When the battery level drops until only a few minutes of holdup time remain, the alarm will beep, and the LED will flash more rapidly, alerting of impending shutdown. Transfer Times 4 ms typical between AC and inverter. ANSI A scale. Safety and Reliability Features UL and cUL listed, designed to comply with IEC standards. External fuse protects all AC circuits.
Internal fuses protect all DC circuits.
Durable, all-steel chassis withstands transport in hostile environments and operation in any indoor application. Extended warranty available.