PWM Solar Charge Controller Panel Battery Regulator Dual USB LCD Display12V/24V 30A Features Using industrial grade main control chip Large-screen LCD display, charging and discharging current display; accumulative power generation and discharge power query; temperature display; light control + delay control; charging and discharging parameters adjustable; with power-off memory memory function Suggest: Install the controller as close to the battery as possible to avoid voltage drop caused by too long wires and affect the normal voltage judgment This controller is only suitable for various lead-acid batteries, please do not use other batteries This controller can only use photovoltaic panels as charging source, please do not use tributary or other power sources as charging source The controller will heat up when running, please install the controller on a flat, well-ventilated surface Package Include:1*Solar Panel Controller Note: Due to different personal measurement methods, there will be an error of 2-4 cm, please understand Thanks for your support