This MPPT solar charge controller is designed for solar photovoltaic systems to efficiently coordinate solar panels, batteries, and loads. It features advanced MPPT technology that automatically adjusts the working voltage of solar panels to ensure they operate at the maximum power point throughout the day, significantly improving energy harvest compared to traditional controllers. The controller includes multiple protection functions such as battery reverse polarity protection, low voltage protection, overload and short-circuit protection, and temperature compensation, ensuring safe and reliable system operation. It supports both MPPT and PWM charging modes, with automatic temperature compensation to enhance charging efficiency and extend battery life. Equipped with an LCD screen and user-friendly interface, the controller allows customizable parameter settings, one-key load control, and factory reset function. It enables simultaneous charging and discharging to keep the battery in optimal condition. Available in 20A, 30A, and 40A models, each suited for different solar panel wattages: - MPPT 20A: Compatible with up to 260W (12V) or 520W (24V) solar panels. No USB output. - MPPT 30A: Compatible with up to 380W (12V) or 760W (24V) solar panels. Includes USB 5V output (500mA) for device charging. - MPPT 40A: Compatible with up to 500W (12V) or 1000W (24V) solar panels. Includes USB 5V output (500mA) for device charging. Key features: - LCD display - Easy-to-use interface - MPPT with PWM charging mode - Adjustable parameters - One-key load on/off - Factory reset option - Reverse polarity and reverse discharge protection - Low voltage, overload, and short-circuit protection - Automatic temperature compensation - Simultaneous charge and discharge capability - Improved efficiency by 10%-30% compared to standard controllers - Built-in temperature sensor (NTC 100K) - Timer function with light activation (dusk to dawn control) Specifications: - Max solar panel open circuit voltage: 48V - System voltage: 12V/24V auto-detect - Operating temperature: -10°C to 60°C - Storage temperature: -30°C to 70°C - Humidity: ≤90% non-condensing - Temperature compensation: -4mV/Cell/°C Dimensions: - T20: 142 x 88 x 45 mm - T30: 185 x 90 x 45 mm - T40: 188 x 95 x 45 mm Package includes: - 1 x MPPT Solar Charge Controller - 1 x User Manual - 1 x Temperature Sensor Note: Only MPPT 30A and 40A models include USB charging port. Slight measurement variations may occur due to manual measurement. Product color may vary slightly due to monitor display differences.