... automatically, and when you throw off its load, it will turn on the unit automatically. With battery reverse polarity protection, low-voltage ... , fans, refrigerators, motors, wind generator, solar system and so on,8) 4 steps AVR, 220v+_10%, three steps to increase ... 11) RS232(It can realize software control function)and SNMP Remote ministering ports for option,12) SONCAP certificate,CE certificate and ...