1. Introduction
The EPEVER Tracer3210AN is an advanced Maximum Power Point Tracking (MPPT) solar charge controller designed for off-grid solar systems. It efficiently manages power flow from solar panels to batteries, ensuring optimal charging and extending battery lifespan. This controller supports various battery types, including lead-acid (sealed, AGM, gel, flooded) and lithium batteries, and features an integrated LCD display for monitoring system parameters. It can be expanded with accessories like the MT50 remote meter and a temperature sensor for enhanced control and monitoring.
2. Safety Instructions
- Read all instructions in this manual before installation and operation.
- Do not disassemble or attempt to repair the controller.
- Ensure all wiring is correctly polarized (+/-) to prevent damage.
- Connect the battery first, then the load, and finally the solar panel. Disconnect in reverse order.
- Install the controller in a well-ventilated area, away from flammable materials.
- Wear appropriate personal protective equipment (PPE) during installation.
3. Product Overview
3.1 Main Components

The EPEVER Tracer3210AN kit includes the main MPPT charge controller, an MT50 remote meter for advanced monitoring and settings, and an RTS temperature sensor for accurate battery temperature compensation.
3.2 Features
- High Efficiency: Utilizes advanced MPPT technology for up to 99.5% charging efficiency.
- LCD Screen & RJ45 Port: Front-facing LCD for key parameters and an RJ45 communication port for external modules (MT50, Bluetooth, WiFi, PC Cable).
- Multiple Battery Types: Supports Lead-acid (Sealed, AGM, GEL, Flooded) and Lithium batteries (LiFePO4, Li(NiCoMn)O2, User-defined).
- Comprehensive Protection: Features common negative grounding, low/over voltage input/output protection, overcharge protection, temperature protection, and PV/battery reverse connection protection.
3.3 Physical Description

The controller measures approximately 11.22 inches (285mm) in length, 8.27 inches (164mm) in width, and 3.19 inches (55mm) in height. It features a robust design with a heat sink on the back for efficient heat dissipation.
3.4 Ports and Indicators

- Solar Panel Terminals: For connecting solar array input.
- Battery Terminals: For connecting to the battery bank.
- Load Terminals: For connecting DC loads.
- Temperature Sensor Port: For connecting the external temperature sensor (RTS).
- COM Port (RJ45): For communication with external devices like the MT50 remote meter, Bluetooth, WiFi modules, or PC.
- LCD Display: Shows real-time system data and operating status.
- Select/Enter Buttons: For navigating menus and confirming settings.
4. Setup & Installation
4.1 Wiring Sequence
Always connect the battery first to ensure proper system initialization and protection. Disconnect in reverse order.

- Connect the Battery: Connect the positive and negative terminals of the battery to the corresponding battery terminals on the controller. Ensure correct polarity.
- Connect the Load: Connect the positive and negative terminals of your DC load to the corresponding load terminals on the controller.
- Connect the Solar Panel: Connect the positive and negative terminals of the solar panel array to the corresponding PV terminals on the controller.
- Connect Temperature Sensor (Optional): Plug the RTS temperature sensor into the designated port on the controller. Place the sensor near the battery for accurate temperature compensation.
- Connect Remote Meter (Optional): Connect the MT50 remote meter to the COM port on the controller using an RJ45 cable.
4.2 Visual Installation Guide
For a visual step-by-step guide on unboxing, wiring, and initial setup, please refer to the official product video below:
5. Operating Instructions
5.1 LCD Display Navigation

The controller's LCD display provides real-time information about your solar system. Use the 'SELECT' and 'ENTER' buttons to navigate through different screens and menus.
- SELECT Button: Used to cycle through different display screens (PV parameters, Battery parameters, Load parameters).
- ENTER Button: Used to enter menu settings or confirm selections.
5.2 Monitoring Parameters
The LCD display cycles through various parameters. You can manually switch between them using the 'SELECT' button:
- PV Parameters: Displays solar panel voltage (PV V), current (PV A), and generated energy (kWh).
- Battery Parameters: Shows battery voltage (BATT V), charging current (BATT A), and battery temperature (°C).
- Load Parameters: Indicates load current (LOAD A) and load power (W).
6. Battery Type Configuration
It is crucial to set the correct battery type for optimal charging and battery health. This can be done via the MT50 remote meter or the controller's interface.
6.1 Using the MT50 Remote Meter

To set the battery type, especially for lithium batteries, follow these steps on the MT50:
- Choose 'Control Para' from the main menu.
- Press 'OK'.
- Press 'OK' again to enter the Battery Type setting.
- Use the up/down arrows to select 'User' for custom lithium battery parameters.
- Go on to adjust specific parameters like over voltage disconnect, charge limit, boost charge, float charge, etc.
- Finally, press 'OK' to save your settings.
Supported battery types include:
- Lead-acid: Sealed, AGM, GEL, Flooded
- Lithium: LiFePO4 (4s/12V; 8s/24V), Li(NiCoMn)O2 (3s/12V; 6s/24V), User (9~34V)
7. Maintenance
- Regular Inspection: Periodically check all wiring connections for tightness and corrosion.
- Cleanliness: Keep the controller and its terminals clean and free from dust or debris.
- Ventilation: Ensure the installation area remains well-ventilated to prevent overheating.
- Battery Check: Monitor battery voltage and health regularly, especially for lead-acid batteries requiring maintenance.
8. Troubleshooting
- No Display: Check battery connections and ensure the battery voltage is within the controller's operating range.
- No Charging: Verify solar panel connections, ensure sufficient sunlight, and check for any error codes on the display.
- Load Not Working: Check load connections, ensure the load is not exceeding the controller's rated current, and verify load output settings.
- Error Codes: Refer to the full user manual for a complete list of error codes and their corresponding solutions.
9. Specifications
| Feature | Specification |
|---|---|
| Brand | EPEVER |
| Model | Tracer3210AN |
| Rated Charge Current | 30A |
| Max PV Input Voltage | 100V |
| System Voltage | 12V/24V Auto Recognition |
| Battery Type Support | Lead-Acid (Sealed, Gel, Flooded, AGM), Lithium (LiFePO4, Li(NiCoMn)O2, User) |
| Grounding | Negative Grounded |
| Product Dimensions (L x W x H) | 11.22"L x 8.27"W x 3.19"H (285mm x 164mm x 55mm) |
| Material | Plastic |
| Display Type | LCD |
| Operating Temperature | 25 Degrees Celsius (typical) |
10. Warranty & Support
The EPEVER Tracer3210AN MPPT Charge Controller comes with a 5-year protection warranty. For any technical assistance or inquiries, EPEVER offers 24/7 prompt response support. Please refer to the official EPEVER website or your purchase documentation for detailed warranty terms and contact information.