Epever MSC-N Series User manual

User Manual
MSC2210N
MSC3210N
MSC4210N
MSC4215N
MPPT Solar Charge Controller

Contents
Important Safety Instructions 1
1 General Information 4
1.1 Overview 4
1.2 Appearance 6
1.3 Naming rules 7
1.4 Connection diagram 8
1.4.1 Battery mode 8
1.4.2 No-battery mode 8
2 Interface 10
2.1 Indicator 10
2.2 Button 11
2.3 Battery type 12
2.4 Battery voltage control parameters 12
2.5 Load output voltage and priority setting 15
2.6 Load operation mode 16
3 Installation 18
3.1 Attentions 18
3.2 PV requirements 18
3.3 Wire size 20
3.4 Mounting 21
4 Others 25
4.1 Protection 25
4.2 Troubleshooting 27

4.3 Maintenance 29
5 Specifications 30
Annex I PV Conversion Efficiency Curves 34
Annex 2 Load Conversion Efficiency Curves 37

1
Important Safety Instructions
Please reserve this manual for future review.
This manual contains all safety, installation, and operation instructions for the MSC-N
series Security Monitoring Maximum Power Point Tracking (MPPT) solar controller
("controller" as referred to in this manual).
1. Explanation of symbols
Please read related literature accompanying symbols to enable users to use
the product efficiently and ensure personal and property safety.
Symbol
Definition
TIP
Indicate any practical advice for reference.
IMPORTANT: Indicates a critical tip during the operation, if ignored,
may cause the device to run in error.
CAUTION: Indicates potential hazards that may cause the device to
be damaged if not avoided.
WARNING: Indicates the danger of electric shock, if not avoided,
would cause casualties.
WARNING HOT SURFACE: Indicates the risk of high temperature, if
not avoided, would cause scalds.
Read the user manual carefully before any operation.
WARNING
The entire system should be installed by professional and technical
personnel.
2. Requirements for professional and technical personnel
Professionally trained；
Familiar with related safety specifications for the electrical system;
Read this manual carefully and master related safety cautions.
3. Professional and technical personnel is allowed to do

2
Install the controller to a specified location;
Conduct trial operations for the controller;
Operate and maintain the controller
4. Safety cautions before installation
IMPORTANT
When you receive the controller, check whether any damage
occurred in transportation. Contact the transportation company
or our company in time for any problem.
CAUTION
When storing or moving the controller, follow the instructions in
the manual.
When installing the controller, evaluate whether the operation
area has any arc danger.
WARNING
Keep the controller out of reach of children.
5. Safety cautions for mechanical installation
WARNING
Before installation, make sure the controller has no electrical
connection.
Ensure enough heat dissipation space for the controller before
installation. Do not install the controller in a harsh environment
such as humid, greasy, flammable, explosive, or dust
accumulation.
6. Safety cautions for electrical connection
CAUTION
Check whether all the wiring connections are tight to avoid the
danger of heat accumulation due to loose connections.
WARNING
The PV input is a high voltage, do not touch the wiring connection
to avoid electric shock.
7. Safety cautions for controller operation:
CAUTION
When the controller is running, please do not open the cabinet.
When the controller runs, the heat sink will generate heat, and the
temperature will be very high; please do not touch it.

3
WARNING
HOT
SURFACE
8. Dangerous operations which would cause an electric arc, fire, or explosion
Touch the wire end that hasn't been insulation treated and may be electriferous.
Touch the wiring copper row, terminals, or internal modules of the controller that
may be electriferous.
Screw or other spare parts inadvertently falls into the controller.
Improper operations are taken by untrained non-professional personnel.
WARNING
Once an accident occurs, it must be handled by professional and
technical personnel. Improper operations would cause more
serious accidents.
9. Safety cautions for stopping the controller
After the controller stop running for five minutes, the internal conductive modules
can be touched;
The controller is allowed to restart after removing the faults affecting the
controller's safety performance.
There are no serviceable parts inside. If any maintenance service is required,
please contact our service personnel.
10. Safety cautions for controller maintenance
It is recommended to check the controller with testing equipment to ensure there
is no voltage and current at all;
When conducting electrical connection and maintenance, must post temporary
warning signs or put up barriers to prevent unrelated personnel from entering the
electrical connection or maintenance area;
An improper operation of the controller may cause personal injury or equipment
damage;
To prevent electrostatic damage, please wear an antistatic wrist strap or avoid
unnecessary contact with the circuit board.

4
1 General Information
1.1 Overview
MSC-N series is a new generation of solar controllers with a two-way load output. An
enable switch allows the two-way load output voltage to switch to 12V or 24V DC.
According to the battery voltage, the two-way load output voltage can be turned off in
stages to ensure the main load output. The two-way load output adopts a high-
efficiency buck-boost conversion circuit, which greatly reduces the battery's invalid
loss and improves the battery's service time.
The MPPT charging technology can fast track the max power point of solar panels in
any situation and obtain the maximum energy in real-time. It can increase the
utilization ratio of solar energy by 20%-30% compared with the PWM charging
method. Charging current limit, charging power limit, and high temperature charging
automatic power reduction fully ensure the system stability of access to excess PV
modules and high temperature running. Adaptive three-stage charging mode and
comprehensive electronic protections such as over-charge, over-discharge, PV &
battery reverse polarity, etc., effectively ensure the power supply is safer, more
stable, and more durable. MSC-N series controllers are most suitable for applications
in the field of security monitoring, RV, household system, etc.
Features
High quality and low failure rate components of ST or IR to ensure the service
life
Advanced MPPT technology & ultra-fast tracking speed guarantee tracking
efficiency up to 99.5%
Maximum DC/DC transfer efficiency up to 98.6%, full load efficiency up to
96.6 %

5
Accurate recognizing and tracking technology of multi-peaks maximum power
point
Wider MPP running voltage to increase the utilization ratio of PV modules
Support the lead-acid and lithium batteries, programmable temperature
compensation
High temperature charging automatic power reduction function
The freely set voltage level of the two-way load output especially suitable for
voltage-sensitive loads
Configurable cut-off voltage value for the two-way load output
Support no-battery mode, PV array powers the load directly ①
High-efficiency buck-boost control chip and power device, conversion efficiency
up to 98.9%
Optional charging prior mode and load prior mode
Effectively prolong the running time of load one by the discontinuous power
supply in load prior mode
Customized the load two output according to the actual requirement
Common negative design, used in a negative grounded system
Real-time monitor controller by an external remote meter, BT module, Wifi
module, or PC software
Comprehensive electronic protections
①Set the rated voltage level of the battery to auto recognition mode through the PC
software or the remote meter, and the controller will be in no-battery mode.

6
1.2 Appearance
①
Power Indicator
⑨
Load 2 Terminals
②
Load 1 indicator
⑩
Grounding terminal
③
Load 2 indicator
⑪
Temperature sensor
interface②
④
Error codes
⑫
PV Terminals
⑤
Load ON/OFF and setting
button
⑬
Battery Terminals
⑥
Load 1/Load 2/Prior Mode
enable switch
⑭
Mounting Hole *4
⑦
RS485 communication port①
⑮
Battery indicator
⑧
Load 1 Terminals
⑯
PV Indicator
①Pin definition for the RS485 communication port

7
RJ45 crystal head
WARNING
Do not short circuit the positive and negative pins of the RS485
communication port; otherwise, it will damage the controller.
②If the remote temperature sensor is not connected to the controller or
damaged, the controller will charge or discharge the battery at the default
temperature setting of 25℃(no temperature compensation).
1.3 Naming rules
①For MSC4210N and MSC4215N, the rated voltage of the battery supports 24V only. For
other MSC-N types, the battery's rated voltage supports 12V and 24V.
Pin
Definition
Instruction
1/2
+5VDC
5V/200mA
3/4
RS485-B
RS485-B
5/6
RS485-A
RS485-A
7/8
GND
Power GND

8
1.4 Connection diagram
1.4.1 Battery mode
1.4.2 No-battery mode
The PV array will provide power for the load in the no-battery mode. The operating
processes of setting the no-battery way by the controller button are shown below:
Step1: Press the controller button for 5s until the indicator blinks orange
slowly. Enter the battery type setting mode.
Step2: Click the controller button to switch the battery type to "24V Sealed" the
indicator blinks green slowly.
Step3: Press the controller button for 5s to confirm.
Step4: Switch the "Prior Mode enable switch" to the "LPM" side.
Then the controller enters the no-battery mode, with no output at the battery side.
CAUTION
Only when the PV power goes greater than the total load power,
which cannot surge drastically, and the PV input voltage exceeds

9
30V, will the load work normally.
In the condition of a two-way load, when the power of the PV array
is lower than the total power of the loads but can meet the power
of load 2, the output of load 2 is given priority. Load 1 will be turned
off and restarted every 30 minutes until it can work normally.

10
2 Interface
2.1 Indicator
Indicator
Color
Status
Definition
Green
ON solid
PV charges the battery with a low
current
Green
OFF
1. No sunlight
2. Connection error
3. Low PV voltage
Green
Slowly
Flashing(1Hz)
Normal charging
Red
Fast Flashing
(4Hz)
PV over voltage
Green
ON solid
Battery normal
Green
Slowly
Flashing(1Hz)
Battery full
Green
Fast Flashing
(4Hz)
Battery over voltage
Orange
ON solid
Battery under voltage
Orange
Slowly
Flashing
Battery type set

11
Red
ON solid
Battery over discharged
Red
Slowly
Flashing(1Hz)
Battery over temperature
Red
Fast Flashing
(4Hz)
Lithium battery low temperature①
Green
ON solid
Controller normal
Battery type: 12V Sealed
Slowly
Flashing
Battery type: 24V Sealed
Green
ON solid
Load 1 ON
Battery type: 12V Gel
Slowly
Flashing
Battery type: 24V Gel
Green
ON solid
Load 2 ON
Battery type: 12V LFP
Slowly
Flashing
Battery type: 24V LFP
Red
ON solid
Controller over temperature/fault
Load over current/short circuit
Battery type: 12V LNCM
Slowly
Flashing
Battery type: 24V LNCM
All Indicators keep ON solid
Battery type: User
All Indicators fast flashing
System voltage error②
①When a lead-acid battery is used, the controller doesn't have low-temperature protection.
②When a lithium-ion battery is used, the system voltage can't be identified automatically.
2.2 Button
Click
1. Control the load ON/OFF
First: Load 1 OFF, Second: Load 2 OFF;
Third: Load 1 ON; Forth: Load 2 ON.
2 Select battery type （refer to "2.1 Indicator")

12
Press for 5s
Enter the Battery type setting interface
2.3 Battery type
①Supported battery types
1
Lead-acid
battery
Sealed (default, 12V Sealed/24V Sealed)
Gel (12V Gel/24V Gel)
2
Lithium
battery
LiFePO4 (12V LFP/24V LFP)
Li(NiCoMn)O2 (12V LNCM/24V LNCM)
3
User
②Setting the battery type by the controller button
Step1: Press the controller button for 5s until the indicator blinks orange
slowly. Enter the battery type setting mode.
Step2: Click the controller button to switch the battery type. The battery type is
cycled in the following sequence:
“12V Sealed →12V Gel →12V LFP →12V LNCM →24V Sealed →24V Gel
→24V LFP →24V LNCM →User →12V Sealed →……”.
Distinguish the battery type by observing the indicators' status.
Step3: Press the controller button for 5s to confirm.
2.4 Battery voltage control parameters
Set the battery type as "User" by the controller button, remote meter, or the PC
software. Then the voltage control parameters can be modified.
Battery parameters
Below values are measured in the 12V/25 ºC system; please double the values in the
24V system.

13
Battery type
Voltage
parameters
Sealed
GEL
User
Over Voltage
Disconnect Voltage
16.0V
16.0V
9~17V
Charging Limit
Voltage
15.0V
15.0V
9~17V
Over Voltage
Reconnect Voltage
15.0V
15.0V
9~17V
Equalize Charging
Voltage
14.6V
--
9~17V
Boost Charging
Voltage
14.4V
14.2V
9~17V
Float Charging
Voltage
13.8V
13.8V
9~17V
Boost Reconnect
Charging Voltage
13.2V
13.2V
9~17V
VLVR （Low voltage
reconnect voltage）
12.6V
12.6V
9~17V
Under Voltage
Warning Reconnect
Voltage
12.2V
12.2V
9~17V
Under Voltage
Warning Voltage
12.0V
12.0V
9~17V
VLVD （Low Voltage
Disconnect Voltage）
11.1V
11.1V
9~17V
Discharging Limit
Voltage
10.6V
10.6V
9~17V
Equalize Duration
120 minutes
--
0～180 minutes
Boost Duration
120 minutes
120 minutes
10～180 minutes
The following rules must be observed when modifying the parameter values
in User for a lead-acid battery.
A．Over Voltage Disconnect Voltage > Charging Limit Voltage ≥ Equalize Charging
Voltage ≥ Boost Charging Voltage ≥ Float Charging Voltage > Boost Reconnect

14
Charging Voltage.
B．Over Voltage Disconnect Voltage > Over Voltage Reconnect Voltage
C．Low Voltage Reconnect Voltage > Low Voltage Disconnect Voltage ≥ Discharging Limit
Voltage.
D．Under Voltage Warning Reconnect Voltage>Under Voltage Warning Voltage≥ Discharging
Limit Voltage;
E．Boost Reconnect Charging voltage >Low Voltage Reconnect Voltage.
Lithium battery parameters
Below values are measured in the 12V/25 ºC system; please double the values in the
24V system.
Battery type
Voltage control
parameters
LFP
Li(NiCoMn)O2
User
Over Voltage Disconnect
Voltage
15.6V
13.5V
9~17V
Charging Limit Voltage
14.6V
12.6V
9~17V
Over Voltage Reconnect
Voltage
14.7V
12.7V
9~17V
Equalize Charging Voltage
14.5V
12.5V
9~17V
Boost Charging Voltage
14.5V
12.5V
9~17V
Float Charging Voltage
13.8V
12.2V
9~17V
Boost Reconnect Charging
Voltage
13.2V
12.1V
9~17V
VLVR （Low voltage
reconnect voltage）
12.8V
10.5V
9~17V
Under Voltage Warning
Reconnect Voltage
12.8V
11.0V
9~17V
Under Voltage Warning
Voltage
12.0V
10.5V
9~17V
VLVD （Low Voltage
Disconnect Voltage）
11.1V
9.3V
9~17V
Discharging Limit Voltage
10.6V
9.3V
9~17V
The following rules must be followed when modifying the parameter values
in User for a lithium battery.

15
A．Over Voltage Disconnect Voltage>Over Charging Protection Voltage(Protection
Circuit Modules(BMS))+0.2V;
B．Over Voltage Disconnect Voltage>Over Voltage Reconnect Voltage＝Charging
Limit Voltage ≥ Equalize Charging Voltage ＝Boost Charging Voltage ≥ Float
Charging Voltage>Boost Reconnect Charging Voltage;
C．Low Voltage Reconnect Voltage > Low Voltage Disconnect Voltage ≥ Discharging
Limit Voltage.
D．Under Voltage Warning Reconnect Voltage>Under Voltage Warning Voltage≥
Discharging Limit Voltage;
E．Boost Reconnect Charging voltage> Low Voltage Reconnect Voltage;
F．Low Voltage Disconnect Voltage ≥ Over Discharging Protection Voltage
(BMS)+0.2V
WARNING
The voltage parameters of a lithium battery can be set according
to the voltage parameters of the lithium battery BMS.
The required accuracy of BMS shall be no higher than 0.2V. We
will not assume any responsibility for the system abnormal when
the accuracy of BMS is higher than 0.2 v.
2.5 Load output voltage and priority setting
L2
Load 2
Output voltage
Set to OFF
Output 12V
Set to ON
Output 24V
L1
Load 1
Set to OFF
Output 12V

16
Output voltage
Set to ON
Output 24V
CPM/LPM
Load working
Modes
(only valid for load
2)
Set to OFF
CPM(Charging Prior Mode)
(Default)
Set to ON
LPM(Load prior mode①)
①The load prior mode will be enabled when the battery voltage reaches the low voltage
disconnect voltage and the PV array charging current reaches more than 7A for 10
minutes.
WARNING
Before connecting loads, ensure the voltage level of the load is
equal to the output voltage level corresponding to the DIP switch.
The load may be damaged if the output voltage level is higher than
the load voltage.
2.6 Load operation mode
Load
Working
modes
Definition
Load 1
Manual
mode(Default
load ON)
The load output will be turned off when the battery
voltage reaches the Under Voltage Warning Voltage
(UVW).
The load output will resume when the battery voltage
reaches the Under Voltage Warning Reconnect
Voltage (UVR).
Load 2
Manual
mode(Default
load ON)
Set enable switch to CPM(default)
The load output will be turned off when the battery
voltage reaches the Low Voltage Disconnect Voltage
(LVD).
The load output will resume when the battery voltage
reaches the Low Voltage Reconnect Voltage (LVR).
Set the enable switch to LPM①
Mode 1: The load output will discontinue when the
battery voltage reaches the Low Voltage Disconnect
Voltage and the PV array's charging current reaches
more than 7A for 10 minutes. It will be turned on for