... , ultra-security, flexibility, economy, user-friendly interface, intelligent DYG30 series of electric power inverter, UPS, is a design for the power sector ... or substations are often 110V and 220V DC screen, directly from the screen to get DC power inverter power supply.DC ... + "reliable inverter power source," so as to enhance the reliability of the system. DYG30 series of electric power inverter, UPS