Epever DuoRacer Series Bedienungsanleitung

MPPT Dual Battery Solar Charge Controller

User Manual

DR1106N-DDB/DDS DR1206N-DDB/DDS

DR2106N-DDB/DDS DR2206N-DDB/DDS

DR3106N-DDB/DDS DR3206N-DDB/DDS

DR2210N-DDB/DDS DR3210N-DDB/DDS

Important Safety Instructions

Please reserve this manual for future review.

This manual contains all the safety, installation, and operation instructions for the

DuoRacer series MPPT Dual Battery Solar Charge Controller (referred to as the

controller in the next contents).

Read all the instructions and warnings carefully before installation.

No user-serviceable components exist inside the controller. Do NOT disassemble

or attempt to repair the controller.

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

locations where water can get in.

Install the controller in well-ventilated places; the controller's heat sink may

become very hot during the system operation.

Appropriated external fuses or breakers are suggested.

Please cut off all PV array connections, and disconnect the fuses or breakers

close to the battery before the controller installation and adjustment.

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

loose connection.

 
CONTENTS
General Information 1 
1 Overview 1 
2 Naming Rule 3 
3 Appearance 3 
4 Battery charging stage 4 
5 Starter battery BATT2 6 
6 AES Signal Port 7 
Installation 10 
1 Attentions 10 
2 PV Array Requirements 10 
3 Wire Size 11 
4 Mounting 13 
Display units 17 
1 DuoRacer Display Basic (DDB) 17 
2 DuoRacer Display Standard (DDS) 19 
Others 27 
1 Protections 27 
2 Troubleshooting 28 
3 Maintenance 30 
Specifications 31 
Annex I Dimension Diagrams 34 

1 General Information

1.1 Overview

DuoRacer MPPT charge controller is designed for charging two batteries (shown as

the main battery (BATT1) and starter battery (BATT2) below) at the same time in a

solar system. This controller, supporting multiple main batteries (BATT1), including

Sealed, Gel, Flooded, LiFePO4, and Li-NiCoMn, is suitable for the RV, Camper, Boat,

and so on. The device automatically recognizes the starter battery (BATT2) system

voltage and 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, fast-track the maximum power point

(MPP) of the PV array, and obtain the maximum energy of the solar array under any

conditions. The energy utilization in the MPPT solar system is increased by 20-30%

compared with the PWM charging method.

When there is no operation for a long time and the charging conditions cannot be

satisfied, the controller switches to the low-power mode. It helps reduce

self-consumption and saves the battery power to enhance the product's 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 into the controller, which will

supply thesurplus solar power to the refrigerator to avoid energy waste. The controller

has an 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, ensure the solar system's 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 MPP lost rate and 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.

The 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 operation environmental temperature range.

Optional LED and LCD units.

AES control signal for car refrigerators to avoid energy waste.

Standard Modbus protocol and RS485 (5V/200mA) communication port for the

customer to expand the application area.

①Main battery (BATT1) is the energy storage battery for powering the

household loads in the off-grid system, supporting Sealed, Gel, Flooded,

LiFePO4, and Li-NiCoMn batteries. The controller can NOT automatically

identify the system voltage.

②Starter battery (BATT2), built in the vehicle, is the energy storage battery for

powering systems such as RVs and boats. It only supports a lead-acid

battery, and the controller can automatically identify the system voltage.

CAUTION

The BATT1 and BATT2 must be at the same voltage level.

1.2 Naming Rule

1.3 Appearance

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 charges the BATT1 as default (25℃) 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 batteries, there is no temperature compensation.

⑵For DR1106/2106/3106N models, AES port (outputs 12V/200mA) and RS485

port(outputs 5V/200mA) are independent. The 12V output voltage is the

battery voltage.

For DR1206/2206/3206/2210/3210N models, the AES port and RS485 port

share the power of 5VDC/Max. 200mA.

The AES signal port is designed for car refrigerators supporting the AES

signal. It is built into a power switching device.

1.4 Battery charging stage

Note: The following instructions for the battery charging stage are suitable for

the main battery (BATT1). Charging instructions for the starter battery (BATT2)

refer to chapter 1.5.

The controller has a three-stage battery charging algorithm, including Bulk Charging,

Constant Charging, and Float Charging. The system can extend the battery's lifespan

through the three-stage charging method.

Figure 1-4 Battery charging stage curve

a) Bulk Charging

The battery voltage has not yet reached the constant voltage (Equalize or Boost

Charging Voltage). The controller operates in constant current mode, delivering its

maximum current to the batteries (MPPT Charging). When the battery voltage

reaches the constant voltage set point, the controller will start to operate in constant

charging mode.

b) Constant Charging

When the battery voltage reaches the constant voltage set point, the controller will

start to operate in constant charging mode. The MPPT charging stops during this

process, and the charging current will drop gradually simultaneously. Constant

charging has two stages, namely, equalize charging and boost charging. These two

charging processes are not repeated. Among them, equalized charging starts on the

28th of each month.

Boost Charging

The default duration of the boost charging stage is generally 2 hours. Customers can

adjust the constant time and preset value according to actual needs. The system will

switch to the float charging stage when the duration equals the set value.

Equalize Charging

WARNING

Explosive Risk! Equalizing flooded batteries would produce

explosive gases, so well ventilation of the battery box is

recommended.

CAUTION

Equipment damage!

Equalization may increase battery voltage to the level that

damages sensitive DC loads. Verify that the load's allowable

input voltages are greater than the equalizing charging voltage.

Over-charging and excessive gas precipitation may damage

the battery plates and activate material shedding on them. Too

high an equalized charging or for too long may cause damage.

Please carefully review the specific requirements of the battery

used in the system.

Some battery types benefit from equalizing charging, stirring electrolytes, balancing

battery voltage, and accomplishing chemical reactions. Equalize charging increases

the battery voltage to make it higher than the standard complement voltage, gasifying

the battery electrolyte.

If the controller automatically controls the next charge for equalizing charging, the

equalizing charging time is 120 minutes. Equalize and boost charges are not carried

out constantly in a full charge process to avoid too much gas precipitation or

overheating of the battery.

CAUTION

Due to the installation environment or load work, the system may

not stabilize the battery voltage at a constant voltage. The

controller will accumulate the time when the battery voltage is

equal to the set value. When the accumulative time equals 3

hours, the system will automatically switch to float charging.

If the controller time is not adjusted, the controller will equalize

charging following the inner time.

c) Float Charging

After the constant charging stage, the controller will reduce the battery voltage to the

float charging preset voltage by reducing the charging current. During the floating

charge stage, the battery is charged weakly to ensure that the battery is maintained in

a fully charged state. In the float charging stage, loads can obtain almost all power

from the solar panel. Suppose loads' power exceeds the solar array's power. In that

case, the controller will no longer maintain the battery voltage in the float charging

stage. When the battery voltage goes lower than the boost voltage reconnect voltage,

the system will exit the float charging stage and enter the bulk charging stage again.

1.5 Starter battery BATT2

1) Working principle

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 the constant voltage charging mode.

2) Voltage parameters

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)

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 types. Before starting the

BATT2 charging, please connect the BATT1 first.

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