1. Introduction
The EPEVER Tracer 4215BN is a 40A Maximum Power Point Tracking (MPPT) solar charge controller designed for 12V/24V automatic system voltage detection. It features advanced MPPT control algorithms and a die-cast aluminum design for efficient heat dissipation. This controller is engineered to accurately track the maximum power point of photovoltaic arrays, optimizing solar energy harvest and improving energy efficiency. It supports various battery types and offers multiple load control modes, making it suitable for diverse applications such as telecommunication base stations, household systems, and caravan setups.
2. Key Features
- Advanced MPPT Technology: Achieves tracking efficiency no less than 99.5% and maximum conversion efficiency of 98%.
- High-Quality Components: Ensures optimal system performance and reliability.
- Automatic PV Input Power Limit: Prevents overload under all circumstances.
- Multiple Load Control Modes: Includes manual control, light ON/OFF, light On+Timer, and time control.
- Battery Type Support: Compatible with Sealed, Gel, Flooded, and User-defined lead-acid battery types.
- Communication Interface: Features RS-485 communication bus interface with Modbus protocol for expanded applications and monitoring.
- Monitoring Capabilities: Supports PC monitoring and external display units like MT52 for real-time data checking and parameter settings.
- Software Upgrade Support: Allows for future enhancements and updates.
- LED Indicators: Provides simple and clear system status indications.
- Battery Temperature Compensation: Optimizes charging based on battery temperature.
- Real-time Energy Statistics: Tracks energy production and consumption.
- Robust Design: Die-cast aluminum for superior heat dissipation and enhanced electronic protection against installation errors or system failures.
3. Product Overview
Familiarize yourself with the components and interfaces of your Tracer 4215BN controller.

Image 3.1: Diagram illustrating the key features and ports of the EPEVER Tracer 4215BN solar charge controller, including the heat sink, RTS port, charging LED indicator, battery LED indicator, button, RS-485 port, solar terminal, battery terminal, and load terminal.

Image 3.2: Close-up view of the RTS (Remote Temperature Sensor) port and the RS-485 communication port on the EPEVER Tracer 4215BN controller.
4. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your solar charge controller. Please follow these steps carefully.
4.1 Safety Precautions
- Ensure all power sources are disconnected before installation.
- Use appropriate tools and wear protective gear.
- Verify correct polarity for all connections to prevent damage.
- Install the controller in a well-ventilated area, away from flammable materials.
- The Tracer-BN series is a negative ground controller. Any negative connection of solar, load, or battery can be earth grounded as required.
- If an inverter is necessary, connect it directly to the battery, not to the controller.
4.2 Wiring Sequence
Connect components to the charge controller in the following sequence. Disconnect in the reverse order.
- Battery: Always connect the battery first to allow the controller to recognize the system voltage. Ensure the battery fuse is installed as close to the battery as possible (within 150mm).
- Solar Panel (PV array): Connect the solar panels to the controller.
- Load: Connect your DC loads to the controller.

Image 4.1: A comprehensive wiring diagram showing the connections between the solar panel, EPEVER Tracer 4215BN controller, battery, inverter, and various loads (DC and AC).
4.3 Installation Steps (Video Guide)
The following video demonstrates the unboxing and connection process for the EPEVER MPPT Solar Charge Controller. While the video may feature a Tracer AN series, the connection principles are largely similar for the Tracer BN series.
Video 4.1: This video provides a visual guide to unboxing, identifying components, and connecting the EPEVER MPPT Solar Charge Controller. It covers connecting the solar panel, battery, load, and temperature sensor, as well as an overview of the LCD display and basic parameter settings.
- Connecting the Battery: (Refer to Video 4.1, timestamp 0:50) Ensure correct polarity (+ to + and - to -) when connecting the battery cables to the controller's battery terminals.
- Connecting the Solar Panel: (Refer to Video 4.1, timestamp 1:04) Connect the solar panel cables to the controller's PV terminals, observing correct polarity.
- Connecting the Load: (Refer to Video 4.1, timestamp 1:15) Connect your DC loads to the controller's load terminals.
- Connecting the Temperature Sensor: (Refer to Video 4.1, timestamp 1:27) Plug the remote temperature sensor into its dedicated port for accurate battery temperature compensation.
5. Operation
The Tracer 4215BN features an intuitive LCD display and buttons for monitoring and configuring system parameters.
5.1 LCD Display Overview
The LCD display shows real-time system status and parameters. Use the 'SELECT' and 'ENTER' buttons to navigate and adjust settings.
- Battery Parameters: (Refer to Video 4.1, timestamp 0:54) View current battery voltage, charging current, and temperature.
- PV Parameters: (Refer to Video 4.1, timestamp 1:11) Monitor solar panel voltage, current, and accumulated energy.
- Load Parameters: (Refer to Video 4.1, timestamp 1:20) Check load status and energy consumption.
5.2 Setting Battery Type
It is essential to set the correct battery type for optimal charging and battery longevity.
- Press the 'ENTER' button and hold for 5 seconds under the battery voltage interface.
- Press the 'SELECT' button when 'BATT. TYPE' interface is flashing to cycle through battery types (Sealed, Gel, Flooded, User).
- Press the 'ENTER' button to confirm the selected battery type.
CAUTION: If 'User' battery type is selected, refer to the detailed user manual for specific battery control voltage settings.
5.3 Setting Load Working Mode
The controller offers various load working modes to suit different application needs.
- Press the 'ENTER' button and hold for 5 seconds under the load mode interface.
- Press the 'SELECT' button when the load mode interface is flashing to cycle through modes.
- Press the 'ENTER' button to confirm the load mode.
Note: Setting Light ON/OFF, Test mode, and Manual mode via Timer1, Timer2 will be disabled and display "2n".
5.4 System Voltage Settings
The controller automatically detects 12V/24V system voltage. For other voltages (36V, 48V), manual configuration may be required depending on the model. Refer to the full user manual for details on setting system voltage and other charging parameters.
5.5 Restoring Factory Settings
To restore the controller to its factory default settings, press and hold the 'SET' and 'ESC' keys simultaneously for 5 seconds on the main page.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your EPEVER Tracer 4215BN controller.
- Cleanliness: Keep the controller clean and free from dust and debris. Use a dry cloth for cleaning.
- Connections: Periodically check all wiring connections for tightness and corrosion. Loose connections can cause overheating and damage.
- Ventilation: Ensure adequate airflow around the controller for proper heat dissipation. Do not block the heat sink fins.
- Environmental Conditions: Verify that the operating environment remains within the specified temperature and humidity ranges.
- Battery Inspection: Regularly inspect your battery for any signs of damage, leakage, or swelling.
7. Troubleshooting
This section provides general guidance for common issues. For detailed error codes and advanced troubleshooting, please consult the comprehensive user manual provided with your product.
- No Display/Power: Check battery connections and ensure the battery is charged. Verify the fuse is intact.
- No Charging: Ensure solar panels are connected correctly and receiving sufficient sunlight. Check PV voltage and current on the display.
- Load Not Working: Check load connections and ensure the load is not exceeding the controller's rated current. Verify the load working mode settings.
- Over-voltage/Under-voltage Alarms: Check battery voltage and ensure it is within the controller's operating range. Adjust battery parameters if necessary.
- Over-temperature: Ensure the controller has adequate ventilation and is not exposed to direct sunlight or excessive heat.
8. Specifications
Key technical specifications for the EPEVER Tracer 4215BN MPPT Solar Charge Controller.

Image 8.1: Comparison table highlighting the differences between Tracer-AN and Tracer-BN series, focusing on heat dissipation, Max PV open circuit voltage, MPP voltage range, and environmental operating temperatures.
| Specification | Value |
|---|---|
| Model | Tracer4215BN |
| Brand | EPEVER |
| Rated Charge Current | 40A |
| System Voltage | 12V/24V Auto Recognition |
| Max. PV Input Voltage | 150V (at minimum operating environment temperature) |
| Max. PV Input Power | 520W (12V) / 1040W (24V) |
| MPP Voltage Range | Battery voltage +2V ~ 108V |
| Battery Type Support | Sealed, Gel, Flooded, User |
| Display Type | LCD |
| Material | Aluminum |
| Item Weight | 6.76 pounds |
| Package Dimensions | 13.98 x 9.45 x 4.37 inches |
| Working Environment Temperature | -35°C ~ +55°C |
| Storage Temperature Range | -35°C ~ +80°C |
| Batteries Required | No (refers to internal batteries, external battery required for operation) |
| UPC | 732376583398 |

Image 8.2: Diagram showing the physical dimensions of the EPEVER Tracer 4215BN controller: Height (H) 64mm, Length (L) 303mm, Width (W) 183mm.
9. Optional Accessories
Enhance the functionality and monitoring capabilities of your Tracer 4215BN controller with these optional accessories:
- Remote Temperature Sensor (RTS300R47K3.81A): Acquires battery temperature for accurate compensation of control parameters.
- USB to RS485 Cable (CC-USB-RS485-150U): Used to monitor the controller via PC software (Solar Station PC software).
- Remote Meter (MT50): Displays various operating data and fault information. Features a backlit LCD screen and easy-to-use buttons.
- WiFi Serial Adapter (eBox-WIFI-01): Connects via Ethernet cable to monitor controller status and parameters via mobile APP through WiFi signals.
- RS485 to Bluetooth Adapter (eBox-BLE-01): Connects via Ethernet cable to monitor controller status and parameters via mobile APP through Bluetooth signals.
- Logger (eLOG01): Records real-time operating data of the controller for monitoring via PC software.
- PT Adapter (PT-ADP): Manages and communicates with multiple controllers (2 to 8 pcs) in parallel.
10. Warranty and Support
For warranty information and technical support, it is recommended to contact your seller or the manufacturer directly. EPEVER products typically come with a standard manufacturer's warranty, but specific terms and duration may vary by region and retailer.
Note: Some users have reported difficulties in obtaining clear warranty information or direct manufacturer support. It is advisable to clarify warranty terms with your point of purchase at the time of purchase.
For frequently asked questions regarding product selection, you may find information on the manufacturer's website or through your seller.







