Epever XTRA-N Series User manual

XTRA-N series
- MPPT Solar controller
User manual
Models:
XTRA1210N/XTRA2210N
XTRA3210N/XTRA4210N
XTRA3415N/XTRA4415N

Important safety instructions
Store the manual carefully for future reference.
This manual contains all safety, installation and operating instructions for the Maximum
Power Point Tracking (MPPT) controller in the XTRA N Series (referred to in this manual as
"controller").
General safety information
➢Read all instructions and warnings in this manual carefully before installation.
➢There is no component inside the controller that can be serviced by the
user. DO NOT use the controller or attempt to repair it.
➢Install the controller indoors. Do not expose the controller to the elements
and prevent water from entering the controller.
➢Install the controller in a well-ventilated area. The controller heatsink can
get very hot during operation.
➢We recommend installing suitable external fuses/circuit breakers.
➢Make sure all PV panels and battery fuses/disconnects are disconnected
before installing and adjusting the controller.
➢All cables must be tightly connected to prevent excessive heating of
loose connections.

3
1. General information
1.1 Overview
The XTRA-N series comes with a new design philosophy. The new charging power
and current limiting function automatically ensures stability when working with
oversized PV modules and when operating at higher temperatures. At the same time,
it is water- and dust-resistant thanks to the IP32 protection rating and adds a
professional protection chip for the communication port to further improve the
controller's reliability and meet various application requirements.
By further optimizing the MPPT control algorithm, the XTRA N series can minimize
the loss of the maximum power point, quickly track the maximum power point of the
PV system, and extract the maximum amount of energy from the solar modules
under any conditions. Furthermore, it can increase the energy utilization ratio of the
solar system by 10%-30% compared to the PWM charging method.
The XTRA N series has a three-stage charging algorithm based on a digital control
circuit, which can effectively extend battery life and greatly improve system
performance. It also has comprehensive electronic protection against overcharging,
over-discharging, or over-discharging of batteries, etc., which ensures that the solar
system will be more reliable and durable. This series of controllers can be widely
used for RV, communication base stations, home systems, monitoring and many
other fields.
Features:
•LCD display unit XDS2
•Full-load operation with no drop in capacity over the operating temperature range
•Dustproof and waterproof design thanks to IP32 protection rating★
•Internationally recognized ST and IR brand components are used to ensure good
product life due to their high quality and low defect rate
•The communication port uses a professional protection chip that can provide 5V
DC power and has over-current and short circuit protection.
•Advanced Maximum Power Point Tracking Technology (MPPT) with at least
99.5% efficiency.
•Very high tracking speed and guaranteed tracking efficiency.
•Advanced MPPT control algorithm to minimize maximum power point loss and
lost time
•High quality components, improving system performance with maximum
efficiency up to 98%.
•Accurate detection and monitoring of MPPT performance
•Automatic limitation of charging power and current
•Wide operating voltage range of MPP.
•Compatible with lead acid and lithium batteries
•Battery temperature compensation function

4
•Real-time energy statistics function.
•Automatic power reduction function in case of excessive overheating
•Possibility of different modes for load
•RS-485 communication interface with Modbus protocol
•Monitoring and parameter setting via mobile phone or PC app
•Comprehensive electronic protection
★3-Dustproof: can prevent the ingress of solid foreign objects with diameter larger
than 2.5mm;
2-Waterproof: when tilted to 15 degrees, it can still prevent water droplets from
entering.
1.2 Characteristics
Figure 1 Product characteristics
❶
RTS
★
port
❺
RS485 port
❷
PV clamps
❻
Clamp cover
❸
Battery clamps
❼
Imaging unit
❹
Load clamps
❽
Mounting hole size Φ5
★If the temperature sensor is short-circuited or damaged, the controller will
charge or discharge at the default temperature setting of 25°C.

5
2. Installation instructions
2.1 General installation notes
Read the entire installation instructions before installation to familiarize yourself
with the installation steps.
Use extreme caution when installing batteries, especially acid-filled lead-acid
batteries. Wear eye protection and have fresh water available for rinsing and
washing in case of contact with battery acid.
Keep the battery out of reach of metal objects that could cause it to short out.
Explosive gases may be emitted from the battery during charging, so
ensure proper ventilation during charging.
If the installation is in a housing, we strongly recommend that ventilation is
provided. Never install the controller in a sealed housing with flooded batteries!
Battery vapors can etch and destroy the controller's circuitry.
Loose power connections and corroded cables can result in higher temperatures
that can melt wire insulation, burn surrounding materials, or even cause a fire.
Ensure tight connections and use cable clamps to secure cables and prevent them
from swaying in mobile applications.
The controller can operate with a lead acid battery and a lithium battery within its
control range.
Battery connections can be wired to a single battery or a set of batteries. The
following instructions refer to a single battery, but it is assumed that the battery
connection can be made to either a single battery or a set of batteries.
Multiple identical controller models can be installed in parallel to the same set of
batteries to achieve higher charging current. Each controller must have its own solar
module(s).
Select the correct cable cross section according to the current density of 5A/mm2.
2.2 PV system requirements
(1) Serial connection (series) of PV modules
As a basic part of a PV system, the controller can be suitable for different types of PV
modules and can thus maximize the conversion of solar energy into electricity.
According to the open circuit voltage (Voc) and the maximum voltage point (VMpp) of
the MPPT controller, the combination of different types of PV modules can be
calculated. The table below is for information only.

6
XTRA1210/2210/3210/4210N - max voltage of Voc PV module 100V:
System
voltage
36 articles
Voc＜23V
48 articles
Voc＜31V
54 articles
Voc＜34V
60 articles
Voc＜38V
Max.
Best
Max.
Best
Ma
x.
Best
Max.
Best
12V
4
2
2
1
2
1
2
1
24V
4
3
2
2
2
2
2
2
System
voltage
72 articles Voc
＜
46 V
96 cells Voc＜62 V
Voc＞80 V thin
film module
Max.
Best
Shi
Max.
Best
12V
2
1
1
1
1
24V
2
1
1
1
1
XTRA3415/4415N - max voltage Voc of photovoltaic module 150V:
System
voltage
36 articles
Voc＜23 V
48 articles
Voc＜31 V
54 articles
Voc＜34 V
60 articles
Voc＜38 V
MAX.
Best
MAX.
Best
MAX.
Best
MAX.
Best
12 V
4
2
2
1
2
1
2
1
24 V
6
3
4
2
4
2
3
2
48 V
6
5
4
3
4
3
3
3
System
voltage
72 cells Voc＜46 V
96 cells Voc＜62 V
Module with
thin film
Voc＞80 V
MAX.
Best
MAX.
Best
12 V
2
1
1
1
1
24 V
3
2
2
1
1
48 V
3
2
2
2
1
NOTE: The above parameter values are calculated according to standard test
conditions (STC): irradiance 1000 W/m2, module temperature 25℃, air mass 1.5.
(2) Max. power of PV system
The MPPT controller has a current/power limiting function, 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
charging current or power, which can effectively protect the charging parts of the
controller and prevent the controller from being damaged due to the connection of
some PV modules with overspecification. The actual function of the PV system is as
follows:
Condition 1:
actual charging power of the PV system ≤ nominal charging power of the controller
Condition 2:
actual charging current of the PV system ≤ nominal charging current of the controller

7
When the controller operates under "Condition 1" or "Condition 2", it will perform
charging according to the actual current or power; at this time, the controller can
operate at the maximum power point of the PV system.
WARNING: If the PV output is not greater than the rated charging power,
but the maximum voltage across the PV array disconnected circuit is
greater than 100V(XTRA **10N) or 150V(XTRA **15N) (at the lowest
ambient temperature), damage to the controller may occur.
Condition 3:
actual power of PV system ＞nominal charging power of controller
Condition 4:
actual charging current of the PV system ＞nominal charging current of the controller
When the controller operates under "Condition 3" or "Condition 4", it will perform
charging according to the actual current or power.
WARNING: If the PV output is higher than the rated charging power but
the maximum voltage across the PV array disconnected circuit is higher
than 100V(XTRA **10N) or 150V(XTRA **15N) (at the lowest ambient
temperature), damage to the controller may occur.
According to the "peak sunshine clock diagram", if the output of the PV system
exceeds the rated charging power of the controller, the charging time is extended
according to the rated power so that more energy can be obtained to charge the
battery. In practice, however, the maximum output of the PV array must not exceed
1.5 times the rated charging power of the controller. If the maximum power of the PV
array exceeds too much of the rated charging power of the controller, it will not only
cause destruction of the PV modules, but also increase the voltage of the PV array
disconnected circuit due to the effect of ambient temperature, which may cause a
higher probability of damage to the controller. Therefore, it is very important to
configure the system appropriately. The recommended maximum PV system output
for this controller can be found in the following table
Model
Rated
charging
current
Rated
charging
performan
ce
Max. power of
PV system
Max. voltage
of PV open
Circuit
XTRA1210N
10A
130 W/12 V
260W/24V
195W/12V
390W/24V
①
92V
②
100V
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
XTRA3415N
30A
390W/12V
780W/24V
580W/12V
1170W/24V
150 V①

8
XTRA4415N
40A
520W/12V
1040W/24V
2080W/48V
780W/12V
1560W/24V
3120W/48V
138 V②

9
①At ambient temperature 25℃
②At minimum ambient operating temperature
2.3 Wire size
Wiring and installation shall meet current applicable electrical standards.
➢PV wire size
As the PV system performance may vary due to PV module size, connection method
or sunlight angle, the maximum conductor size can be calculated by Isc
＊PV systems. See Isc value in PV module specification. When PV modules are
connected in series, Isc is equal to the Isc of PV modules. When PV modules are
connected in parallel, Isc is equal to the sum of Isc of PV modules. The Isc of the PV
array shall not exceed the maximum input current of the PV controller. See table
below:
NOTE: All PV modules in a given system are considered identical.
＊Isc = short circuit current (amps) Voc = voltage of the disconnected circuit.
Model
Max. PV input current
Max. size of PV wires＊
XTRA1210N
10A
4mm2/12AWG
XTRA2210N
20A
6mm2/10AWG
XTRA3210N
30A
10mm2/8AWG
XTRA4210N
40A
16mm2/6AWG
XTRA3415N
30A
16mm2/6AWG
XTRA4415N
40A
16mm2/6AWG
＊This is the maximum size of wires that will fit into the terminals of the controller.
CAUTION: When PV modules are connected in series, the open circuit
voltage of the PV system must not exceed 92V (XTRA**10N) or 138V
(XTRA
**15N) at an ambient temperature of 25°C.
➢Battery and load wire size
The size of the battery lead and load lead must match the rated current, see
reference sizes below:
Model
Rated
charging
current
Rated
discharge
current
Battery
lead size
Stress size
condu
ctor
dimen
sion

10
XTRA1210N
10A
10A
4mm2/12AWG
4mm2/12AWG

9
XTRA2210N
20A
20A
6mm2/10AWG
6mm2/10AWG
XTRA3210N
30A
30A
10mm2/8AWG
10mm2/8AWG
XTRA4210N
40A
40A
16mm2/6AWG
16mm2/6AWG
XTRA3415N
30A
30A
16mm2/6AWG
16mm2/6AWG
XTRA4415N
40A
40A
16mm2/6AWG
16mm2/6AWG
ATTENTION: The wire size is only informative. If there is a large distance
between the PV system and the controller, or between the controller and
the battery, larger conductors can be used to reduce voltage drop and
thus
performance improvement.
CAUTION: The recommended wire will be selected for the battery in
accordance with the condition that the battery terminals are not connected
to any other inverter.
2.4 Installation
WARNING: Risk of explosion! Never install the driver in a sealed case with
flooded batteries! Do not install it in confined spaces where battery fumes
may accumulate.
WARNING: Risk of electric shock! When connecting solar modules, the PV
generator can generate high open circuit voltages, so turn off the circuit
breaker before connecting and use caution when connecting.
CAUTION：The regulator requires a minimum of 150 mm clearance above and
below the regulator for proper airflow. If mounting in a housing, it is strongly
recommended to provide sufficient ventilation.
Installation procedure:

10
Figure 2-1 Assembly
Step 1 : Determine the installation location and heat dissipation area
Installation location: the controller requires a minimum of 150 mm clearance above
and below the controller for proper airflow. See Figure 2-1: Installation
CAUTION: If mounting in a housing, it is important to ensure reliable heat
dissipation through the controller box.
Step 2Connect the system in the order ❶battery ❷load ❸ PV system according to
Figure 2-2 "Wiring Diagram" and disconnect the system in the reverse order ❸❷.
WARNING: When wiring the controller, do not switch the circuit breaker or
activate the fuse and make sure the "+" and "-" pole wires are properly
connected.
CAUTION: A fuse for a current of 1.25 to 2 times the rated current of the
controller must be installed on the battery side at a distance of 150 mm or
less from the battery.
CAUTION: If the controller is to be used in areas with frequent lightning or
in an unprotected area, an external surge protector must be installed.
CAUTION: If the inverter is to be connected to the system, connect the
inverter directly to the battery, not to the controller load.
Step 3：Grounding
The XTRA N series is a negatively grounded controller where all or any of the
negative terminals of the PV system, battery and load can be grounded
simultaneously. However, depending on the practical application, all negative
terminals of the PV array, battery and load need not be grounded, but the ground
terminal must be grounded, which can effectively

11
to protect against electromagnetic interference from outside and prevent electric
shock to persons caused by electricity on the jacket.
WARNING: For negatively grounded systems such as a motorhome, it is
recommended to use a negatively grounded controller, but if any common
positively grounded equipment is used in a common negative system and
the positive electrode is grounded, there may be
damage to the controller.
Step 4：Connect accessories
Connect the remote temperature sensor cable
Temperature
sensor
Remote temperature sensor
Cable (optional)
（Model:RT-MF58R47K3.81A）（Model:RTS300R47K3.81A）
Connect the remote remote sensor temperature sensor cable to the ①interface and
place the other end near the battery.
CAUTION: If the remote temperature sensor is not connected to the
controller, the default setting for charging or discharging the battery is
25°C without temperature compensation.
Connect accessories for RS 485 communication
See chapter 4 "Setting control parameters".
CAUTION: RS485 The internal circuit of the communication port does not
have an isolation structure, so it is recommended to connect the
communication isolator to the interface before performing communication
procedures.
Step 5: Power supply to the controller
Disconnecting the battery fuse circuit turns the controller on. Then check the status
of the battery indicator (the controller operates normally when the indicator light is
green). Disconnect the fuse and circuit breaker circuit of the load and PV system.
Then the system will operate in the preset mode.
WARNING: If the controller is not functioning properly or the battery
indicator on the controller shows an abnormality, refer to Section 5.2
"Troubleshooting".

12
3. Imaging unit
Display unit (XDS2)
(1) Indicator
Indicator
Colour
Stat
us
Instru
ction
Green
Shining
PV connection normal, but
low voltage (low radiation)
from PV, without charging
Green
VYP
No PV voltage (night time) or
PV connection problem
Green
Flashes slowly (1 Hz)
Charging
Green
Fast flashing (4 Hz)
Voltage surge PV
Green
Shining
Normal
Green
Flashes slowly (1Hz)
Full
Green
Fast flashing (4 Hz)
Surge
Orange
Shining
Suspension
Red
Shining
Excessive discharge
Red
Flashes slowly (1Hz)
Battery overheating
Lithium battery - low
temperature①
Yellow
Shining
ZAP load
Yellow
VYP
Load VYP
Fast flashing PV&BATTLED
Overheating of the controller
System voltage error②

13
① When using a lead-acid battery, the controller does not have low temperature protection.
② When using a lithium battery, the system voltage cannot be automatically detected
(2) Buttons
Press the button
Browsing the PV interface
Data settings +
Press the button and
hold for 5 s
LCD cycle time setting
Press the button
Browsing the BATT interface
Move the cursor during setup
Press and hold the
button for 5
seconds
Setting the battery type, battery charge
status and temperature unit.
Press the button
Browsing the controller load interface
Data settings -
Press the button and
hold for 5 s
Operating load setting mode
Press the button
Enter the settings interface
Switch interface settings to interface
browsing
Setting the parameter as a button for input
Press the button
Leaving the settings interface
(3) Display
Icon
Informatio
n
Icon
Information
Icon
Information
Day
Without
chargin
g
Without
dischar
ging

14
Night
Charging
Discharging
1) PV parameters
Display: voltage/current/power/energy generated
2) Battery parameters
Display: voltage/current/temperature/battery charge status
3) Load parameters
Display: voltage/current/power/energy consumption/load mode - timer 1/load mode -
timer 2
(4) Settings parameters
1) Battery type
Hermetically sealed
(Default)
Gel Flooded User

15
Procedure:
Step 1: Press the button for the settings interface.
Step 2: Press and hold the button for 5 seconds for the battery type interface.
Step 3: Press the button or to select the battery type.
Step 4: Press the button to confirm the selected battery type.
ATTENTION ：For information about the battery voltage setting of the
controller, please refer to chapter 4.1 if the battery type is User.
2) Battery capacity
Procedure:
Step 1: Press the button for the settings interface.
Step 2: Press and hold the button for 5 seconds for the battery type interface.
Step 3: Press the button for the battery capacity interface.
Step 4: Press the button or to set the battery capacity.
Step 5: Press the button to confirm the parameters.
3) Temperature units

16
Procedure:
Step 1: Press the button for the settings interface.
Step 2: Press and hold the button for 5 seconds for the battery type interface.
Step 3: Press the button twice for the temperature unit interface.
Step 4: Press the button orto adjust the temperature units.
Step 5: Press the button to confirm the parameters.
4) LCD cycle time
NOTE: The default LCD cycle time is 2 s, the setting time range is 0~20 s.
Procedure:
Step 1: Press the button for the settings interface.
Step 2: Press and hold the button for 5 seconds to interface the LCD cycle time.
Step 3: Press the button or to set the LCD cycle time.
Step 4: Press the button to confirm the parameters.
5) Load mode

17
Procedure:
Step 1: Press the button for the settings interface.
Step 2: Press and hold the button for 5 seconds for the load mode setting interface.
Step 3: Press the button or to set the operating mode.
Step 4: Press the button to confirm the parameters.
NOTE: for load mode, see section 4.2.

18
4. Setting the control parameters
4.1 Battery types
4.1.1 Supported battery types
Item
Lead-acid batteries with
with acid electrolyte
Lithium battery
1
Hermetically sealed (Default)
LiFePO4(4s/12V; 8s/24V)
2
Gel
Li(NiCoMn)O2 (3s/12V; 6s/24V)
3
Flooded
User (9～34 V)
4
User (9～17V/12V; 18～34V/24V;
36～68V/48V)
CAUTION: When selecting the default battery type, the battery
voltage management parameters will be set by default and cannot be
changed. To change these parameters, select the battery type
"User".
4.1.2 Battery voltage control parameters
Parameters below are for a 12 V system at 25 °C, double the values for a 24 V
system
Battery type
Voltage
Hermetically
sealed
Gel
Flooded
User
Disconnection voltage at
Surge
16.0V
16.0V
16.0V
9～17V
Charging limit voltage
15.0V
15.0V
15.0V
9～17V
Connection recovery
voltage
during overvoltage
15.0V
15.0V
15.0V
9～17V
Rechargeable charging
Equalization
14.6V
--
14.8V
9～17V
Boost charging voltage
14.4V
14.2V
14.6V
9～17V
Charging Voltage Float
13.8V
13.8V
13.8V
9～17V
Boost charging voltage at
reconnection
13.2V
13.2V
13.2V
9～17V
Low voltage at recovery
Connect
12.6V
12.6V
12.6V
9～17V
Warning refresh
undervoltage
12.2V
12.2V
12.2V
9～17V
Warning voltage at
Unclasp
12.0V
12.0V
12.0V
9～17V