1. Introduction
The EPever XTRA N series solar charge controller utilizes an advanced Maximum Power Point Tracking (MPPT) control algorithm to efficiently manage power from your solar array. This technology minimizes power loss and quickly tracks the maximum power point (MPP) of the PV array, ensuring optimal energy harvesting under various conditions. Compared to traditional PWM charging methods, the XTRA N series can increase the energy utilization ratio in a solar system by 20%-30%.
Key features include limiting charging power and current, and reducing charging power functions to maintain system stability, especially in high-temperature environments. With an IP33 ingress protection rating and an isolated RS485 design, the controller offers enhanced reliability and versatility for diverse applications. The self-adaptive three-stage charging mode, based on a digital control circuit, effectively prolongs battery lifespan and significantly improves overall system performance. Comprehensive electronic protections against overcharge, over-discharge, and PV & battery reverse polarity ensure a reliable and durable solar system. This controller is suitable for RVs, household systems, field monitoring, and other similar applications.
2. Features
- CE certified (LVD EN/IEC62109, EMC EN61000-6-1/3) for safety and electromagnetic compatibility.
- Ensures 100% charging and discharging within the specified working environment temperature range.
- Supports optional LCD display units (XDB1/XDS1/XDS2) for monitoring and configuration.
- Constructed with high-quality, low-failure-rate components from ST or IR for extended service life.
- Advanced MPPT technology with ultra-fast tracking speed, guaranteeing tracking efficiency up to 99.5%.
- Maximum DC/DC transfer efficiency up to 98.3% (for XTRA3415N@48V system), with full load efficiency up to 97.3%.
- Advanced MPPT control algorithm minimizes MPP loss rate and time.
- Accurate recognition and tracking of multi-peak maximum power points.
- Wide MPP operating voltage range.
- Supports various battery types including lead-acid (Sealed, Gel, Flooded) and lithium batteries, with programmable temperature compensation.
- Limits charging power and current to prevent exceeding rated values.
- Real-time energy statistics function.
- Automatic power reduction when internal temperature exceeds safe limits.
- Multiple load work modes: Time Control, Light ON/OFF, and Manual Mode.
- Comprehensive electronic protection features.
- Isolated RS485 communication port with 5V/200mA protected output for devices without external power, utilizing Modbus protocol.
- Supports monitoring and parameter setting via mobile APP or PC software.
- IP33 Ingress Protection: Protected against solid objects larger than 2.5mm and against direct sprays of water up to 60° from the vertical.
3. Product Overview
The EPever XTRA series solar charge controller is designed for robust performance and ease of use. Below are visual representations and descriptions of its physical characteristics and components.
Figure 3.1: Front view of the EPever XTRA series solar charge controller with LCD display and control buttons.
Figure 3.2: Angled front view, highlighting the sleek design and display.
Figure 3.3: Top view showing the various connection terminals for PV, battery, load, and communication.
Figure 3.4: Bottom view displaying the product label with model and serial information.
Figure 3.5: Angled top view providing a clearer look at the terminal block layout.
Figure 3.6: Product Characteristics Diagram
3.1. Component Identification
- RTS* port: Remote Temperature Sensor port.
- PV Terminals: Connects to the solar panel array.
- Battery Terminals: Connects to the battery bank.
- Load Terminals: Connects to DC loads.
- RS485 communication port: For external communication modules or PC connection.
- Terminal protection cover: Provides safety and protection for wiring terminals.
- Display units: LCD screen for status display and parameter settings.
- Mounting Hole Φ5mm: For securing the controller during installation.
Note: If the temperature sensor is short-circuited or damaged, the controller will charge or discharge according to the voltage setting point at the default temperature setting of 25°C (no temperature compensation).
4. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your solar charge controller. Follow these general guidelines for setup. Always refer to the detailed wiring diagram for specific connections.
4.1. Mounting the Controller
- Choose a dry, well-ventilated location away from direct sunlight, high temperatures, and moisture.
- Ensure sufficient clearance around the controller for heat dissipation.
- Mount the controller vertically on a non-flammable surface using the provided mounting holes (Φ5mm).
4.2. Wiring Connections
Follow the wiring sequence carefully to prevent damage to the controller or other components. Ensure all connections are tight and secure.
Figure 4.1: System Connection Diagram
- Connect the Battery: Connect the battery to the controller's battery terminals first. Ensure correct polarity (positive to positive, negative to negative). The controller will automatically detect the system voltage (12V/24V/36V/48V Auto).
- Connect the Solar Panels (PV Array): Connect the solar panel array to the controller's PV terminals. Ensure correct polarity. Verify that the PV open-circuit voltage and power are within the controller's specifications.
- Connect the DC Load: Connect the DC load to the controller's load terminals. Ensure correct polarity.
- Connect the Remote Temperature Sensor (RTS): If using an external temperature sensor (RTS300R47K3.81A), connect it to the RTS port. This provides accurate battery temperature for charging compensation.
- Communication Modules (Optional): The controller supports various communication options via its RS485 port for monitoring and parameter setting:
- eBox-WIFI-01 / eBox-BLE-01: For wireless connection to mobile apps.
- OTG-12CM: For USB connection to mobile apps.
- eLOG01: Data logger for storing system data.
- RS485 to USB cable: For direct connection to a PC for monitoring and configuration software.
- MT50: Remote meter display.
Important: Always connect the battery first, then the solar panels, and finally the load. Disconnect in the reverse order: load, then solar panels, then battery.
5. Operating Instructions
The XTRA series controller offers various operating modes and monitoring capabilities through its LCD display and optional communication modules.
5.1. LCD Display and Control
The integrated LCD display provides real-time system status, charging parameters, and error indications. Use the control buttons (PV+/-, BATT+/-, LOAD+/-, SET, O/ESC) to navigate menus, view data, and adjust settings. The LCD backlight time is 60 seconds by default, but can be adjusted from 0 to 999 seconds (0S for always ON).
5.2. Charging Process
The controller employs a self-adaptive three-stage charging mode (Bulk, Boost, Float, and Equalization for lead-acid batteries) to optimize battery charging and prolong its lifespan. It automatically adjusts charging parameters based on battery type and temperature (if RTS is connected).
5.3. Load Control Modes
The controller supports multiple load work modes to manage DC loads efficiently:
Figure 5.1: Multiple Load Modes
- Time Control: Program specific ON/OFF times for the load.
- Light ON/OFF: The load turns on automatically at dusk and off at dawn.
- Manual Mode: Manually switch the load ON or OFF via the controller buttons or connected communication devices.
5.4. Constant Voltage Output Function
The controller provides a constant voltage output, preventing voltage spikes and ensuring stable power delivery to connected loads or inverters.
Figure 5.2: Constant Voltage Output Function
5.5. Remote Monitoring and Control
Utilize the RS485 communication port with compatible accessories (e.g., eBox-WIFI-01, eBox-BLE-01, OTG-12CM, MT50, PC software) to monitor system performance, view real-time data, and adjust parameters remotely via a mobile application or computer.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your solar charge controller.
- Check Connections: Periodically inspect all wiring connections (PV, battery, load, RTS, communication) for tightness and corrosion. Loose connections can cause overheating and power loss.
- Clean the Controller: Keep the controller's exterior clean and free from dust, dirt, and debris. Use a dry cloth for cleaning. Ensure ventilation openings are not blocked.
- Inspect for Damage: Visually inspect the controller for any signs of physical damage, such as cracks, discoloration, or loose parts.
- Battery Inspection: Regularly check the battery terminals for corrosion and ensure the battery is in good condition. For flooded batteries, check electrolyte levels.
- Environment: Ensure the installation environment remains within the specified temperature and humidity ranges.
7. Troubleshooting
If you encounter issues with your solar charge controller, refer to the following common troubleshooting steps. For detailed error codes and advanced diagnostics, consult the full product manual or contact technical support.
7.1. No Charging or Low Charging
- Check PV Connection: Ensure solar panels are correctly connected to the PV terminals with correct polarity. Verify that there is sufficient sunlight and the PV array is producing voltage.
- Check Battery Connection: Confirm battery is properly connected to the battery terminals with correct polarity. Check battery voltage; if too low, the controller may not initiate charging.
- Check PV Open Circuit Voltage: Ensure the PV open-circuit voltage does not exceed the controller's maximum limit.
- Battery Type Setting: Verify that the correct battery type is selected in the controller settings.
7.2. No Load Output
- Check Load Connection: Ensure the load is correctly connected to the load terminals with correct polarity.
- Check Load Mode: Verify the load control mode (Time Control, Light ON/OFF, Manual) is set appropriately. In Manual Mode, ensure the load is switched ON.
- Battery Voltage: If the battery voltage is below the Low Voltage Disconnect (LVD) setting, the load output will be disconnected to protect the battery.
- Overload/Short Circuit: Check if the load is overloaded or if there is a short circuit. The controller has electronic protection that will disconnect the load in such cases.
7.3. Controller Display Issues
- No Display: Check battery connection and voltage. Ensure the battery has sufficient charge to power the controller's display.
- Incorrect Readings: Verify all sensor connections (e.g., RTS) are secure and functional.
8. Specifications
The following tables detail the electrical, environmental, certification, and mechanical specifications for the EPever XTRA series solar charge controllers.
8.1. Technical Specifications
| Item | XTRA 1206N | XTRA 2206N | XTRA 1210N | XTRA 2210N | XTRA 3210N | XTRA 4210N | XTRA 3215N | XTRA 4215N | XTRA 3415N | XTRA 4415N |
|---|---|---|---|---|---|---|---|---|---|---|
| Electrical | ||||||||||
| System Nominal Voltage | 12/24VDC Auto | 12/24/36/48VDC Auto | ||||||||
| Rated Charge Current | 6A | 10A | 10A | 20A | 20A | 30A | 30A | 40A | 30A | 40A |
| Rated Discharge Current | 6A | 10A | 10A | 20A | 20A | 30A | 30A | 40A | 30A | 40A |
| Battery Voltage Range | 8~16V | 8~32V | 8~68V | |||||||
| Max. PV Open Circuit Voltage | 60V | 100V | 150V | |||||||
| MPPT Voltage Range | (Battery voltage+2V)~36V | (Battery voltage+2V)~72V | (Battery voltage+2V)~108V | |||||||
| Max. PV Input Power (W) | 130/12V, 260/24V | 260/12V, 520/24V | 130/12V, 260/24V | 260/12V, 520/24V | 390/12V, 780/24V | 520/12V, 1040/24V | 390/12V, 780/24V | 520/12V, 1040/24V | 390/12V, 780/24V, 1170/36V, 1560/48V | 520/12V, 1040/24V, 1560/36V, 2080/48V |
| Equalization Voltage | Sealed: 14.6V, Flooded: 14.8V, User: 17-9V | |||||||||
| Boost Voltage | Gel: 14.2V, Sealed: 14.4V, Flooded: 14.6V, User: 17-9V | Gel/Sealed/Flooded: 13.8V, User: 17-9V | ||||||||
| Float Voltage | Gel/Sealed/Flooded: 13.8V, User: 17-9V | |||||||||
| Low Voltage Disconnect Voltage | Gel/Sealed/Flooded: 11.1V, User: 17-9V | |||||||||
| Self-consumption | ≤14mA(12V), ≤15mA(24V) | ≤35mA(12V), ≤22mA(24V), ≤19mA(36V), ≤16mA(48V) | ||||||||
| Discharge circuit voltage drop | ≤0.23V | |||||||||
| Temperature Compensate coefficient | -3mV/℃/2V (Default) | |||||||||
| Grounding | Common negative grounding | |||||||||
| RS485 interface | 5VDC/200mA (RJ45) | |||||||||
| LCD backlight time | 60S (Default) | |||||||||
| Environmental | ||||||||||
| Working environment temperature (full rated power with no derating) | -25℃ ~ +50℃ (LCD), -30℃ ~ +50℃ (No LCD) | |||||||||
| Storage temp. range | -20℃ ~ +70℃ | |||||||||
| Relative humidity | ≤95%, N.C. | |||||||||
| Enclosure | IP33 | |||||||||
| Pollution degree | PD2 | |||||||||
8.2. Certification and Mechanical Specifications
| Item | XTRA 1206N | XTRA 2206N | XTRA 1210N | XTRA 2210N | XTRA 3210N | XTRA 4210N | XTRA 3215N | XTRA 4215N | XTRA 3415N | XTRA 4415N |
|---|---|---|---|---|---|---|---|---|---|---|
| Certification | ||||||||||
| Safety | EN/IEC62109-1 | |||||||||
| EMC (Emission immunity) | EN61000-6-3/EN61000-6-1 | |||||||||
| FCC | 47 CFR Part 15, Subpart B | |||||||||
| Performance & function | IEC62509 | |||||||||
| ROHS | IEC62321-3-1 | |||||||||
| Mechanical | ||||||||||
| Dimension (mm) | 175×143×48 | 217×158×56.5 | 230×165×63 | 255×165×67.8 | 255×187×75.7 | 255×189×83.2 | 255×187×75.7 | 255×189×83.2 | 255×187×75.7 | 255×189×83.2 |
| Mounting dimension (mm) | 120×134 | 160×149 | 173×156 | 200×178 | 200×178 | 200×180 | 200×178 | 200×180 | 200×178 | 200×180 |
| Mounting hole size | Φ5mm | |||||||||
| Terminal | 12AWG (4mm2) | 6AWG (16mm2) | 6AWG (16mm2) | 6AWG (16mm2) | 6AWG (16mm2) | 6AWG (16mm2) | 6AWG (16mm2) | 6AWG (16mm2) | 6AWG (16mm2) | 6AWG (16mm2) |
| Recommended cable | 10AWG (6mm2) | 10AWG (6mm2) | 8AWG (10mm2) | 8AWG (10mm2) | 8AWG (10mm2) | 8AWG (10mm2) | 8AWG (10mm2) | 8AWG (10mm2) | 8AWG (10mm2) | 8AWG (10mm2) |
| Weight | 0.57kg | 0.95kg | 1.31kg | 1.70kg | 2.07kg | 2.47kg | 2.07kg | 2.47kg | 2.07kg | 2.47kg |
9. User Tips
- Verify Model Version: Some models, like the 4415N, may come in different versions (e.g., G3). Always confirm the specific version of your controller for accurate feature and specification reference.
- Battery Type Selection: Ensure you select the correct battery type in the controller settings (Sealed, Gel, Flooded, or Lithium) to ensure optimal and safe charging. Incorrect settings can damage your battery.
- Monitor System Performance: Regularly use the mobile app or PC software to monitor your system's performance. This allows you to track energy production, consumption, and battery status, helping you optimize your solar setup.
- PV Voltage Limits: Pay close attention to the PV open-circuit voltage and MPPT voltage range specified for your model. Exceeding these limits can damage the controller.
- Temperature Compensation: For lead-acid batteries, ensure the remote temperature sensor (RTS) is properly connected and functioning. This allows the controller to adjust charging voltage based on battery temperature, improving battery life and performance.
10. Warranty and Support
For detailed warranty information, including coverage period and terms, please refer to the official EPever website or contact your authorized dealer. Keep your purchase receipt as proof of purchase for any warranty claims.
For technical support, troubleshooting assistance, or service inquiries, please contact the seller or manufacturer directly. Contact information can typically be found on the product packaging, the seller's website, or the manufacturer's official support channels.
