1、Adopt industrial micro controller, charge and discharge parameters can be adjusted. 2、Full 3-stage PWM charge management. 3、Built-in a variety of protection functions including overcurrent, short circuit, open circuit, reverse connection, etc. 4、Large screen LCD display with backlight. 5、Switchable charging function for lithium battery and lead-acid battery. Features: 1. Adopt industrial micro controller, charge and discharge parameters can be adjusted. 2. Full 3-stage PWM charge management. 3. Built-in a variety of protection functions including overcurrent, short circuit, open circuit, reverse connection, etc. 4. Large screen LCD display with backlight. 5. Switchable charging function for lithium battery and lead-acid battery.   Specification: Model (Optional) KYZ-10A KYZ-20A KYZ-30A Batt Voltage 12V/24V self-adapting Charge Current 10A 20A 30A Discharge Current 10A 10A 10A Maximum Solar Input <41V Equalization Lithium battery: 12.8V Lead-acid battery: 14.4V Floating Charge Lithium battery: 12.0V (default, 11.5- 12.8V adjustable) Lead-acid battery: 13.7V (default, 13-15V adjustable) Undervoltage Protection     Lithium battery: 10.7V (default, 9.0- 11.0V adjustable) Lead-acid battery: 10.7V (default, 9.0- 11.5V adjustable) Discharge Reconnect Lithium battery: 11.6V (default, 11.0- 11.7V adjustable) Lead-acid battery: 12.6V (default, 11.5-13V adjustable) Standby Current <10mA USB Output 5V/2A Maximum Operating Temperature -35~60℃ Size 133*70*35mm / 5.2* 2.7* 1.3in Weight Approx. 205g / 7.2oz Tips: All red voltage is only for 12V system, please double it while using 24V system. Package list: 1 * Solar Charge Controller   Note:  1. Make sure your battery has enough voltage for the controller to recognize the battery type before first installation. 2. The battery cable should be as short as possible to minimize loss. 3. The charge controller is only suitable for regulating solar modules. Never connect another charging source to it. 4. The controller will be hot when running. Please install it in a well ventilated place. 5. Please note that the new type and old type of this product will be sent randomly and make sure you will not mind before ordering.