ETC series programmable Lithium battery charger is a new generation of high reliability, high performance power supply device for a variety of battery energy storage system. The system adopts the international advanced high frequency switch power supply module in parallel technology. It's monitoring system adopts industrial programmable controller and the man-machine interface adopts industrial color touch screen. The charger has the characteristics of high reliability, high efficiency, high safety, high availability, beautiful appearance, excellent technology, light weight, small size, stable charging, strong earthquake resistance, safe and reliable. The charger has a variety of protection functions such as AC input over voltage and under voltage, DC output over voltage and under voltage, short circuit, over temperature and so on.