Epever XTRA N Series User manual

XTRA N Series
——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 instructions of safety, installation and operation for XTRA N
series Maximum Power Point Tracking (MPPT) controller ("the controller" as referred
to in this manual).
General Safety Information
Read carefully all the instructions and warnings in the manual before installation.
No user serviceable components inside the controller. DO NOT disassemble or
attempt to repair the controller.
Mount the controller indoors. Avoid exposure 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.
Make sure to switch off all PV array connections and the battery fuse/breakers
before controller installation and adjustment.
Power connections must remain tight to avoid excessive heating from loose
connection.

CONTENTS
1. General Information........................................................................1
1.1 Overview.............................................. 1
1.2 Characteristics......................................... 2
1.3 Naming Rules of Controller models ....................... 3
1.4 Product Classification................................... 3
2. Installation Instructions .................................................................4
2.1 General Installation Notes ............................... 4
2.2 PV Array Requirements ................................. 4
2.3 Wire Size ............................................. 8
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. Control Parameters Setting .........................................................23
4.1 Battery types ......................................... 23
4.1.1 Support battery types ............................. 23
4.1.2 Battery Voltage Control Parameters................. 23
4.1.3Settings ......................................... 25
4.2 Load working modes................................... 26
4.2.1LCD setting ...................................... 26
4.2.2R485 communication setting ....................... 27
4.3 Accessories (optional) ................................. 30
5. Protections, Troubleshooting and Maintenance........................32
5.1 Protection............................................ 32
5.2 Troubleshooting....................................... 33
5.3 Maintenance ......................................... 34
6. Technical Specifications..............................................................36
Annex I Conversion Efficiency Curves...........................................39
Annex II Mechanical Dimension Diagram.......................................51

1
1. General Information
1.1 Overview
XTRA N series controller which can carry different display units(XDB1/XDS1/XDS2)
adopt the advanced MPPT control algorithm, it can minimize the maximum power
point loss rate and loss time, quickly track the maximum power point(MPP) of the PV
array and obtain the maximum energy from solar array under any conditions; and it
can increase the ratio of energy utilization in the solar system by 20%-30% compared
with PWM charging method.
Limiting the charging power & current and reducing charging power functions ensure
the system stable with over PV modules in high temperature environment. IP32
Ingress protection and isolated RS485 design further improve the controller’s
reliability and meet the different application requirements.
XTRA N series controller owns self-adaptive three-stage charging mode based on
digital control circuit, which can effectively prolong the lifespan of battery and
significantly improve the system performance. It also has comprehensive electronic
protection for overcharge, overdischarge, PV & battery reverse polarity etc, to ensure
the solar system more reliable and more durable. This controller can be widely used
for RV, household system, field monitoring and many other applications.
Features：
CE certification(LVD EN/IEC62109,EMC EN61000-6-1/3)
100% charging and discharging in working environment temperature range
Optional LCD display units (XDB1/XDS1/XDS2)
High quality and low failure rate components of ST or IR to ensure service life
Advanced MPPT technology & ultra-fast tracking speed guarantee tracking
efficiency up to 99.5%
Maximum DC/DC transfer efficiency is as high as 98.3%★, full load efficiency is up
to 97.3%★
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
Support the lead-acid and lithium batteries, programmable temperature compensation
Limit charging power & current over 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

2
Modbus protocol
Support monitoring and setting the parameters via APP or PC software
IP32▲Ingress protection
★XTRA3415N@48V system
▲3-protection against solid objects: protected against solids objects over
2.5mm.
2-protection against liquids: protected against direct sprays up to 15°from the
vertical.
1.2 Characteristics
❶
RTS★port
❺
RS485 communication port
❷
PV Terminals
❻
Terminal protection cover
❸
Battery Terminals
❼
Display units
❹
Load Terminals
❽
Mounting Hole Φ5mm
★If the temperature sensor is short circuit or damaged, the controller will
charge or discharge according the voltage setting point at the default
temperature setting of 25 ºC(no temperature compensation).
Figure 1 Product Characteristics

3
1.3 Naming Rules of Controller models
EXAMPLE:
1.4Product Classification
Classify
Model
Picture
Display
Basics
XTRA****N-XDB1
LED Indicators: PV & battery
working status
Button:
In manual work mode, it switch
ON/OFF the load by press 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
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
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

4
2. Installation Instructions
2.1 General Installation Notes
Please read the entire installation instructions to get familiar with the installation
steps before installation.
Be very careful when installing the batteries, especially flooded lead-acid battery.
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 short circuit of the
battery.
Explosive battery gases may come out from the battery during charging, so make
sure 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 result in high heat that can melt
wire insulation, burn surrounding materials, or even cause fire. Ensure tight
connections and use cable clamps to secure cables and prevent them from swaying
in mobile applications.
The controller can work with lead-acid battery and lithium battery within its control
scope.
Battery connection may be wired to one battery or a bank of batteries. The following
instructions refer to a singular battery, but it is implied that the battery connection
can be made to either one battery or a group of batteries in a battery bank.
Multiple same models of controllers can be installed in parallel on the same battery
bank to achieve higher charging current. Each controller must have its own solar
module(s).
Select the system cables according to 5A/mm2or less current density in accordance
with Article 690 of the National Electrical Code, NFPA 70.
2.2 PV Array Requirements
(1) Serial connection (string) of PV modules
As the core component of solar system, controller could be suitable for various types
of PV modules and maximize converting solar energy into electrical energy. According
to the open circuit voltage (Voc) and the maximum power point voltage (VMpp) of the
MPPT controller, the series number of different types PV modules can be calculated.
The below table is for reference only.

5
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
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

6
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) Maximum PV array power
The MPPT controller has the function of charging current/power-limiting, that is,
during the charging process, when the charging current or power exceeds the rated
charging current or power, the controller will automatically limit the charging current or
power to the rated range, which can effectively protect the charging parts of controller,
and prevent damages to the controller due to the connection of some
over-specification PV modules. The actual operation of PV array is as follows:
Condition 1:
Actual charging power of PV array ≤Rated charging power of controller
Condition 2:
Actual charging current of PV array ≤Rated charging current of controller
When the controller operates under “Condition 1”or“Condition 2”, it will carry out the
charging as per the actual current or power; at this time, the controller can work at the
maximum power point of PV array.
WARNING: When the power of PV is not greater than the rated charging
power, but the maximum open-circuit voltage of PV array is more than
60V(XTRA**06N)/100V(XTRA**10N)/150V(XTRA**15N) (at the lowest
environmental temperature), the controller may be damaged.
Condition 3:
Actual charging power of PV array＞Rated charging power of controller
Condition 4:
Actual charging current of PV array＞Rated charging current of controller

7
When the controller operates under “Condition 3”or“Condition 4”，it will carry out the
charging as per the rated current or power.
WARNING: When the power of PV module is greater than the rated
charging power, and the maximum open-circuit voltage of PV array is more
than 60V(XTRA**06N)/100V(XTRA**10N)/150V(XTRA**15N) (at the
lowest environmental temperature), the controller may be damaged.
According to “Peak Sun Hours diagram”, if the power of PV array exceeds the rated
charging power of controller, then the charging time as per the rated power will be
prolonged, so that more energy can be obtained for charging the battery. However, in
the practical application, the maximum power of PV array shall be not greater than 1.5
x the rated charging power of controller. If the maximum power of PV array exceeds
the rated charging power of controller too much, it will not only cause the waste of PV
modules, but also increase the open-circuit voltage of PV array due to the influence of
environmental temperature, which may make the probability of damage to the
controller rise. Therefore, it is very important to configure the system reasonably. For
the recommended maximum power of PV array for this controller, please refer to the
table below:
Model
Rated Charge
Current
Rated Charge
Power
Max. PV Array
Power
Max. PV open
circuit voltage
XTRA1206N
10A
130W/12V
260W/24V
195W/12V
390W/24V
46V①
60V②
XTRA2206N
20A
260W/12V
520W/24V
390W/12V
780W/24V
XTRA1210N
10A
130W/12V
260W/24V
195W/12V
390W/24V
92V①
100V②
XTRA2210N
20A
260W/12V
520W/24V
390W/12V
780W/24V
XTRA3210N
30A
390W/12V
780W/24V
580W/12V
1170W/24V
XTRA4210N
40A
520W/12V
1040W/24V
780W/12V
1560W/24V
XTRA3215N
30A
390W/12V
780W/24V
580W/12V
1170W/24V
138V①
150V②
XTRA4215N
40A
520W/12V
1040W/24V
780W/12V
1560W/24V
XTRA3415N
30A
390W/12V
780W/24V
1170W/36V
1560W/48V
580W/12V
1170W/24V
1755W/36V
2340W/48V
XTRA4415N
40A
520W/12V
1040W/24V
1560W/36V
2080W/48V
780W/12V
1560W/24V
2340W/36V
3120W/48V
①At 25℃environment temperature
②At minimum operating environment temperature

8
2.3 Wire Size
The wiring and installation methods must conform to all national and local electrical
code requirements.
PV Wire Size
Since PV array output can vary due to the PV module size, connection method or
sunlight angle, the minimum wire size can be calculated by the Isc＊of PV array.
Please refer to the value of Isc in the PV module specification. When PV modules
connect in series, the Isc is equal to a PV modules Isc. When PV modules connect in
parallel, the Isc is equal to 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
as below:
NOTE: All PV modules in a given array are assumed to be identical.
＊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 connect 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
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

9
XTRA4210N
XTRA4215N
XTRA4415N
40A
40A
16mm2/6AWG
16mm2/6AWG
CAUTION: The wire size is only for reference. If there is a long distance
between the PV array and the controller or between the controller and the
battery, larger wires can be used to reduce the voltage drop and improve
performance.
CAUTION: For the battery, the recommended wire will be selected
according to the conditions that its 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.
WARNING: Risk of electric shock! When wiring the solarmodules, the PV
array can produce a high open circuit voltage, so turn off the breaker before
wiring and be careful when wiring.
CAUTION：The controller requires at least 150mm of clearance above and
below for proper air flow. Ventilation is highly recommended if mounted in an
enclosure.
Installation Procedure:
Step 1: Determination of Installation Location and Heat-dissipation Space
Figure 2-1 Mounting

10
Determination of installation location: The controller shall be installed in a place with
sufficient air flow through the radiators of the controller and a minimum clearance of
150 mm from the upper and lower edges of the controller to ensure natural thermal
convection. Please see Figure 2-1: Mounting
CAUTION: If the controller is to be installed in an enclosed box, it is
important to ensure reliable heat dissipation through the box.
Step 2：Connect the system in the order of ❶battery ❷load❸PV array in
accordance with Figure 2-2,”Schematic Wiring Diagram” and disconnect the system in
the reverse order❸❷❶.
CAUTION: While wiring the controller do not close the circuit breaker or
fuse and make sure that the leads of "+" and "-" poles are connected
correctly.
CAUTION: A fuse which 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.
CAUTION: If the controller is to be used in an area with frequent lightning
strikes or unattended area, it must install an external surge arrester.
CAUTION: If an inverter is to be connected to the system, connect the
inverter directly to the battery, not to the load side of the controller.
Step 3：Grounding
XTRA N series is a common-negative controller, where all the negative terminals of
PV array, battery and load can be grounded simultaneously or any one of them will be
Figure 2-2 Schematic of wiring diagram

11
grounded. However, according to the practical application, all the negative terminals
of PV array, battery and load can also be ungrounded, but the grounding terminal on
its shell must be grounded, which may effectively shield the electromagnetic
interference from the outside, and prevent some electric shock to human body due to
the electrification of the shell.
CAUTION: For common-negative system, such as motorhome, it is
recommended to use a common-negative controller; but if in the
common-negative system, some common-positive equipment are used,
and the positive electrode is grounded, the controller may be damaged.
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: If the remote temperature sensor is not connected to the
controller,, the default setting for battery charging or discharging
temperature is 25 °C without temperature compensation.
Connect the accessories for RS485 communication
Refer to chaper4 “Control Parameters Setting”.
Step 5：Powered on the controller
Closing the battery fuse will switch on the controller. Then check the status of the
battery indicator (the controller is operating normally when the indicator is lit in green).
Close the fuse and circuit breaker of the load and PV array. Then the system will be
operating in the 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 connection normal ,but
low voltage(low irradiance)
from PV, no charging
Green
OFF
No PV voltage(night time) or
PV connection problem
Green
Slowly Flashing(1Hz)
In 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 the low temperature
protection.
②When a lithium battery is used, the system voltage can’t be identified automatically.

13
(2)Battery Capacity Level Indicator
Battery Capacity Level (BCL)
Indicator
Color
Status
Information
☆○○○
Green
25% Indicator slowly flashing
0< BCL <25%
●☆○○
Green
50% Indicator slowly flashing
25% Indicator on solid
25%≤BCL <50%
●●☆○
Green
75% Indicator slowly flashing
25%,50% Indicators on solid
50%≤BCL <75%
●●●☆
Green
100% Indicator slowly flashing
25%,50%,75% Indicators on solid
75%≤BCL <100%
●●●●
Green
25%,50%,75%,100%Indicators on solid
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 On/Off of the load via the button
3.2 Standard Display unit (XDS1)

14
(1)LED indicator
Indicator
Color
Status
Instruction
Green
On Solid
PV connection normal but
low voltage(low irradiance)
from PV, no charging
Green
OFF
No PV voltage(night time) or
PV connection problem
Green
Slowly Flashing(1Hz)
In charging
Green
Fast Flashing (4Hz)
PV Over voltage
Red
On Solid
Load ON
Red
OFF
Load OFF
(2)Button
Mode
Note
Load ON/OFF
In load manual mode, it can turn the load On/Off 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

15
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
Load OFF
Current/Consumed energy/Load mode
2) Browse interface

16
3)Load parameter dispaly
Display：Current/Consumed energy/Load working mode-Timer1/ Load working
mode-Timer2
4)Setting
①Clear the generated energy
Operation:
Step 1: Press the button and hold 5s under the PV generated energy
interface and the value will be flashing.
Step 2: Press the button to clear the generated energy.
②Switch the battery temperature unit
Press the button and hold 5s under the battery temperature interface.
③Battery type
Operation:
Step1: Press the button and hold 5s under the battery voltage interface.
Step2: Press the button when the battery type interface is flashing.
Step3: Press the button to confirm the battery type.
CAUTION：Please refer to chapter 4.1 for the battery control voltage
setting, when the battery type is User.
④Load working mode

17
Operation:
Step1: Press the button and hold 5s under the load mode interface.
Step2: Press the button when the load mode interface is flashing.
Step3: Press the button to confirm the load mode.
NOTE：Please refer to chapter4.2 for the load working modes.
3.3 Adanced Display unit (XDS2)
(1)Indicator
Indicator
Color
Status
Instruction
Green
On Solid
PV connection normal but low
voltage(low irradiance) from
PV, no charging
Green
OFF
No PV voltage(night time) or
PV connection problem
Green
Slowly Flashing(1Hz)
In 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