Epever XTRA Series User manual

MPPT Solar Charge Controller
User Manual
Models:
XTRA1206N/XTRA2206N
XTRA1210N/XTRA2210N
XTRA3210N/XTRA4210N
XTRA3215N/XTRA4215N
XTRA3415N/XTRA4415N

Important Safety Instructions
Please keep this manual for future review.
This manual contains all safety, installation, and operation instructions for the XTRA N series
Maximum Power Point Tracking (MPPT) controller ("controller" as referred to in this manual).
General Safety Information
Read all the instructions and warnings carefully in the manual before installation.
No user-serviceable components exist inside the controller. DO NOT disassemble or attempt
to repair the controller.
Mount the controller indoors. Avoid exposure to the components and do not allow water to
enter the controller.
Install the controller in a well-ventilated place. The controller’s heat sink may become very hot
during operation.
Suggest installing appropriate external fuses/breakers.
Disconnect all PV array connections and the battery fuse/breakers before controller
installation and adjustment.
Power connections must remain tight to avoid excessive heating from a loose connection.

CONTENTS
1 General Information 1
1.1 Overview 1
1.2 Characteristics 2
1.3 Naming Rules 3
1.4 Product Classification 3
2 Installation 5
2.1 Attentions 5
2.2 PV Array Requirements 5
2.3 Wire Size 7
2.4 Mounting 9
3 Display units 12
3.1 Basic Display unit(XDB1) 12
3.2 Standard Display unit (XDS1) 13
3.3 Adanced Display unit (XDS2) 17
4 Parameters Setting 22
4.1 Battery parameters 22
4.1.1 Supported battery types 22
4.1.2 Local setting 22
4.1.3 Remote Setting 26
4.2 Load modes 29
4.2.1 LCD setting 29
4.2.2 RS485 communication setting 31

5 Others 33
5.1 Protection 33
5.2 Troubleshooting 35
5.3 Maintenance 37
6 Technical Specifications 38
Annex I Conversion Efficiency Curves 42

1
1 General Information
1.1 Overview
XTRA N series controller, which can carry different display units (XDB1/XDS1/XDS2), adopts the
advanced MPPT control algorithm. It can minimize the maximum power point (MPP) loss rate and
time and quickly track the MPP to obtain the maximum energy under any conditions. It can also
increase the solar system's energy utilization ratio
Limiting the charging power & current and reducing charging power functions ensure the system is
stable with over PV modules in a high-temperature environment. IP33 Ingress protection and
isolated RS485 design improve the controller’s reliability and meet the different application
requirements.
XTRA N series controller owns a three-stage charging mode, which can effectively prolong the
battery's lifespan and significantly improve the system performance. Comprehensive electronic
protection of overcharge, over-discharge, PV & battery reverse polarity, etc., ensures the solar
system is more reliable and durable. This controller can be widely used for RV, household systems,
field monitoring, and many other applications.
Features：
CE certification(LVD EN/IEC62109,EMC EN61000-6-1/3)
100% charging and discharging in the working environment temperature range
Optional LCD units (XDB1/XDS1/XDS2)
High quality and low failure rate components of ST or IR to ensure the service life
Advanced MPPT technology & ultra-fast tracking speed guarantee the tracking efficiency of up
to 99.5%
Maximum DC/DC transfer efficiency is as high as 98.5%★; full load efficiency is up to 97.2%★
Advanced MPPT control algorithm to minimize the MPP lost rate and lost time
Accurate recognizing and tracking of multi-peaks maximum power point
Wide MPP operating voltage range

2
Support the lead-acid and lithium batteries; voltage parameters can be set on the controller
Programmable temperature compensation
Limit charging power & current over the rated value
Real-time energy statistics function
Power reduction automatically over-temperature value
Multiple load work modes
Comprehensive electronic protection
Isolated RS485 with 5V/200mA protected output for no power devices, with Modbus protocol
Support monitoring and setting the parameters via the APP or PC software
IP33▲Ingress protection
★XTRA4415N@48V system
For the BCV, FCV, LVD, and LVR, users can modify them on the local controller when the
battery type is "USE."
▲3-protection against solid objects: protected against solid objects over 2.5mm.
3-protected against sprays to 60°from the vertical.
1.2 Characteristics
Figure 1 Product Characteristics
❶
RTS★port
❺
RS485 communication port
❷
PV Terminals
❻
Terminal protection cover

3
❸
Battery Terminals
❼
Display units
❹
Load Terminals
❽
Mounting Hole Φ5mm
★If the temperature sensor is short-circuited or damaged, the controller will charge or
discharge according to the setting voltage at 25 ºC (no temperature compensation).
1.3 Naming Rules
XTRA 1 2 10 N - XDS2
Display Unit(XDB1/XDS1/XDS2)
Product Series
Charge & discharge current 1-10A;2-20A;3-30A;4-40A
System Voltage 1-12VDC; 2-12/24VDC
Max. PV open circuit voltage 10-100V;15-150V
Common Negative System
1.4 Product Classification
Classify
Model
Picture
Display
Basics
XTRA****N-XDB1
LED Indicators: PV & battery working
status
Button:
In manual work mode, it switches
ON/OFF the load by pressing the
button.
Clear the error information.
Standard
XTRA****N-XDS1
LED Indicators: PV & load working
status
Buttons: View or set the parameters
or clear the error information.
LCD：PV display:voltage/current
/generated energy
Battery display:
voltage/current/temperature
Load display:
current/consumed energy/load working
mode

4
Advanced
XTRA****N-XDS2
LED Indicators: PV & battery & load
working status
Buttons: View or set the parameters
or clear the error information.
LCD: PV display:voltage/current
/generated energy/power
Battery display:voltage/current/
temperature/capacity
Load display: voltage/current/power
/consumed energy/load working mode

5
2 Installation
2.1 Attentions
Please read the instructions to familiarize yourself with the installation steps before installation.
Be very careful when installing the batteries, especially flooded lead-acid batteries. Please wear
eye protection, and have fresh water available to wash and clean any contact with battery acid.
Keep the battery away from any metal objects, which may cause a short circuit of the battery.
Explosive battery gases may come out from the battery during charging, so make sure the
ventilation condition is good.
Ventilation is highly recommended if mounted in an enclosure. Never install the controller in a
sealed enclosure with flooded batteries! Battery fumes from vented batteries will corrode and
destroy the controller circuits.
Loose power connections and corroded wires may produce high heat that can melt wire
insulation, burn surrounding materials, or even cause a fire. Ensure tight connections, use cable
clamps to secure cables, and prevent them from swaying in mobile applications.
The controller can work with lead-acid and lithium batteries within its control scope.
The battery connection may be wired to one battery or a bank of batteries. The following
instructions refer to a singular battery. However, it is implied that the battery connection can be
made to either one battery or a group of batteries in a battery bank.
Multiple models of controllers can be installed in parallel on the same battery bank to achieve a
higher charging current. Each controller must have its solar module(s).
Select the system cables according to 5A/mm2or less current density following Article 690 of the
National Electrical Code, NFPA 70.
2.2 PV Array Requirements
Serial connection (string) of PV modules
As the core component of the solar system, the controller could be suitable for various types of PV
modules and maximize converting solar energy into electrical energy. According to the open-circuit

6
voltage (Voc) and the maximum power point voltage (VMpp) of the MPPT controller, the series
number of different types of PV modules can be calculated. The below table is for reference only.
XTRA1206N/2206N:
System
voltage
36 cell
Voc＜23V
48 cell Voc
＜31V
54 cell
Voc＜34V
60 cell
Voc＜38V
Max.
Best
Max.
Best
Max.
Best
Max.
Best
12V
2
2
1
1
1
1
1
1
24V
2
2
-
-
-
-
-
-
System
voltage
72 cell
Voc＜46V
96 cell
Voc＜62V
Thin-Film
Module
Voc＞80V
Max.
Best
Max.
Best
12V
1
1
-
-
-
24V
1
1
-
-
-
NOTE: The above parameter values are calculated under standard test conditions (STC (Standard
Test Condition): Irradiance 1000W/m2, Module Temperature 25℃, Air Mass1.5.)
XTRA1210/2210/3210/4210N:
System
voltage
36 cell
Voc＜23V
48 cell
Voc＜31V
54 cell
Voc＜34V
60 cell
Voc＜38V
Max.
Best
Max.
Best
Max.
Best
Max.
Best
12V
4
2
2
1
2
1
2
1
24V
4
3
2
2
2
2
2
2
System
voltage
72 cell
Voc＜46V
96 cell
Voc＜62V
Thin-Film
Module Voc
＞80V
Max.
Best
Max.
Best
12V
2
1
1
1
1
24V
2
1
1
1
1
NOTE: The above parameter values are calculated under standard test conditions (STC (Standard
Test Condition): Irradiance 1000W/m2, Module Temperature 25℃, Air Mass1.5.)
XTRA3215/4215N:
System
voltage
36 cell
Voc＜23V
48 cell
Voc＜31V
54 cell
Voc＜34V
60 cell
Voc＜38V
Max.
Best
Max.
Best
Max.
Best
Max.
Best
12V
4
2
2
1
2
1
2
1
24V
6
3
4
2
4
2
3
2

7
System
voltage
72 cell
Voc＜46V
96 cell
Voc＜62V
Thin-Film
Module Voc
＞80V
Max.
Best
Max.
Best
12V
2
1
1
1
1
24V
3
2
2
1
1
NOTE: The above parameter values are calculated under standard test conditions (STC (Standard
Test Condition): Irradiance 1000W/m2, Module Temperature 25℃, Air Mass1.5.)
XTRA3415/4415N:
System
voltage
36 cell
Voc＜23V
48 cell
Voc＜31V
54 cell
Voc＜34V
60 cell
Voc＜38V
Max.
Best
Max.
Best
Max.
Best
Max.
Best
12V
4
2
2
1
2
1
2
1
24V
6
3
4
2
4
2
3
2
48V
6
5
4
3
4
3
3
3
System
voltage
72 cell
Voc＜46V
96 cell
Voc＜62V
Thin-Film
Module Voc
＞80V
Max.
Best
Max.
Best
12V
2
1
1
1
1
24V
3
2
2
1
1
48V
3
2
2
2
1
NOTE: The above parameter values are calculated under standard test conditions (STC (Standard
Test Condition): Irradiance 1000W/m2, Module Temperature 25℃, Air Mass1.5.)
2.3 Wire Size
The wiring and installation methods must conform to national and local electrical code
requirements.
PV Wire Size
The PV array output varies with the PV module size, connection method, and sunlight angle. The
PV array's short circuit current(ISC) can calculate the minimum PV wire size. Please refer to the
value of Isc in the PV module specification. When PV modules are connected in series, the Isc
equals a PV module Isc. When PV modules are connected in parallel, the Isc equals the sum of the
PV modules’Isc. The Isc of the PV array must not exceed the controller’s maximum PV input
current. Please refer to the table below:
NOTE: All PV modules in a given array are assumed to be identical.

8
＊Isc=short circuit current(amps) Voc=open circuit voltage.
Model
Max. PV input current
Max. PV wire size＊
XTRA1206N
XTRA1210N
10A
4mm2/12AWG
XTRA2206N
XTRA2210N
20A
6mm2/10AWG
XTRA3210N
XTRA3215N
XTRA3415N
30A
10mm2/8AWG
XTRA4210N
XTRA4215N
XTRA4415N
40A
16mm2/6AWG
＊These are the maximum wire sizes that will fit the controller terminals.
CAUTION
When the PV modules are connected in series, the open-circuit voltage of the
PV array must not exceed 46V (XTRA**06N), 92V (XTRA**10N), 138V
(XTRA**15N) at 25℃environment temperature.
Battery and Load Wire Size
The battery and load wire size must conform to the rated current. The reference size is as below:
Model
Rated
charge
current
Rated
discharge
current
Battery wire size
Load wire
size
XTRA1206N
XTRA1210N
10A
10A
4mm2/12AWG
4mm2/12AWG
XTRA2206N
XTRA2210N
20A
20A
6mm2/10AWG
6mm2/10AWG
XTRA3210N
XTRA3215N
XTRA3415N
30A
30A
10mm2/8AWG
10mm2/8AWG
XTRA4210N
XTRA4215N
XTRA4415N
40A
40A
16mm2/6AWG
16mm2/6AWG
CAUTION
The wire size is only for reference. Suppose there is a long distance between
the PV array, the controller, and the battery. In that case, larger wires can be
used to reduce the voltage drop and improve performance.

9
The recommended battery wire is selected when the battery terminals are not
connected to any additional inverter.
2.4 Mounting
WARNING
Risk of explosion! Never install the controller in a sealed enclose with
flooded batteries! Do not install in a confined area where battery gas can
accumulate.
Risk of electric shock! When wiring the solar modules, the PV array can
produce a high open-circuit voltage, so disconnect the breaker before
wiring and be careful.
CAUTION
The controller requires at least 150mm of clearance above and below for
proper airflow. Ventilation is highly recommended if mounted in an enclosure.
Installation Procedure:
Figure 2-1 Mounting
Step 1: Determination of the installation location and heat-dissipation space
The controller shall be installed in a place with sufficient airflow through the controller radiators and
a minimum clearance of 150 mm from the upper and lower edges of the controller to ensure natural
thermal convection. See Figure 2-1: Mounting
CAUTION
Suppose the controller is to be installed in an enclosed box. In that case,
ensuring reliable heat dissipation through the box is important.

10
Figure 2-2 Schematic of wiring diagram
Step 2：Connect the system in the order of ❶battery ❷load❸PV array by Figure 2-2,”
Schematic Wiring Diagram” and disconnect the system in the reverse order❸❷❶.
CAUTION
While wiring the controller, do not connect the circuit breaker or fuse and
ensure that the electrode polarity is correctly connected.
Afuse whose current is 1.25 to 2 times the rated current of the controller must
be installed on the battery side with a distance from the battery not greater
than 150 mm.
Suppose the controller is to be used in an area with frequent lightning strikes
or an unattended area. In that case, it must install an external surge arrester.
Suppose an inverter is to be connected to the system. In that case, you must
connect the inverter directly to the battery, not to the load side of the
controller.
Step 3：Grounding
XTRA N series are common-negative controllers; all the negative terminals can be grounded
simultaneously, or anyone is grounded. However, according to the practical application, the
negative terminals of the PV array, battery, and load can also be ungrounded. Still, the grounding
terminal on the shell must be grounded. It effectively shields the electromagnetic interference from
the outside and prevents some electric shock to the human body.
A common-negative controller for a common-negative system, such as the
motorhome, is recommended.

11
CAUTION
The controller may be damaged if a common-positive controller is used and the
positive electrode is grounded in the common-negative system.
Step 4：Connect accessories
Connect the remote temperature sensor cable
（Model:RT-MF58R47K3.81A） （Model:RTS300R47K3.81A）
Connect the remote temperature sensor cable to the interface ①and place the other end close to
the battery.
CAUTION
Suppose the remote temperature sensor is not connected to the controller. In
that case, the default battery charging or discharging temperature setting is
25 °C without temperature compensation.
Connect the accessories for RS485 communication
Refer to chaper4 “Control Parameters Setting.”
Step 5：Powered on the controller
Connect the battery fuse to power the controller. Then check the battery indicator's status (the
controller operates normally when the indicator is lit in green). Connect the fuse and circuit breaker
of the load and PV array. Then the system will be operating in preprogrammed mode.
CAUTION
If the controller is not operating properly or the battery indicator on the controller
shows an abnormality, please refer to 5.2 “Troubleshooting.”
Temperature Sensor
Remote Temperature Sensor
Cable (Optional)

12
3 Display units
3.1 Basic Display unit(XDB1)
(1) Charging and battery LED indicator
Indicator
Color
Status
Information
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
Green
Fast flashing (4Hz)
PV Over voltage
Green
On Solid
Normal
Green
Slowly flashing (1Hz)
Full
Green
Fast flashing (4Hz)
Over voltage
Orange
On Solid
Under voltage
Red
On Solid
Over discharged
Red
Slowly Flashing(1Hz)
Battery Overheating
Lithium battery Low temperature①
All LED indicators fast flashing at the same time
System voltage error②
Controller Overheating
①When a lead-acid battery is used, the controller doesn’t have low-temperature protection.
②When a lithium battery is used, the system voltage can’t be identified automatically.
(2) Battery Capacity Level Indicator

13
Battery Capacity Level (BCL)
Indicator
Color
Status
Information
☆○○○
Green
25% Indicators slowly flashing
0< BCL <25%
●☆○○
Green
50% Indicators slowly flashing
25% Indicators are ON
25%≤BCL <50%
●●☆○
Green
75% Indicators slowly flashing
25%,50% Indicators are ON
50%≤BCL <75%
●●●☆
Green
100% Indicators slowly flashing
25%,50%,75% Indicators are ON
75%≤BCL <100%
●●●●
Green
25%,50%,75%,100% Indicators are ON
100%
“○” Indicator is OFF；“●” Indicator is on Solid；“☆” Indicator is slowly flashing.
Load status
Battery Capacity Level
Green
on solid
The load is ON
Green
OFF
The load is OFF
(3) Button
In the manual mode, it can control the On/Off of the load via the button
3.2 Standard Display unit (XDS1)
(1) LED indicator
Indicator
Color
Status
Instruction
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
Green
Fast Flashing (4Hz)
PV Over voltage
Red
On Solid
Load ON
Red
OFF
Load OFF

14
(2) Button
Mode
Note
Load ON/OFF
It can turn the load On/off in manual load mode via the button.
Clear Fault
Press the button
Browsing
Mode
Press the button
Setting Mode
Press the button and hold on 5s to enter the setting mode
Press the button to set the parameters,
Press the button to confirm the setting parameters or no operation for
10s. It will exit the setting interface automatically.
(3) Interface
Note: The display screen can be viewed clearly when the angle between the end-users
horizontal sight and the display screen is within 90°. If the angle exceeds 90°, the
information on the display screen cannot be viewed clearly.
1) Status Description
Item
Icon
Status
PV array
Day
Night
No charging
Charging
PV Voltage, Current, Generated energy
Battery
Battery capacity, In Charging
Battery Voltage, Current, Temperature
Battery Type
Load
Load ON