EPEVER DR1106N-DDB, DR1106N-DDS, DR1206N-DDB, DR1206N-DDS, DR2106N-DDB User guide

User Manual

Models:

DR1106N-DDB/DDS

DR1206N-DDB/DDS
DR2106N-DDB/DDS DR2206N-DDB/DDS
DR3106N-DDB/DDS DR3206N-DDB/DDS
DR2210N-DDB/DDS DR3210N-DDB/DDS

DuoRacer Series

——MPPT Dual Battery Solar Charge Controller

Important Safety Instructions

Please reserve this manual for future review.

This manual contains all the instructions of safety, installation, and operation for
DuoRacer series MPPT Dual Battery Solar Charge Controller (referred to as the
controller in this manual).

 Read all the instructions and warnings carefully before installation.
 No user serviceable component inside the controller. Do NOT disassemble or

attempt to repair the controller.

 Avoid direct sunlight, high temperature, and do NOT install the controller at

locations where water can get in.

 Install the controller at well-ventilated places, the controller’s heat sink may

become very hot during the system operation.

 Appropriated external fuses or breaker are suggested.
 Please cut off all connections of the PV array, fuses or breakers which close to

the battery before the controller installation and adjustment.

 Power connections must remain tight to avoid excessive overheating from the

loose connection.

CONTENTS

1. Overview .......................................................................................... 1

1.1Information & Features ............................................................... 1

1.2 Name definition ......................................................................... 2

1.3 Structure .................................................................................... 2

1.4 Starter battery BATT2 Instruction .............................................. 3

1.5 AES Signal Output Port Instruction ........................................... 4

1.6 Accessories ............................................................................... 5

2. Installation ....................................................................................... 7

2.1 Warning ..................................................................................... 7

2.2PV Array Requirements.............................................................. 7

2.3Wire Size .................................................................................. 10

2.4 Mounting ................................................................................. 11

3.Display units .................................................................................. 15

3.1DuoRacerDisplay Basic (DDB) ................................................. 15

3.2 DuoRacerDisplay Standard (DDS) .......................................... 17

4.Protections, Troubleshooting & Maintenance ............................. 23

4.1Protections ............................................................................... 23

4.2 Troubleshooting ...................................................................... 23

4.3 Maintenance ............................................................................ 24

5. Specifications ............................................................................... 26

Annex I Mechanical Dimension Diagram ........................................ 28

1. Overview

1.1Information & Features

DuoRacer MPPT charge controller is made for charging two batteries (shown as
BATT1 and BATT2 below) at the same time in a solar system. This controller supports
multiple life battery (BATT1) types, including Sealed, Gel, Flooded, LiFePO4, and
Li-NiCoMn, which is suitable for RV, Camper, Boat, and so on. The device recognizes
the start battery (BATT2) system voltage automatically, and trickle charges the battery
when the conditions are satisfied.

The controller adopts the advanced MPPT control algorithm,which will minimize the
maximum power point loss rate and loss time,also fast track the maximum power
point(MPP) of the PV array, and obtain the maximum energy from solar array under
any conditions. The energy utilization in the MPPT solar system is increased by 20-30%
compared with PWM charging method.

When there is no manual operation for a long time, and the charging conditions
cannot be reached, the controller will turn to low-power mode, which reduces the loss
and battery power waste to enhance the products life. The system parameters are
shown and set by LED/LCD or the MT11 remote meter (Accessory).

The AES control signal of the car refrigerator is built in the controller, which will supply
the surplus solar power to the refrigerator to avoid energy waste. The controller
comes with IP33 protection level, which is waterproof and dustproof. Multiple
protection features, including battery overcharge protection, over discharge protection,
and reverse connection protection of the PV and battery, which effectively ensure the
solar system safety, stability, and lifetime.

Features：

 Maximum Power Point Tracking technology with ultra-fast tracking speed and the

tracking efficiency is no less than 99.5% guaranteed

 Advanced MPPT control algorithm to minimize the MPPlost rate and lost time
 The wider range of the MPP operation voltage to improve the PV module

utilization

 Auto control function of charging power & charging current limitation(BATT1)
 High quality and low failure rate components of ST, TI and Infineon to ensure the

product life

 Digital circuit control of adaptive three-stage charging mode to enhance BATT1

life.

 BATT1 type can be set via LED/LCD.
 Product runs into the low-power mode when there is no manual operation for a

long time, and charging conditions are not satisfied (PV<5V).

 100% charging and discharging in operationenvironmental temperature range.

1

 LED and LCD dispiay units selectable.
 AES control signal for car refrigerator to avoid energy waste.
 Standard Modbus protocol, and RS485 (5V/200mA) communication port for the

customer to expand the application area.

①Life battery (BATT1) is the energy storage battery for powering the household loads in the
off-grid system, which supports Sealed, Gel, Flooded, LiFePO4, and Li-NiCoMn batteries
(the controller can NOT recognize the system voltage automatically).

②Start battery (BATT2) is the energy storage battery which usually built in the vehicle for
powering the system such as RV and Boat, and only supports lead-acid battery (the
controller will recognize the system voltage automatically).

NOTE: the BATT1 and BATT2 must be at the same voltage level.

1.2 Name definition

1.3 Structure

2

❶

Mounting hole sizeΦ5mm

❻

BATT1 terminals

❷

LCD(Refer to chapter 3)

❼

BATT2 terminals

❸

Grounding Terminal

❽

RS485 Communication port⑵

❹

Remote temperature sensor⑴ port

❾

AES (signal) output port⑵

❺

PV terminals

❿

Terminal protection cover

⑴The controller is charging the BATT1 as default (25℃) without temperature compensation

Item

Default

Modify range

Full voltage

13.8V/12V; 27.6V/24V

9～17V(24V×2)

Charge return voltage

13V/12V; 26V/24V

9～17V(24V×2)

function when it’s not connected to the remote temperature sensor, or the temperature
sensor is damaged. The temperature compensation is ONLY designed for the lead-acid
battery, for lithium battery, there is no temperature compensation.

⑵AES port which output is 12V/200mA and RS485 Port which output is 5V/200mA are
independent of DR1106/2106/3106N models, the AES port output voltage is the battery
voltage. The above two ports of DR1206/2206/3206/2210/3210N models share the power of
5VDC/Max. 200mA

also the AES signal port is designed for AES supporting car refrigerator, It is required for
internal power switching device.

1.4 Starter battery BATT2 Instruction

1)Working principle of starter battery

The controller trickle charges the BATT2 at 1A constant current. When the voltage
reaches the “Full voltage” during the BATT2 charging process, the controller will
stop charging and exit from constant voltage charging mode.

2) Voltage contol parameters ofstarter battery

CAUTION: Please follow the logic of Full Voltage > Return Voltage when

modifying the voltage point.

3) Start Charging Conditions

CAUTION: BATT2 ONLY supports lead-acid battery type, before starting

the BATT2 charging, please connect the BATT1 first.
Condition1: BATT2 start charging when BATT1 reach the float charging stage and

the BATT2 voltage is lower than the “Charging Return Voltage.

Condition 2:BATT2 start charging when the batteries total charging current is higher

than 3A and the BATT2 voltage is lower than the “Charging Return Voltage.

4) Stop Charging Conditions
Condition 1:BATT2 stops charging when the PV voltage is no ligher 2V than BATT1.
Condition 2:BATT2 stops charging when BATT1 is not in float charging stage and the

total charging current for the battery is less than 2.5A.
Condition 3: BATT2 stops charging when BATT2 reaches the “Full Voltage”.

3

CAUTION: After the BATT2 charging is turned off, it will be recharged only

when the start charging conditions are satisfied again.

5) Starter Battery (BATT2) Charging indication

1.5 AES Signal Output Port Instruction

1)AES port of DR1106/2106/3106N-DDB/DDS

The AES port and the RS485 port are indenpent, the AES port output 12V/200mA and
the voltage is the battery voltage.Connect the refrigerator, refer to the below picture.

2)AES signal port of DR1206/2206/3206/2210/3210N-DDB/DDS

The AES signal port and RS485 port share the power of 5VDC/Max.200mA.,connect the

accessories when connect the refrigerator, refer to the below picture.

4

NOTE:The AES signal port and RS485 port share the power of 5VDC/Max.200mA. The MT11

After the controller is connected with the eBox-WIFI-01 through the
standard Ethernet cable(parallel cable), the operating status and
related parameters of the controller can be monitored by the mobile

APP through WIFI signals.

MT11 can display various operating data and fault information of the
system. The information can be displayed on a backlit LCD screen, the
buttons are easy-to-operate, and the numeric display is
readable.Standard version is for surface mounting, and optional version
is for wall mounting.(Standard version includes the communication
cable)

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(❹) on the controller.

It used to monitor each controller on the network via PC
software. The length of cable is 1.5m. one end connect the ❽
port of controller, the other end connect the PC

power consumption is 13mA when it is ON, and 4mA when it’s off.

3) AES port working principle

 The AES signal turns on after the BATT1 voltage reaches the boost charging

voltage or equalize charging voltage for 5 mins.

 The controller will check if the BATT1 voltage is lower than the boost charging

voltage or equalize charging voltage every 5 mins (This value is the judgement
delay time for turning off the AES signal which can be set via PC software, default
as 5 mins, ranging form 0 to 999 mins) , the AES signal control will be turned off if it
meets the conditions for 5 times.

1.6 Accessories

Accessories(included)：

Local Temperature Sensor (Model:RT-MF58R47K3.81A)

AES signal terminal(Model:3.81-2P)

The 2P cable is recommended for connecting the AES signal port of the car refrigerator.

Accessories(optional)：

1) Remote Meter(Model: MT11)

2) Remote temperature sensor(Model:RTS300R47K3.81A)

3)USB to RS485 converter cable(Model:CC-USB-RS485-150U-3.81)

4)WIFI Serial Adapter(Model:eBox-WIFI-01)

5

5) RS485 to bluetooth adapter(Model:eBox-BLE-01)

After the controller is connected with the eBox-BLE-01 through the
standard Ethernet cable(parallel cable), the operating status and
related parameters of the controller can be monitored by the mobile

APP through Bluetooth signals.

The adapter convers 5V of controller into 12V of the refrigerator, it will
supply the surplus solar power to the refrigerator to avoid energy
waste.

6) AES adapter(Model: AES-ADP)

6

2. Installation

System
voltage

36cell

Voc＜23V

48cell

Voc＜31V

54cell

Voc＜34V

60cell

Voc＜38V

Max.

Best

Max.

Best

Max.

Best

Max.

Best

12V 2 2 1 1 1 1 1 1

24V 2 2 - - - - - -

2.1 Warning

 Be very careful when installing the batteries, especially flooded lead-acid battery.

Please wear eye protection, and have fresh water available to rinse if 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.

 For outdoor installation, keep out of the direct sunshine and rain infiltration.
 Loose 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 application.

 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 battery bank.

 Select the system connection cables according to the current density no greater

than 5A/mm2.

2.2PV 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.

DR1106/2106/3106/1206/2206/3206N-DDB/DDS:

7

System
voltage

72cell Voc＜46V

96cell Voc＜62V

Thin-Film

module

Voc＞80V

Max.

Best

Max.

Best

12V 1 1 - - - 24V 1 1 - -

-

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 Mass 1.5.)

DR2210/3210N-DDB/DDS:

NOTE: The above parameter values are calculated under standard test conditions
(STC(Standard Test Condition): Irradiance 1000W/m2, Module Temperature 25 ℃,
Air Mass 1.5.)
(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 value, which can effectively protect the charging parts of the
controller, and prevent damages to the controller due to the connection of
over-specification PV modules. The actual operation of PV array is as follows:

Condition1,

Actual charging power of PV array ≤ Rated charging power of controller

Condition2,

Actual charging power of PV array ≤ Rated charging power of controller
When the controller operates under“Condition1” or “Condition2”, 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.

power, but the maximum open-circuit voltage of PV array is more than

WARNING: When the power of PV is not greater than the rated charging

8

60V(DR**06N-DDB/DDS)/100V(DR**10N-DDB/DDS)(at the lowest environmental

Model

Rated

Charge

Current

Rated

Charge

Power

Max. PV

Array Power

Max. PV

Open Circuit

Voltage

DR1106N-DDB/DDS

10A

130W/12V

195W/12V

46V①
60V②

DR2106N-DDB/DDS

20A

260W/12V

390W/12V

DR3106N-DDB/DDS

30A

390W/12V

580W/12V

DR1206N-DDB/DDS

10A

130W/12V
260W/24V

195W/12V
390W/24V

DR2206N-DDB/DDS

20A

260W/12V
520W/24V

390W/12V
780W/24V

DR3206N-DDB/DDS

30A

390W/12V
780W/24V

580W/12V

1170W/24V

DR2210N-DDB/DDS

20A

260W/12V
520W/24V

390W/12V
780W/24V

92V①

100V②

DR3210N-DDB/DDS

30A

390W/12V
780W/24V

580W/12V

1170W/24V

temperature), the controller may be damaged.

Condition3,

Actual charging power of PV array ＞ Rated charging power of controller

Condition4,

Actual charging power of PV array ＞ Rate charging current of controller
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 is not greater than the rated charging
power, but the maximum open-circuit voltage of PV array is more than
60V(DR**06N-DDB/DDS)/100V(DR**10N-DDB/DDS)(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
times 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:

①At 25℃ environment temperature.

9

②At minimum operating environment temperature.

Model

Max. PV input

current

Max. PV wire size

DR1106N-DDB/DDS
DR1206N-DDB/DDS

10A

4mm2/12AWG

DR2106N-DDB/DDS
DR2206N-DDB/DDS
DR2210N-DDB/DDS

20A

6mm2/10AWG

DR3106N-DDB/DDS
DR3206N-DDB/DDS
DR3210N-DDB/DDS

30A

10mm2/8AWG

Model

Rated Charge

Current

Battery wire size

DR1106N-DDB/DDS
DR1206N-DDB/DDS

10A

4mm2/12AWG

DR2106N-DDB/DDS
DR2206N-DDB/DDS
DR2210N-DDB/DDS

20A

6mm2/10AWG

DR3106N-DDB/DDS
DR3206N-DDB/DDS
DR3210N-DDB/DDS

30A

10mm2/8AWG

2.3Wire 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 are
connected in series, the Isc if equal to Isc of PV modules. When PV modules are
connected 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

CAUTION: When the PV modules connect in series, the open circuit
voltage of the PV array must not exceed 46V(DR**06N-DDB/DDS),92V
(DR**10N-DDB/DDS).

 Battery and load wire size
The battery and load wire size must conform to the rated current, the reference size

as below:

10

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 size wires can be used to reduce the voltage drop and improve
performance.

CAUTION: For the battery, the recommended wire size 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 solar modules, 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 steps:

11

Step1: Determine of installation location and heat-dissipation space

Determination of installation location: The controller shall be installed in a place with
sufficient air flow through the radiators of the controller and minimum clearance of
150mm from the upper and lower edges to ensure natural thermal convection.

CAUTION: Ensure that the controller is able to dissipate heat if it’s installed in
a closed area. If the controller is to be installed in an enclosed box, it is important to
ensure reliable heat dissipation through the box.

Step2: Wiring❶❷❸
Connect the system in the order of❶Starter batteryBATT2 →❷Main battery

BATT1 →❸PV array in accordance with the above diagram and disconnect
the system in the reverse order❸❷❶.

CAUTION:The BATT1 and BATT2 must be set at same voltage level, and

other situations are not supported for the moment.

CAUTION: Follow the above instruction for wiring, otherwise, it may cause the
BATT2 system voltage identification error.

CAUTION: While wiring the controller do not turn on the breaker or fuse and
make sure that the poles of “+” and “-“ 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 150mm

12

CAUTION: If an inverter is to be connected to the system, connect the inverter

Temperature sensor

Remoter temperature sensor

directly to the battery.
Step3：Grounding❹
DR N series is a common-negative controller, where all the negative terminals of PV

array and battery can be grounded simultaneously or any one of the negative will be
grounded. However, according to the practical application, all the negative terminals
of PV array and battery needn’t to be grounded, but the grounding terminal on
controller’s shell must be grounded, which may effectively shield the electromagnetic
interference from the outside, and prevent some electric shock to the human body due
to the electrification of the shell.

CAUTION:For common-negative systems, such as a motorhome, it is
recommended to use a common-negative controller, but if in the common-negative
system, some common-negative equipment is used, and the positive electrode is
grounded, the controller may be damaged.

Step4: Connect the remote temperature sensor cable❺

(Model:RT-MF58R47K3.81A) （Model:RTS300R47K3.81A）

Connect the remote temperature sensor cable to the port ❹ and place the other end
close to the BATT1.

CAUTION: If the remote temperature sensor is not connected to the controller,
the default temperature for battery charging or discharging is 25℃ without
temperature compensation.

Step5: Connect the remote meter MT11❻ and AES signal of the refrigerator❼
DR1106/2106/3106N-DDB/DDS:

13

DR1206/2206/3206/2210/3210N-DDB/DDS:

❶ RS485 Communication cable
Models：CC-RS485-RS485-3.81-4P-150(Included)
CC-RS485-RS485-3.81-4P-1000(Optional)
CC-RS485-RS485-3.81-4P-2000(Optional)
The operation of the remote meter refer to the user manual of MT11

The controller only provides one AES signal control, and the practical consideration is

needed for the specific application (Check the “1.5 AES Signal output port instruction”

for more information).
Step6: Power on the controller

Firstly, turn on the BATT2 safety switch and check the BATT2 charging indicator
status. then, turn on the BATT1 safety switch and check the BATT1 charging indicator
status (Check the “3. Display Units” for more information). Lastly, turn on the PV array
circuit breaker.

CAUTION: If the controller is not operating properly or the battery indicator on

the controller shows abnormality, please refer to 5.2 “Troubleshooting”.

14

3.Display units

indicator

Color

Status

Instruction

Green

OFF

No charging

Green

Slowly flashing

(1Hz)

Charging, in Boost or Equalize
charging stage

Green

On solid

Full, in Float charging stage

Red

OFF

BATT1 Temperature normal

Red

Fast flashing

(4Hz)

BATT1 over temperature or
BATT1 low temperature

Green

On solid

Connect to BATT1 and in charging

Green

Slowly flashing

(0.2Hz)

Connect to BATT1 and no charging

Green

OFF

Not connect BATT1

Red

On solid

BATT1 over discharged/Low
voltage

Red

OFF

BATT1 low voltage reconnect

Green

On solid

AES signal is ON

Green

OFF

AES signal is OFF

Green

On solid

Connect to BATT2 and in charging

Green

Slowly

flashing(1Hz)

Connect to BATT2 and no charging

3.1DuoRacerDisplay Basic (DDB)

（1）Status indicator

15

Green

OFF

Not connect BATT2

Green

On solid

In the mode of setting battery type

Green

OFF

Settings are saved and quit the
setting mode

All indicatorFast flashing(4Hz)

System voltage error①

All indicatorSlowly flashing(1Hz)

Controller overheating

①The controller don’t recognize the syetem voltage when the battery type is

Indicator

Color

Status

Instruction

Sealed

Green

On solid

12V system

Flashing

24V system

Gel

Red
On solid

12V system

Flashing

24V system

Flooded

Green

On solid

12V system

Flashing

24V system

LiFePO4

Red
On solid

12V system

Flashing

24V system

Li-NiCoMn

Green

On solid

12V system

Flashing

24V system

lithium battery

Indicator "OFF". Indicator "On solid".

Indicator"Slowly flashing (1Hz) ".

Indicator"Slowly flashing (0.2Hz)".

⑵Battery typeindicator

The step of setting battery type：
Step1:Press the button and hold on 3s, green on solid, enter the battery setting

mode.

Step2:Press the button to select the battery type.
Step3:Wait for 5 seconds until the setting indicator turns off. Barrery type is set

successfully.

16

3.2 DuoRacerDisplay Standard (DDS)

Indicator

Color

Status

Instruction

Green

On solid

PV connection normal but the
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 overvoltage

Icon

Instruction

Icon

Instruction

BATT1 battery capacit

①

0～12%

BATT2battery capacity①

0～12%

BATT1battery capacity①

13%～35%

BATT2battery capacity①

13%～35%

BATT1battery capacity①

36%～61%

BATT2battery capacity①

36%～61%

BATT1battery capacity①

62%～86%

BATT2battery capacity①

62%～86%

(1)Charging indicator

(2)Operation interface

17

BATT1battery capacity①

87%～100%

BATT2battery capacity①

87%～100%

Day PV array

Night

BATT1 charging icon

Display the parameters

of PV

BATT2charging icon

Display the parameters

of BATT1

BATT1temperature

parameters

Display the parameters

of BATT2

AES signal icon

Setting icon

Battery type icon

Auto global browsing

icon

Minimum voltage icon

Fault Icon

Maximum voltage icon

① Battery capacity is calculated by the linear relationship between the LVD voltage and float

Fault

Fault

indicator

Charge

indicator

LCD

Instruction

BATT1

overvoltage

Red
Fast

flashing

——

Battery capacity
shows full, battery
frame blink, fault
icon blink.

BATT1

over-discharged

——

——

Battery capacity
shows empty,
battery frame blink,
fault icon blink.

BATT1 over
temperature

Red
Fast

flashing

——

Battery frame blink,
fault icon blink, the
temperature icon
blink.

BATT1

system voltage

error

①

Red
Fast

flashing

Green

Fast

flashing

Battery capacity
shows empty,
battery frame blink.
Fault icon blinks and
battery frame blink

charging voltage.

Fault indication

18

①No alarm for system voltage error when BATT1 is lithium battery.

Press the

button

Parameters of PV array
Parameters of BATT1
Parameters of BATT2
Auto global browsing mode( )

Press the

button

Browse the parameters of PV array
Browse the parameters of BATT1
Browse the parameters of BATT2

Press the
button and
hold on 5s

Select the temperature unit
Select the battery type

(3)Buttons

(1)Auto global browsing mode

Operation:
Press the button until is appear. Then Press the button,

appears. Now it is set as auto global browsing mode.

Loop diaplay：PV voltage →PVcurrent →PV power→Generated energy→BATT1
voltage→BATT1 current→Max. BATT1 voltage→Min.BATT1 voltage →BATT1
temperature→BATT1 battery type→BATT2 voltage→BATT2 current→Max. BATT2
voltage→Min.BATT2 voltage→PVvoltage

19

(2)Change Temperature units

BATT112V Sealed

BATT124V Sealed

BATT112V Gel

BATT124V Gel

Operation:
Step1: Press the button under the battery temperature interface,until the

symbol is flashing.

Step2: Press the button to select the temperature unit.
Step3: Press the button to set successfully.

(3) Clear the generated energy

Press the and button at the same time and hold on for 5s to clear the
generated energy.

(3)Change Battery type

1)Operation:
Step1: Press the button and hold on for 5s under the battery type interface. until

the symbol is flashing.

Step2: Press the button to select the battery type.
Step3: Press the button to confirm the battery type.

2) Battery type

20

BATT112V Flooded

BATT124V Flooded

LiFePO4(4S)

LiFePO4(8S)

Li-NiCoMn (3S)

Li-NiCoMn (6S)

User

CAUTION:The battery control voltage parameters are not changeable when

Battery type

Voltage parameter

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 LimitVoltage

10.6V

10.6V

10.6V

9~17V

Equalize Duration (min.)

120

——

120

0~180

Boost Duration (min.)

120

120

120

10~180

battery is set as default battery types. If you want to change the control parameters,
please set the battery type as “User”.

CAUTION: The control parameters of user battery type can only be set via PC

software or mobile APP.

1) Lead-acid Battery Control Voltage Parameters

The parameters are in 12V system at 25 ºC, please double the values in 24V
system.

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 Reconnect Voltage.

21

1) Lithium Battery Control Voltage Parameters

Battery type
Voltage parameter

LiFePO4(4S)

Li-NiCoMn (3S)

User

Over Voltage Disconnect
Voltage

15.6V

13.5V

9～17V

Charging Limit Voltage

14.6V

12.6V

9～17V

Over Voltage Reconnect
Voltage

14.5V

12.5V

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

Low Voltage Reconnect
Voltage

12.4V

10.5V

9～17V

Under Voltage Warning
Reconnect Voltage

12.5V

11.0V

9～17V

Under Volt. Warning Volt.

12.0V

10.5V

9～17V

Low Volt. Disconnect Volt.

11.0V

9.3V

9～17V

Discharging LimitVoltage

10.8V

9.3V

9～17V

The parameters are in 12V system at 25 ºC, please double the values in 24V
system.

The following rules must be followed when modifying the value of lithium battery.

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 lithium battery can be set, but you

must refer to the voltage parameters of lithium battery BMS.

WARNING: The required accuracy of BMS shall be at least 0.2V. If the
deviation is higher than 0.2V, the manufacturer will assume no liability for any
system malfunction caused by this.

22

4.Protections, Troubleshooting & Maintenance

PV Over
Current/Power

When the charging current or power of the PV array exceeds
the controller’s rated current or power, it will change at the
rated current or power.

PV Short Circuit

When not in the PV charging state, the controller will not be
damaged in case of a short-circuiting in PV array.

PV Reverse Polarity

When the polarity of the PV array is reversed, the controller
may not be damaged and can continue to operate normally
after the polarity is corrected.

NOTE: If the PV array is reverse connected to the controller,1.5
times rated controller power(watts)from the PV array, will
damage the controller.

Night Reverse
Charging

Prevents the battery from discharging to the PV module at night.

BATT1 and BATT2
Reverse Polarity

Fully protected against battery reverse polarity; no damage will occur
to the battery. Correct the miswire to resume normal operation.

NOTE: Limited to the characteristic of lithium battery, when the PV
connection is correct either BATT1 or BATT2 battery connection reversed,
the controller will be damaged.

BATT1 Over Voltage

When the battery voltage reaches the over voltage disconnect
voltage, it will automatically stop battery charging to prevent battery
damagecaused by over-charging.

BATT1 Over
Discharge

When the battery voltage reaches the low voltage disconnect voltage,
it will automatically stop battery discharging to prevent battery
damage caused by over-discharging. (Any controller connected loads
will be disconnected. Loads directly connected to the battery will not
be affected and may continue to discharge the battery.)

BATT1 Overheating

The controller can detect the battery temperature through an external
temperature sensor.The controller stops working when its
temperature exceeds 65 °C and restart to work when its temperature
is below 55 °C.

BATT1Low
Temperature(Lithium
Battery)

When the temperature detected by the optional temperature sensor is
lower than the Low Temperature Protection Threshold(LTPT), the
controller will stop charging and discharging automatically. When the
detected temperature is higher than the LTPT, the controller will be
working automatically (The LTPT is 0 °C by default and can be set
within the range of 10 ~ -40 °C).

Controller Overheating

The controller is able to detect the temperature inside the controller.
The controller stops working when its temperature exceeds 85 °C and
restart to work when its temperature is below 75 °C.

TVSHigh Voltage
Transients

The internal circuitry of the controller is designed with Transient
Voltage Suppressors (TVS) which can only protect against
high-voltage surge pulses with less energy. If the controller is to be
used in an area with frequent lightning strikes, it is recommended to
install an external surge arrester.

Faults phenomenon

Possible reasons

Troubleshooting

Charging LED indicator off
during daytime when sunshine
falls on PV modules properly

PVarray
disconnection

Confirm that PV wire
connections are correct and
tight.

4.1Protections

4.2 Troubleshooting

23

Wire connection is correct,the
controller is not working.

Battery voltage
is lower than

8.5V

Please check the voltage of
battery. At least 8.5V voltage
to activate the controller.

DDS： Red fast flashing
BATT1over
voltage

Check if battery voltage is
higher than OVD(over voltage
disconnect voltage), and
disconnect the PV.
DDB： red on solid

BATT1over
discharged

When the battery voltage is
restored to or above LVR(low
voltage reconnect voltage),
the load will recover

DDS：

DDB： Red fast flashing

BATT1
Overheating

The controller will
automatically turn the system
off. When the temperature
declines to be below 55 ºC,
the controller will resume.

DDS：
DDS： RedFast flashing and

GreenFast flashing

BATT1 System
voltage error

①Check whether the battery
voltage match with the
controller working voltage.
②Please change to a
suitable battery or reset the
working voltage.

①System alarm system
voltage error when using
Lead-acid battery
②System alarm an over
discharge fault when the
③BATT1 is 12V but set as 24V
System alarm an over-voltage
fault when BATT1 is 24V but
set as 12V

Incorrect wiring
steps should
not connect
BATT1 first and
then BATT2

①Disconnect the system,
and reconnect the BATT2
first, then reconnect BATT1
②BATT1 voltage level should
be the same as BATT2

4.3 Maintenance

Battery level
shows full, battery
frame blink, fault
icon blink

Battery level
shows empty,
battery frame
blink, fault icon

Battery level shows current
capacity, battery frame
blink, fault icon blink, the
temperature icon blink

The following inspections and maintenance tasks are recommended at least two
times per year for best controller performance.

 Make sure controller firmly installed in a clean and dry ambient.
 Make sure no block on air-flow around the controller. Clear up any dirt and

fragments on radiator.

24

 Check all the naked wires to make sure insulation is not damaged for serious

solarization, frictional wear, dryness, insects or rats etc. Repair or replace some
wires if necessary.

 Tighten all the terminals. Inspect for loose, broken, or burnt wire connections.
 Check and confirm that LED or LCD is consistent with required. Pay attention to

any troubleshooting or error indication .Take necessary corrective action.

 Confirm that all the system components are ground connected tightly and

correctly.

 Confirm that all the terminals have no corrosion, insulation damaged, high

temperature or burnt/discolored sign, tighten terminal screws to the suggested
torque.

 Check for dirt, nesting insects and corrosion. If so, clear up in time.
 Check and confirm that lightning arrester is in good condition. Replace a new

one in time to avoid damaging of the controller and even other equipments.

WARNING：Risk of electric shock!

Make sure that all the power is turned off before above operations, and then follow the
corresponding inspections and operations.

25

5. Specifications

Item

DR1106N

-DDB/DDS

DR2106N

-DDB/DDS

DR3106N

-DDB/DDS

DR1206N

-DDB/DDS

DR2206N

-DDB/DDS

DR3206N

-DDB/DDS

DR2210N

-DDB/DDS

DR3210N

-DDB/DDS

BATT1 rated voltage

12VDC

12/24VDC

BATT2 rated voltage

12VDC

12/24VDC 自动识别

Rated Charge
Current

10A

20A

30A

10A

20A

30A

20A

30A

Battery Input Voltage
Range

8.5～16V

8.5～32V①

Max. PV Open
Circuit Voltage

60V

②

46V③

100V②

92V③

MPP Voltage Range

(Battery Voltage+2V)～36V

(Battery Voltage+2V)～72V

Rated Charge Power

130W/12V

260W/12V

390W/12V

130W/12V
260W/24V

260W/12V
520W/24V

390W/12V
780W/24V

260W/12V
520W/24V

390W/12V
780W/24V

Max. conversion
efficiency

97.4%

97.5%

98%

97.4%

97.5%

98%

97.5%

98%

Full load efficiency

97%

96%

96%

97%

96%

96%

96%

96%

Self-consumption

12mA/12V;4mA/12V (Low-power mode)

12mA/12V;8mA/24V

4mA/12V;3mA/24V(Low-power mode)

26mA/12V;15mA/24V
19mA/12V;10mA/24V

(Low-power mode)

Temperature
compensate

coefficient④

－3mV/℃/2V(default)

Grounding

Common negative

BATT2Full voltage

13.8V/12V

13.8V/12V；27.6V/24V(default)

BATT2 Charge return
voltage

13V/12V

13V/12V；26V/24V(default)

AES signal port⑤

12VDC/Max.200mA(3.81-4P)

5VDC/Max.200mA(2*(3.81-4P))

RS485 com. port⑤

5VDC/Max.200mA(3.81-4P)

Com. baud rate⑥

115200(default)

LCD backlight time⑦

60S(default)

Electrical Parameters

26

① Warning:When the lithium battery of 12V is used and the BMS is protected, the lithium battery voltage may increase up to 35V which

Item

DR1106/2106/1206/2206/2210N-DDB/DDS

DR3106/3206/3210N-DDB/DDS

Working environment
temperature(100%
input and output)

-20℃～+50℃(DDS)

-30℃～+50℃(DDB)

-20℃～+45℃(DDS)

-30℃～+45℃(DDB)

Storage temperature
range

-30℃～+80℃

Relative humidity

≤95%, N.C

Enclosure

IP33

3-protection against solid objects: protected against solids objects over 2.5mm.

3-protected against sprays to 60°from the vertical.

Pollution degree

PD2

Item

DR1106/1206N-DDB/DDS

DR2106/2206/2210N-DDB/DDS

DR3106/3206/3210N-DDB/DDS

Dimension

227.2×143×58.1mm

243.7×158×63mm

247.2×165×68.5mm

Mounting dimension

160×134mm

180×149mm

180×156mm

Mounting hole size

φ5mm

Terminal

12AWG/4mm2(BATT1)
12AWG/4mm2(BATT2)

6AWG/16mm2(BATT1)
12AWG/4mm2(BATT2)

6AWG/16mm2(BATT1)
12AWG/4mm2(BATT2)

Recommended
cable size

12AWG/4mm2(BATT1)
12AWG/4mm2(BATT2)

10AWG/6mm2(BATT1)
12AWG/4mm2(BATT2)

8AWG/6mm2(BATT1)

12AWG/4mm2(BATT2)

Weight

0.8kg

1.1kg

1.4kg

may damage the load, so please consider the load’s voltage.

② At minimum operating environment temperature.
③ At 25℃ environment temperature.
④ The Temperature compensate coefficient is zero and not changeable when the life battery type is lithium battery.
⑤ AES port which output is 12V/200mA and RS485 Port which output is 5V/200mA are independent of DR1106/2106/3106N models, the

AES port output voltage is the battery voltage. The above two ports of DR1206/2206/3206/2210/3210N models share the power of
5VDC/Max. 200mA

⑥ The communication baud rate can only be set via PC software.
⑦ The LCD backing time can only be set via PC software, setting range is 0~999S and the 0s means the LCD is on all the time.

Environmental Parameters

Mechanical Parameters

27

Annex I Mechanical Dimension Diagram

DR1106/1206N-DDB/DDS (Unit: mm)

28

DR2106/2106/2206/2210N-DDB/DDS (Unit: mm)

29

DR3106/3106/3206/3210N-DDB/DDS (Unit: mm)

Any changes without prior notice! Version number: 1.0

30

HUIZHOU EPEVER TECHNOLOGY CO., LTD.

Tel: [phone]
E-mail：[e-mail]
Website:http://www.epsolarpv.com