The PWM Solar Charge Controller support 12V/ 24V automatic identification for system voltage. It has different working modes and is suitable for both home and commercial use. Features: Automatic identification for system voltage: 12V/ 24V. The solar controller is suitable for various Specifications of solar panel, applicable to both home and commercial use. Uses brand new electronic components and advanced chip, Features stable performance and low error rate. Different working modes facilitate the solar controller's application to different types of load, such as streets lights and monitoring devices. PWM charging mode improves charging efficiency than ordinary solar controllers and the battery being charging is not easy to get damaged. Multiple protections provide safe use, such as over-charge, over-discharge, overload protection, as well as short circuit and reverse polarity protection. Easy-to-read LCD screen and user-friendly operating keys ensure convenient and intuitive operations. With temperature compensation employed, charging parameters can be automatically adjusted. Selected ABS casing is wear-resistant, anti-impact and weather resistant; aluminum alloy heat sink provides rapid heat dissipation to prolong service life. 5V USB output interface for easily charging smart phone or other electronic devices. Note: Size and color may be slightly different because of manual measurement and different light conditions. Thanks for understanding. Specifications: Rated Current (Charging/ Load): 40A/ 50A/ 60A/ 80A (Optional) Color: Black Material: ABS + Aluminum Alloy Display: Digital LCD Screen System Voltage: 12V/ 24V Auto Charging Mode: PWM Overload Protection: 1.25 x Rated Current, 60S; 1.5 x Rated Current, 5S Short Circuit Protection: 3 x Rated Current No-load Loss: 15mA Charge Loop Drop: 0.26V Discharge Loop Drop: 0.15V Over-voltage Protection: 17V; x2/24V Working Temperature: -35~55 Boost Charging Voltage: 14.6V; x2/24V Direct Charging Voltage: 14.4V; x2/24V Float Charging Voltage: 13.6V; x2/24V Charging Recovery Voltage: 13.2V; x2/24V Temperature Compensation: -5mv//2V Under-voltage Voltage: 12.0V; x2/24V Over-discharge Voltage: 11.1V; x2/24V Over-discharge Recovery Voltage: 12.6V; x2/24V Item Size: 190 * 130 * 60mm / 7.48 * 5.12 * 2.36in Installation Size: 178 * 97mm / 7.01 * 3.82in Package Size: 21 * 14 * 7cm / 8.27 * 5.51 * 2.76in Package Weight: 612g / 1.35lbs Package List: 1 * PWM Solar Charge Controller 1 * User Manual (English)