BDTronics brand Good Quality 20A PWM Solar Charge Controller is a high-performance, intelligent solar power management device designed for 12V/24V automatic systems, supporting both lead-acid and lithium batteries. With a dual solar panel input and support for up to 50V PV input voltage, this controller ensures efficient charging, reliable protection, and long battery life. It features an LCD display, dual USB 2A output ports, and an advanced 3-stage PWM charging algorithm, making it ideal for home solar setups, RVs, boats, off-grid systems, and small solar installations.

Built with durable ABS housing, this 20A solar charge controller combines high efficiency with robust protection against overcharge, overdischarge, short circuit, reverse polarity, and temperature fluctuations. The controller automatically detects system voltage (12V/24V), offering optimal charging performance and preventing battery damage through smart voltage and temperature regulation.

Features:

• Automatic Voltage Detection: Supports both 12V and 24V systems with auto-recognition for seamless setup.

• Dual Solar Panel Input: Allows connection of two solar panels for higher charging efficiency and better solar utilization.

• Advanced 3-Stage PWM Charging: Utilizes boost, float, and equalization modes to extend battery life and prevent sulfation or imbalance.

• Supports Multiple Battery Types: Compatible with Lead-Acid (GEL, AGM, Flooded) and Lithium (LiFePO4) batteries.

• Comprehensive Protection:

  • Overcharge and over-discharge protection

  • Short circuit protection

  • Reverse polarity protection

  • Overload and temperature compensation for long-term reliability

• Dual USB Ports: Two 5V/2A USB outputs for charging mobile phones, LED lights, and small DC appliances.

• LCD Display Interface: Large backlit LCD screen shows real-time data such as battery voltage, charging current, load status, and error codes.

• Smart Temperature Compensation: Adjusts charging voltage automatically according to ambient temperature for optimal charging performance.

• Power-Off Memory Function: Retains settings and parameters after power loss for uninterrupted operation.

• High Durability: Industrial-grade design with ABS flame-retardant material ensures stable operation in harsh environments.

• Wide Application Range: Ideal for home solar power systems, RVs, caravans, boats, telecom base stations, street lighting, and off-grid setups.

Specifications:

• Product Type: PWM Solar Charge Controller

• Model: 20A Dual Solar Input Controller

• Material: High-strength ABS Plastic

• System Voltage: 12V / 24V Auto Identification

• Maximum Charge/Discharge Current: 20A

• Maximum PV Input Voltage: 50V (VOC)

• Maximum PV Input Power: 270W (12V), 500W (24V)

• Charging Type: PWM (Pulse Width Modulation)

• USB Output: Dual 5V / 2A ports

• Standby Power Consumption: ≤12mA

• Temperature Compensation: Yes (Automatic)

• Operating Temperature Range: -20°C to +55°C

• Terminal Wire Gauge: 28–10 AWG

• Waterproof Rating: IP32 (Indoor/Protected Outdoor Use)

• Display Type: LCD Screen with Backlight

• Dimensions: 16 x 10 cm (6.3 x 3.9 in)

• Applicable Uses: Solar photovoltaic systems, home energy setups, base stations, RVs, caravans, yachts, solar street lights, off-grid power systems

• Package Includes:

  • 1 x 20A Solar Charge Controller

  • 1 x User Manual

How to Use:

1. Connect the Battery: Always connect the battery first to initialize the controller and detect system voltage.

2. Connect the Solar Panel: Attach the positive and negative terminals of the solar panel to the corresponding controller inputs.

3. Connect the Load: Attach DC lights, fans, or appliances to the load output terminals if needed.

4. Check Display: The LCD will show system status, voltage, and charging mode automatically.

5. Monitor Charging: When sunlight is available, the controller will start charging automatically.

6. USB Output: Plug devices directly into the USB ports for mobile charging.

7. Safety Tip: Avoid reversing polarity and always ensure tight, clean connections for maximum performance.

Applications:

• Solar home lighting systems

• Rural off-grid power systems

• Solar-powered boats and RVs

• Remote monitoring or communication systems

• DC-powered devices and outdoor energy stations

• Battery maintenance systems for solar storage

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