1. Overview
The EPEVER IT-NC G3 and IT-NC G3 BLE series MPPT solar charge controllers represent a new generation of solar energy management. These controllers are designed to efficiently track the maximum power point of PV arrays, ensuring optimal energy capture from solar panels under various sunlight conditions. Models with 'BLE' in their name include a built-in Bluetooth module, allowing users to monitor and set parameters conveniently via a mobile application.
Key Features:
- Advanced MPPT control algorithm for improved tracking and response speed, minimizing power loss.
- Independent voltage stabilization, allowing direct connection of the battery terminal to the load even without a battery.
- Compatibility with various battery types, including lithium batteries, with comprehensive protection.
- Low static power consumption design for extended system standby time.
- Functions such as charging current limit, charging power limit, and automatic reduction of charging power at high temperatures to ensure system stability.
- Waterproof and dustproof design (IP32, up to IP43 with optional white terminal cover).
- Short-circuit protection and isolated RS485 communication interface for remote monitoring via optional WiFi, Bluetooth, TCP, or 4G modules.
- Configurable communication port for reduced static power consumption.
- Self-adaptive three-stage charging mode to extend battery service life.
- Comprehensive electronic protections: overcharge, overdischarge, PV/battery reverse polarity.
- Supports up to 6 controllers for parallel charging, enabling system capacity expansion.
- Built-in BMS communication port and CAN parallel communication port.
- Real-time data logging, event logging, and energy statistics.
- Remote switch control and dry contact output for generator control.
- All-metal die-casting shell for durability.
- Compliant with IEC62109, UL1741, and EMC (Class B) standards.
2. Product Appearance and Components
Understanding the physical layout of your controller is essential for proper installation and operation. Below is a diagram highlighting the key components and their functions.
Component Identification:
- LCD Display
- Up Button
- Down Button
- Enter Button
- PV1 Terminal (Photovoltaic Input 1)
- PV2 Terminal (Photovoltaic Input 2)
- Battery Terminal
- Load Terminal
- RS485 Communication Port
- CAN Communication Port
- Remote ON/OFF Switch Port
- Relay Port
- Dry Contact Output
- BMS Communication Port
- USB Port (for PC communication)
- Bluetooth Module (for BLE models)
- Cooling Fans
- Mounting Holes
3. Setup and Wiring
Careful wiring is crucial for the safe and efficient operation of your solar charge controller. Please follow these instructions precisely.
General Wiring Diagram:
Important Wiring Notes:
- Ensure that the length of the battery connection cable is less than 3 meters.
- Ensure that the length of the load connection cable is less than 3 meters.
- Ensure that the length of the communication cable is less than 3 meters.
- It is recommended that the length of the PV connection cable is less than 3 meters. If the PV connection cable exceeds 3 meters, it may not meet the requirements of the EN/IEC61000-6-3 standard.
System Wiring Diagram - No Battery Mode:
When operating without a battery, the controller can be directly connected to an inverter. Ensure the inverter is connected to the battery terminals of the controller and meets the specified power conditions.
Conditions for No Battery Mode:
- High-frequency inverter: PV input power > (load output power + inverter conversion efficiency + controller conversion efficiency).
- Industrial frequency inverter: PV input power > (load output power + inverter conversion efficiency + controller conversion efficiency) × 2.
System Wiring Diagram - Battery Mode:
In systems with a battery, any inverter should be connected directly to the battery pack, not to the load terminals of the controller.
WARNING:
If an inverter is used in a system with a battery, connect the inverter directly to the battery pack. DO NOT connect the inverter to the load terminals of the controller!
4. Operating Instructions
The EPEVER IT-NC G3 series controllers are designed for user-friendly operation, offering both manual control via the integrated display and advanced monitoring/configuration through a mobile app for BLE models.
Display and Buttons:
The LCD display provides real-time system status, including PV voltage, battery voltage, charging current, and load status. Use the Up, Down, and Enter buttons (refer to Figure 2) to navigate menus and adjust parameters directly on the controller.
Mobile App (for IT-NC G3 BLE models):
For models equipped with a built-in Bluetooth module (e.g., IT10415NCG3BLE), download the official EPEVER mobile application. This app allows for:
- Real-time monitoring of system performance.
- Viewing historical data and energy statistics.
- Setting and modifying various control parameters.
- Firmware updates (if available).
Charging Modes:
The controller utilizes a self-adaptive three-stage charging mode (Bulk, Absorption, Float) to optimize battery charging and extend battery lifespan. It also features automatic power reduction during high temperatures to protect the system.
Load Control:
Multiple load control modes are available, allowing users to configure when the load is powered. Refer to the controller's menu or the mobile app for specific load control settings.
Communication Ports:
The RS485 and CAN communication ports enable connection to external modules (WiFi, TCP, 4G) for advanced remote monitoring and system integration. The communication port can be enabled or disabled to manage power consumption.
Remote Control and Dry Contact:
The remote ON/OFF switch port allows for external control of the controller. The dry contact output can be used to trigger external devices, such as a generator, based on system conditions.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your EPEVER solar charge controller.
- Visual Inspection: Periodically check all wiring connections for tightness and signs of corrosion. Ensure no cables are frayed or damaged.
- Cleanliness: Keep the controller's exterior clean and free from dust and debris. Pay special attention to the cooling fins and fan vents to ensure proper airflow.
- Ventilation: Ensure the installation area has adequate ventilation to prevent overheating. The controller's cooling fans should operate freely.
- Firmware Updates: For BLE models, regularly check for and apply any available firmware updates via the mobile app to ensure the controller has the latest features and bug fixes.
- Battery Health: Monitor your battery's health and voltage regularly. Ensure battery terminals are clean and secure.
6. Troubleshooting
This section provides guidance on common issues you might encounter with your solar charge controller.
Common Issues and Solutions:
- No Power/Display Off:
- Check battery connections and ensure they are secure and correctly polarized.
- Verify battery voltage is within the controller's operating range.
- Inspect fuses or circuit breakers in the battery circuit.
- No Charging from PV:
- Ensure PV panels are receiving adequate sunlight.
- Check PV array connections for proper polarity and tightness.
- Verify PV input voltage is within the controller's MPPT operating voltage range.
- Inspect fuses or circuit breakers in the PV circuit.
- Load Not Working:
- Check load connections and ensure they are secure.
- Verify load current does not exceed the controller's rated load current.
- Check load control settings on the controller or mobile app to ensure the load is enabled.
- Ensure battery voltage is above the low voltage disconnect (LVD) threshold.
- Bluetooth Connection Issues (BLE models):
- Ensure Bluetooth is enabled on your mobile device.
- Make sure the controller is within range of your mobile device.
- Restart the mobile app and try reconnecting.
- Verify the controller's Bluetooth module is active (refer to the display or specific settings).
- Overheating:
- Ensure the controller is installed in a well-ventilated area.
- Clear any obstructions from the cooling fins and fan vents.
- Reduce system load or PV input if consistently overheating in extreme conditions.
If you encounter persistent issues not covered here, please consult the full user manual (if available) or contact EPever customer support.
7. Specifications
The following table details the technical specifications for the EPEVER IT-NC G3 series MPPT solar charge controllers.
| Parameter | IT10415NCG3BLE | IT10420NCG3 |
|---|---|---|
| Battery Rated Voltage | 12/24/48VDC or Auto | |
| Controller Operating Voltage Range | 8-62V | |
| Battery Type | AGM (Default) / Gel / Flooded / User / LiFePO4 / Li(NiCoMn)O2 | |
| Rated Charging/Discharging Current | 100A | |
| Rated Charging Power | 1,300W/12V; 2,600W/24V; 5,200W/48V | 1,300W/12V; 2,600W/24V; 5,200W/48V |
| Maximum Charging Power | 1,300W/12V; 2,600W/24V; 5,200W/48V | 1,300W/12V; 2,600W/24V; 5,200W/48V |
| Rated Load Current | 100A | |
| Maximum Load Current | 100A | |
| PV Maximum Open-circuit Voltage | 150V (@ lowest temperature) / 138V (@ 25°C) | 200V (@ lowest temperature) / 180V (@ 25°C) |
| MPPT Operating Voltage Range | Battery voltage plus 2V ~ 28V to 103V (@ 25°C) | Battery voltage plus 2V ~ 28V to 144V (@ 25°C) |
| Tracking Efficiency | ≥ 99.5% | |
| Maximum Conversion Efficiency | 98.5% | 98.5% |
| Full Load Efficiency | 98.0% | 97.6% |
| Temperature Compensation Coefficient | -3mV/°C/2V (Default) | |
| Self-consumption (Enabled Communication) | 98mA/12V; 60mA/24V; 46mA/48V | 98mA/12V; 60mA/24V; 46mA/48V |
| Self-consumption (Disabled Communication) | 48mA/12V; 25mA/24V; 14mA/48V | 48mA/12V; 25mA/24V; 14mA/48V |
| Grounding Type | Common negative grounding | |
| Dry Contact (Oil Generator / Utility) | Rated value: 5A/30VDC; Maximum value: 0.5A/60VDC | |
| RS485 Communication Port | 5VDC/200mA (RJ45) | |
| Dimension (Length × Width × Height) | 352 × 263 × 158mm | 352 × 263 × 158mm |
| Mounting Dimension (Length × Width) | 340 × 140mm | |
| Mounting Hole Size | Φ7mm | |
| Wiring Terminal | 2AWG/35mm² | |
| Recommended Cable | 2AWG/35mm² | |
| Net Weight (Controller & White Terminal Cover) | 7.87kg | 7.87kg |
| Net Weight (Controller Only) | 7.63kg | 7.63kg |
| Enclosure | IP32 | |
| Safety | IEC62109-1 | |
| EMC | EN61000-6-1/EN61000-6-3 | |
8. User Tips
Maximize your experience with the EPEVER IT-NC G3 series controller with these practical tips:
- Cable Sizing: Always use the recommended cable sizes (2AWG/35mm²) for PV, battery, and load connections to minimize voltage drop and ensure efficient power transfer. Shorter cable runs are always better.
- Monitor with App: If you have an IT-NC G3 BLE model, regularly use the mobile app for monitoring. It provides detailed insights into your system's performance and allows for easy parameter adjustments.
- Optimal Placement: Install the controller in a cool, dry, and well-ventilated location, away from direct sunlight or heat sources, to prevent overheating and ensure optimal performance of the cooling fans.
- Battery Compatibility: Ensure your battery type is correctly configured in the controller settings. Incorrect settings can lead to improper charging and reduced battery lifespan.
- Parallel Operation: If expanding your system with multiple controllers, ensure they are correctly configured for parallel charging as per the instructions to avoid conflicts and ensure balanced charging.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official EPever website or contact your authorized dealer. Keep your purchase receipt as proof of purchase for any warranty claims.
