Epever Tracer 2210CN User manual

Tracer CN/EM1 Series
——MPPT (Embedded) Solar Charge Controller
User Manual
Models：
Tracer2210CN
Tracer3210CN
Tracer2210EM1(Embedded)
Tracer3210EM1(Embedded)

Important Safety Instructions
Please reserve this manual for future review. This manual contains all instructions of
safety, installation and operation for Maximum Power Point Tracking (MPPT)
controller in TracerCN/EM1 series("the controller" is referred in this manual).
General Safety Information
Read carefully all the instructions and warnings in the manual before installation.
No user serviceable component inside controller. DO NOT disassemble or attempt
to repair the controller.
Mount the controller indoors. Prevent exposure to the elements and do not allow
water to enter the controller.
Install the controller in well ventilated places, the controller‟s heat sink may
become very hot during operation.
Suggested to install appropriate external fuses/breakers.
Make sure switching off all connections with PV array and the fuse/breakers close
to battery before controller installation and adjustment.
Power connections must remain tight to avoid excessive heating from a loose
connection.
Information générales sur la sécurité
Liseztoutes les instructions etprécautionsdans le manuelavantl'installation.
Iln‟y a aucune pièce utilisable pour l‟utilisateur à l‟intérieur du contrôleur. Ne
démontez pas oun'essayez pas de réparer le contrôleur.
Montez le contrôleurenintérieur. Évitezl'exposition des élémentset ne laissez pas
d'eauentrerdans le contrôleur.
Installez le contrôleur Tracer dansunendroitbienventilé, le dissipateur de chaleur
de l'Tracerpeutdevenirtrèschaud pendant l'utilisation.
Installez les fusibles / coupe-circuits commeindiqué.
Déconnectez le module solaire, le chargeuret le fusible / coupe-circuit proche de
la batterieavantl'installationou le réglage du contrôleur.
Les connexionsd'alimentationdoiventrester àproximitépour évierunechaleur
excessive du fait d'uneconnexion trop lâche.

Contents
1 General Information.................................................................... 1
1.1Overview............................................................................ 1
1.2 Characteristics................................................................... 2
1.3 Optional Accessories......................................................... 3
1.4 Maximum Power Point Tracking Technology...................... 3
1.5 Battery Charging Stage...................................................... 5
2 Installation Instructions............................................................... 8
2.1 General Installation Notes.................................................. 8
2.2 PV Array Requirements..................................................... 8
2.3 Wire Size......................................................................... 10
2.4 Mounting ......................................................................... 11
3 Operation................................................................................. 13
3.1 LED Indictor Instruction.................................................... 13
3.2 Dry Contact Working Mode.............................................. 13
3.3Parameters Setting and Monitoring................................... 15
3.4Battery Type..................................................................... 16
4 Protections, Troubleshooting and Maintenance......................... 17
4.1 Protection........................................................................ 17
4.2 Troubleshooting............................................................... 18
4.3 Maintenance.................................................................... 18
5 Technical Specifications........................................................... 20
Annex I Conversion Efficiency Curves ......................................... 21
Annex II Dimensions.................................................................... 23

1
1General Information
1.1 Overview
Tracer-CN/EM1 series adopts common negative designand advanced MPPT control
algorithm, and introduces original dry contact design to achieve the switch of external
equipment. The integration design not only replaces traditional electrical design
using external relay, what is more can achieve multiple control modes and working
modes, it can be widely used in household system, field monitoring and
communication station etc.
Feature:
Original dry contact design, achieve the switch of external equipment
Multiple dry contact control mode, local, remote and cross- network
Multiple dry contact working modes: manual control, light ON/OFF, light ON+timer
and time control
High tracking efficiency no less than 99.5%
Peak conversion efficiency of 97.5%, full-load efficiency of 96%
Accurately recognizing and tracking of multiple power points.
Battery temperature compensation function
Real-time energy statistics function
RS485 port with industrial standard MODBUS open architecture
Fully programmable function via PC software or remote meter
Support software upgrade.

2
1.2 Characteristics
Item
Name
Item
Name
①
Charge LED Indicator
⑥
Battery Terminals
②
Battery LED Indicator
⑦
Remote Button Port
③
Dry Contact Switch Button
⑧
Dry Contact Port
④
RTS Port①
⑨
RS-485 Port②(12VDC)
⑤
PV Terminals
Explanations:
①Connection for a RTS (Remote Temperature Sensor) to remotely detect battery
temperature.
②Monitor controller by PC, remote meter MT70 or via RS485 (RJ45 interface).
Figure 1-1 Tracer-CN Series Characteristics
⑦
①
②
③
⑨
⑧
⑥
⑤
④

3
1.3 Optional Accessories
1) Remote Temperature Sensor (Model:RTS300R47K3.81A)
Acquisition of battery temperature for undertaking temperature compensation of
control parameters, the standard length of the cable is 3m (length can be
customized). The RTS300R47K3.81A connects to the port (④) on the controller.
NOTE: Unplug the RTS, the temperature of battery will be set to a fixed value 25ºC.
2) USB to RS-485 converter cable (Model:CC-USB-RS485-150U-3.81)
USB To RS-485 converter cable is used to monitor each controller on the network
using Solar Station PC software. The length of cable is 1.5m. The cable connects to
the port (⑨) on the controller.
3) OTG cable (Model: OTG-12CM)
The USB To RS-485 converter cable and the OTG cable are used to view and
modify the working mode and the parameters using the APP software. The USB To
RS-485 converter cable connects to the port (⑨) on the controller.
1.4 Maximum Power Point Tracking Technology
Due to the nonlinear characteristics of solar array, there is a maximum energy
output point (Max Power Point) on its curve. Traditional controllers, with switch
charging technology and PWM charging technology, can‟t charge the battery at the
maximum power point, so can‟t harvest the maximum energy available from PV
array, but the solar charge controller with Maximum Power Point Tracking (MPPT)
Technology can lock on the point to harvest the maximum energy and deliver it to
the battery.
The MPPT algorithm of our company continuously compares and adjusts the
operating points to attempt to locate the maximum power point of the array. The
tracking process is fully automatic and does not need user adjustment.
As the Figure 1-2, the curve is also the characteristic curve of the array, the MPPT
technology will „boost‟ the battery charge current through tracking the MPP.
Assuming 100% conversion efficiency of the solar system, in that way, the following
formula is established:
Input power (PPV)= Output power (PBat)
Input voltage (VMpp) *input current (IPV) =Battery voltage (VBat) *battery current (IBat)
Normally, the VMppis always higher than VBat, Due to the principle of conservation of
energy, the IBat is always higher than IPV. The greater the discrepancy between

4
VMpp&VBat, the greater the discrepancy between IPV&IBat. The greater the discrepancy
between array and battery,the bigger reduction of the conversion efficiency of the
system, thus the controller‟s conversion efficiency is particularly important in the PV
system.
Figure 1-2 is the maximum power point curve, the shaded area is charging range of
traditional solar charge controller (PWM Charging Mode), it can obviously diagnose
that the MPPT mode can improve the usage of the solar energy resource. According
to our test, the MPPT controller can raise 20%-30% efficiency compared to the PWM
controller. (Value maybe fluctuant due to the influence of the ambient circumstance
and energy loss.)
Figure 1-2 Maximum Power Point Curve
In actual application, as shading from cloud, tree and snow, the panel maybe appear
Multi-MPP, but in actually there is only one real Maximum Power Point. As the below
Figure 1-3 shows:
Figure 1-3 Mutil-MPP Curve

5
If the program works improperly after appearing Multi-MPP, the system will not work
on the real max power point, which may waste most solar energy resources and
seriously affect the normal operation of the system. The typical MPPT algorithm,
designed by our company, can track the real MPP quickly and accurately, improve
the utilization rate of the array and avoid the waste of resources.
1.5 Battery Charging Stage
The controller has a 3 stages battery charging algorithm (Bulk Charging, Constant
Charging and Float Charging) for rapid, efficient, and safe battery charging.
A) Bulk Charging
In this stage, the battery voltage has not yet reached constant voltage (Equalize or
Boost Voltage), the controller operates in constant current mode, delivering its
maximum current to the batteries (MPPT Charging).
B) Constant Charging
When the battery voltage reaches the constant voltage setpoint, the controller will
start to operate in constant charging mode, this process is no longer MPPT charging,
and in the meantime the charging current will drop gradually, the process is not the
MPPT charging. The Constant Charging has 2 stages, equalize and boost. These
two stages are not carried out constantly in a full charge process to avoid too much
Figure 1-4Battery changing stage Curve

6
gas precipitation or overheating of battery.
Boost Charging
The Boost stage maintain 2 hours in default, user can adjust the constant time and
preset value of boost voltage according to demand.
The stage is used to prevent heating and excessive battery gassing.
Equalize Charging
WARNING:Explosive Risk!
Equalizing flooded battery would produce explosive gases, so well
ventilation of battery box is recommended.
CAUTION: Equipment damage!
Equalization may increase battery voltage to the level that damages
sensitive DC loads. Verify that all load allowable input voltages are
11% greater than the equalizing charging set point voltage.
CAUTION: Equipment damage!
Over-charging and excessive gas precipitation may damage the
battery plates and activate material shedding on them. Too high an
equalizing charge or for too long may cause damage.
Please carefully review the specific requirements of the battery used
in the system.
AVERTISSEMENT:Risqued‟explosion!
l'égalisation de batteries noyéespeutproduire des gazexplosifs,
doncilestrecommandéde bienventiler le boitier de la batterie.
ATTENTION: Dégât sur l'équipement!
L'égalisationpeut augmenter la tension de la
batteriejusqu'àunniveaunuisible pour les charges CC sensibles.
Vérifiez que la tension d'entréeautorisées de toutes les charges
disponiblessontsupérieures à11% àla tension du point d'installation
de chargementd'égalisation.
ATTENTION:Dégât sur l'équipement!
Unchargementexcessif et uneprécipitation de gazpeutendommager
les plaques de la batterie et la formation de matières actives dessus.
Unchargement trop fort ouuneégalisationprolongéepeut causer des
dégâts. Inspectezsoigneusement les conditions spécifiques de la
batterieutiliséedans le système.
Some types of batteries benefit from equalizing charge on a regular basis, which is
able to stir electrolyte, balance battery voltage and accomplish chemical reaction.

7
Equalizing charge increases battery voltage, higher than the standard complement
voltage, which gasifies the battery electrolyte.
The controller will equalize the battery on 28th each month. The constant
equalization period is 0~180 minutes. If the equalization isn‟t accomplished in
one-time, the equalization recharge time will be accumulated until the set time is
finished. Equalize charge and boost charge are not carried out constantly in a full
charge process to avoid too much gas precipitation or overheating of battery.
NOTE:
1)Due to the influence of ambient circumstance or load working, the battery
voltage can’t be steady in constant voltage, controller will accumulate and
calculate the time of constant voltage working. When the accumulated time
reach to 3 hours, the charging mode will turn to Float Charging.
2)If the controller time is not adjusted, the controller will equalize charge
battery once every month following the inner time.
C) Float Charging
After the Constant voltage stage, the controller will reduce charging current to Float
Voltage setpoint. This stage will have no more chemical reactions and all the charge
current transforms into heat and gas at this time. Then the controller reduces the
voltage to the floating stage, charging with a smaller voltage and current. It will
reduce the temperature of the battery and prevent the gassing and charging the
battery slightly at the same time. The purpose of Float stage is to offset the power
consumption caused by self consumption and small loads in the whole system, while
maintaining full battery storage capacity.
In Float charging stage, loads are able to obtain almost all power from solar panel. If
loads exceed the power, the controller will no longer be able to maintain battery
voltage in Float charging stage. If the battery voltage remains below the Recharge
Voltage, the system will leave Float charging stage and return to Bulk charging
stage.

8
2Installation Instructions
2.1 General Installation Notes
Before installation, please read through the entire installation instructions to get
familiar with the installation steps.
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.
Gel, Sealed or Flooded batteries are recommended, other kinds please refer to
the battery manufacturer.
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 canmelt
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.
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
Serial connection (string) of PV modules
As the core component of PV 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

9
be calculated. The below table is for reference only.
Tracer2210CN/EM1; Tracer3210CN/EM1:
System
voltage
36cell
Voc＜23V
48cell
Voc＜31V
54cell
Voc＜34V
60cell
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
72cell
Voc＜46V
96cell
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.)
PV array maximum power
This MPPT controller has a limiting function of charging current, the charging current
will be limited within rated range, therefore, the controller will charge the battery with
the rated charging power even if the input power at the PV exceeds.
The actual operation power of the PV array conforms to the conditions below:
1）PV array actual power ≤ controller rated charge power, the controller charge
battery at actual maximum power point.
2）PV array actual power > controller rated charge power, the controller charge
battery at rated power.
If the PV array higher than rated power, the charging time at rated power to battery
will be longer, more energy to battery yields.
WARNING: Controller will be damaged when the PV array straight
polarity and the actual operation power of the PV array is three times
greater than the rated charge power!
WARNING: Controller will be damaged when the PV array reverse
polarity and the actual operation power of the PV array is 1.5 times
greater than the rated charge power!
When the PV array straight polarity, the actual operation of the PV array must NOT
exceed three times of rated charge power；When the PV array reverse polarity, the
actual operation must NOT exceed 1.5 times. For real application please refer to the

10
table below:
Model
Rated Charge
Current
Rated Charge
Power
Max. PV Array
Power
Max. PV open circuit
voltage
Tracer2210CN/EM1
20A
260W/12V
520W/24V
780W/12V
1560W/24V
92V①
100V②
Tracer3210CN/EM1
30A
390W/12V
780W/24V
1170W/12V
2340W/24V
①At 25℃environment temperature
②At minimum operating environment temperature
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 PV module specification. When the PV modules
connect in series, the Isc is equal to the PV module‟s Isc. When the PV modules
connect in parallel, the Isc is equal to the sum of PV module‟s Isc. The Isc of PV array
must not exceed the maximum PV input current, please refer to the table as below:
Model
Max. PV input current
Max. PV wire size(mm2/AWG)
Tracer2210CN/EM1
20A
6/10
Tracer3210CN/EM1
30A
10/8
NOTE: When the PV modules connect in series, the open circuit voltage of the PV
array must not exceed 92V (25℃)
Battery Wire Size
The battery and load wire size must conform to the rated current, the reference size
as below:
Model
Rated charge current
Battery wire size(mm2/AWG)
Tracer2210CN/EM1
20A
6/10
Tracer3210CN/EM1
30A
10/8
NOTE: 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.

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2.4Mounting
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.
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!
Exercise caution when handling solar wiring. The solar PV array can
produce open-circuit voltages in excess of 100V when in sunlight.Pay
more attention to it.
ATTENTION: Le contrôleurTracer nécessite au moins un espace
libre de 150mm au dessus et en dessous pour une circulation
correcte de l'air. Une ventilation est hautement recommandée en cas
d'installation dans un boitier.
AVERTISSEMENT: Risque d‟explosion ! N'installez jamais le Tracer
dans un boitier ferméavec des batteries noyées! N'installez pas dans
un espace confinéoùdes gaz de batterie peuvent s'accumuler.
AVERTISSEMENT: Risqued'électrochoc!
Faites attention lors de la manipulation des connexionssolaires. La
matrice PV solairepeutproduire des tensions supérieures à100V, àla
lumière du soleil. Soyezparticulièrementattentif àcela.
Figure 2-1 Mounting

12
1) Connect components to the charge controller in the sequence as shown above
and pay much attention to the “+” and “-”. Please don‟t turn on the fuse during the
installation. When disconnecting the system, the order will be reserved.
2) After installation, power the controller and check the battery LED indicator on. If it‟s
not on, please refer to chapter 4. Always connect the battery first, in order to allow
the controller to recognize the system voltage.
3) The battery fuse should be installed as close to battery as possible. The suggested
distance is within 150mm.
4) The Tracer CN/EM1 series is a negative ground controller. Any negative
connection of PV or battery can be earth grounded as required.
CAUTION: Unplug the RTS, the temperature of battery will be set to a
fixed value 25 ºC.
CAUTION: Please connect the inverter to the battery rather than to the
controller, if the inverter is necessary.

13
3Operation
3.1LED Indictor Instruction
LED Indicator
Color
Indicator
Status
Green
On Solid
PV connection normal but low
voltage(irradiance) from PV,
no charging
Green
Slowly Flashing
In charging
Green
OFF
No PV voltage(night time) or
PV connection problem
Green
On Solid
Normal
Green
Slowly Flashing
Full
Green
Fast Flashing
Over voltage
Orange
On Solid
Under voltage
Red
On Solid
Over discharge
Red
Flashing
Battery Overheating
3.2 Dry Contact Working Mode
1)Manual Mode
When the dry contact working mode is manual mode, it can control the ON/OFF of
external equipment through the dry contact switch button or remote button.
Example 1:
It shall connect controller‟s dry contact in parallel to the inverter start switch, so it can
turn ON/OFF the inverter by operating the button. As shown below:

14
Example 2:
It can control the DC contactor coil through this dry contact so as to achieve the
control of the DC device operation.
2) Light ON/OFF
3) Light ON + Timer1
4) Real-time Control
Control the dry contact ON/OFF time through setting real-time clock.

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3.3Parameters Setting and Monitoring
1) APP Software
①Cables
USB to RS-485 converter cable (Model:CC-USB-RS485-150U-3.81).
OTG cable (Model: OTG-12CM).
②Setting Way
APP software can be downloaded from the website of http://www.epsolarpv.com.
Install the downloaded software.
Connect the Mobile phone and controller using above cables.
2) PC Solar Station Monitor
①Cables
USB to RS-485 converter cable (Model:CC-USB-RS485-150U-3.81).
②Setting Way
PC solar station monitor software can be downloaded from the website of
http://www.epsolarpv.com/uploads/news/201506/1434513401716619.rar.
Install the downloaded software.
Connect the PC and controller using above cable.

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3.4Battery Type
①Sealed(Default) ②Gel ③Flooded
④User(Apply to PC software “Solar Station Monitor”）
Battery Voltage Parameters (parameters is in 12V system at 25℃, please use double
value in 24V.)
Battery charging setting
Sealed
Gel
Flooded
User
Over Voltage Disconnect
Voltage
16.0V
16.0V
16.0V
9~17V
Charging Limit Voltage
15.0V
15.0V
15.0V
9~17V
Over Voltage Reconnect
Voltage
15.0V
15.0V
15.0V
9~17V
Equalize Charging Voltage
14.6V
——
14.8V
9~17V
Boost Charging Voltage
14.4V
14.2V
14.6V
9~17V
Float Charging Voltage
13.8V
13.8V
13.8V
9~17V
Boost Reconnect Charging
Voltage
13.2V
13.2V
13.2V
9~17V
Low Voltage Reconnect
Voltage
12.6V
12.6V
12.6V
9~17V
Under Voltage Warning
Reconnect Voltage
12.2V
12.2V
12.2V
9~17V
Under Volt. Warning Volt.
12.0V
12.0V
12.0V
9~17V
Low Volt. Disconnect Volt.
11.1V
11.1V
11.1V
9~17V
Discharging Limit Voltage
10.6V
10.6V
10.6V
9~17V
Equalize Duration (min.)
120
——
120
0~180
Boost Duration (min.)
120
120
120
10~180
NOTE:
1) When the battery type is sealed, gel, flooded, the adjusting range of equalize
duration is 0 to180min and boost duration is 10 to180min.
2)The following rules must be observed when modifying the parameters value in
user battery type(factory default value is the same as sealed type):
a. Over Voltage Disconnect Voltage > Charging Limit Voltage ≥ Equalize Charging
Voltage ≥ Boost Charging Voltage ≥ Float Charging Voltage > Boost Reconnect
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 Disconnect Voltage.

17
4Protections, Troubleshooting and Maintenance
4.1 Protection
PV Over Current
The controller will limit charge power in rated charge power. An over-sized PV array
will not operate at maximum power point.
PV Short Circuit
When PV short circuit occurs, the controller will stop charging. Clear it to resume
normal operation.
PV Reverse Polarity
Fully protection against PV reverse polarity, no damage to the controller will result.
Correct the miswire to resume normal operation.
WARNING: Controller will be damaged when the PV array reverse
polarity and the actual operation power of the PV array is 1.5 times greater
than the rated charge power!
Battery Reverse Polarity
Fully protection against battery reverse polarity, no damage to the controller will
result. Correct the miswire to resume normal operation.
BatteryOver voltage
When battery voltage reaches to the voltage set point of Over Voltage Disconnect,
the controller will stop charging the battery to protect the battery overcharge to break
down.
Battery Over discharge
When battery voltage reaches to the voltage set point of Low Voltage Disconnect,
the controller will stop discharging the battery to protect the battery over discharged
to break down.
Battery Overheating
The controller detects the battery temperature through the external temperature
sensor. If the battery temperature exceeds 65ºC, the controller will automatically
start the overheating protection to stop working and recover below 55 ºC.
Damaged Remote Temperature Sensor
If the temperature sensor is short-circuited or damaged, the controller will be
charging or discharging at the default temperature 25℃to prevent the battery
damaged from overcharging or over discharged.
Controller Overheating
If the temperature of the controller heat sinks exceeds 85℃,the controller will
automatically start the overheating protection and recover below 75℃.
High Voltage Transients
PV is protected against small high voltage surge. In lightning prone areas, additional
external suppression is recommended.