery voltage value is
lower than the
undervoltage protection
setting
1. Reduce or disconnect the load. If the alarm
is released, the battery voltage returns to
normal, indicating that the load power is too
large or the battery voltage and capacity are
low. It is easy to cause undervoltage
protection with heavy load;
2. Disconnect the load controller and still
alarm, the battery voltage does not return to
the over-discharge recovery setting value, and
the battery pack needs to be charged by PV or
other means, so that the fault can be released
after the battery pack voltage reaches the
recovery point set value.
The
indicator
light is off
and the
display is
not
displayed.
Battery voltage is lower than device startup
voltage
Heat sink
overheatin
g
Red light
on，
flashes
1. The ambient
temperature is too high,
the heat dissipation of
the equipment is poor,
and the fan is not well
ventilated; 2. The fan is
damaged.
1. Check the installation environment of the
equipment, remove the debris of the
equipment, and ensure that the fan is
ventilated smoothly; 2. The fan needs to be
replaced if it is damaged.
Charge
current
Red light
on，
Icharge
flashes
Charging overcurrent
protection check for
abnormal current
detection and
malfunction
If you restart it several times, if you can't solve
it, you need to go back to the factory for
repair;
Over
loading
Red light
on，Iload
and
flashes
Load power is too large
1. Reduce the load power;
2. Restart and release the fault;
3. Without excessive sensibility and capacitive
load;
Remark: The above fault phenomenon can not be turned on except the battery under voltage, other
faults can refer to the fault information through the PC background or mobile APP;