Overview
EPEVER DuoRacer series is an MPPT dual battery solar charge controller designed to charge two batteries (BATT1 and BATT2) in the same solar system. It supports multiple BATT1 battery types including Sealed, Gel, Flooded, LiFePO4, and Li-NiCoMn. The controller automatically recognizes the start battery (BATT2) system voltage and trickle-charges it when conditions are satisfied, making it suitable for RV, camper, caravan, boat, and trailer electrical systems.
The DuoRacer controller uses an advanced MPPT control algorithm to track the maximum power point (MPP) of the PV array and maximize energy harvest under varying conditions. Compared with PWM charging, MPPT energy utilization is increased by 20% to 30%. When there is no manual operation for a long time and charging conditions cannot be reached (PV < 5V), the unit switches to low-power mode to reduce loss and battery power waste. System parameters can be displayed and set via LED/LCD, or via the MT11 remote meter (accessory).
An AES control signal for a car refrigerator is integrated to supply surplus solar power and reduce energy waste. The enclosure is rated IP33 (dust and water spray protection) and includes multiple protections such as battery overcharge protection, over-discharge protection, and reverse connection protection for PV and battery.
Key Features
- MPPT technology with ultra-fast tracking speed; tracking efficiency not less than 99.5% (guaranteed).
- Advanced MPPT algorithm to minimize MPP loss rate and loss time.
- Wide MPP operating voltage range to improve PV module utilization.
- Auto control function of charging power and charging current limitation (BATT1).
- Digital circuit control with adaptive three-stage charging mode to enhance BATT1 life.
- BATT1 type can be set via LED/LCD.
- Low-power mode when charging conditions are not satisfied (PV < 5V) and there is no manual operation for a long time.
- 100% charging and discharging within the specified operating environmental temperature range.
- LED and LCD display versions available (DDB: LED; DDS: LCD).
- AES control signal port for car refrigerator power management.
- Standard Modbus protocol and RS485 (5V/200mA) communication port for system expansion.
For installation support, accessory selection (e.g., remote meter/communication adapters), or compatibility questions, contact https://tsolar.top/ or service@tsolar.top.
Specifications
Technical Specifications
| Item | DR1206N-DDB / DR1206N-DDS | DR2210N-DDB / DR2210N-DDS | DR3210N-DDB / DR3210N-DDS |
|---|---|---|---|
| BATT1 rated voltage | 12/24VDC | ||
| Rated charge current | 10A | 20A | 30A |
| Battery input voltage range | 8.5~32V | ||
| Max. PV open circuit voltage | 60V (at min. operating environment temp.); 46V (at 25 C environment temp.) | 100V (at min. operating environment temp.); 92V (at 25 C environment temp.) | |
| MPP voltage range | (Battery Voltage + 2V)~36V | (Battery Voltage + 2V)~72V | |
| Rated charge power | 130W/12V; 260W/24V | 260W/12V; 520W/24V | 390W/12V; 780W/24V |
| Max. conversion efficiency | 97.40% | 97.50% | 98% |
| Full load efficiency | 97% | 96% | 96% |
| Self-consumption | 12mA/12V; 8mA/24V; 4mA/12V; 3mA/24V (low-power mode) | 26mA/12V; 15mA/24V; 19mA/12V; 10mA/24V (low-power mode) | |
| Temperature compensate coefficient | -3mV/ C/2V (default) | ||
| Grounding | Common negative | ||
| Common negative (parameter) | 13.8V/12V; 27.6V/24V (default) | ||
| BATT2 charge return voltage | 13V/12V; 26V/24V (default) | ||
| AES signal port | 5VDC / Max. 200mA (3.81-4P) | ||
| RS485 com. port | |||
| Com. baud rate | 115200 (default) | ||
| LCD backlight time | 60S (default) | ||
Mechanical Parameters
| Item | DR1206N-DDB / DR1206N-DDS | DR2210N-DDB / DR2210N-DDS | DR3210N-DDB / DR3210N-DDS |
|---|---|---|---|
| Dimension | 227.2 x 143 x 58.1mm | 243.7 x 158 x 63mm | 247.2 x 165 x 68.5mm |
| Mounting dimension | 160 x 134mm | 180 x 149mm | 180 x 156mm |
| Mounting hole size | phi 5mm | ||
| Terminal | 12AWG/4mm2 (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 |
Environmental Parameters
| Item | DR1206/2210N-DDB; DR1206/2210N-DDS | DR3210N-DDB; DR3210N-DDS |
|---|---|---|
| Working environment temperature (100% input and output) | -20 C to +50 C (DDS); -30 C to +50 C (DDB) | -20 C to +45 C (DDS); -30 C to +45 C (DDB) |
| Storage temperature range | -30 C to +80 C | |
| Relative humidity | <=95%, N.C | |
| Enclosure | IP33: 3-protection against solid objects (protected against solid objects over 2.5mm); 3-protected against sprays to 60 B0 from the vertical. | |
| Pollution degree | PD2 | |
Notes
- Temperature compensate coefficient is zero and not changeable when the battery type is lithium battery.
- If the AES signal port and RS485 communication port are used at the same time, total current must be no greater than 200mA.
- Communication baud rate can only be set via PC software.
- LCD backlight time can only be set via PC software; setting range is 0~999S, and 0s means the LCD is on all the time. DDB: DuoRacer Display Basic (LED); DDS: DuoRacer Display Standard (LCD).
Applications
- Dual-battery solar charging systems (house battery + start battery) for RVs, campers, caravans, boats, and trailers
- 12V/24V off-grid PV charging where common-negative grounding is required
- Systems requiring Modbus/RS485 communications and an AES signal output
Video
Details
EPEVER DuoRacer MPPT dual-battery charge controllers support RS485 accessories like the MT11 display, eBox adapters, and optional WiFi monitoring.
The DuoRacer MPPT controller is wired between a roof solar panel and two vehicle batteries, with an MT11 meter connected for monitoring.
