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This 2U rackmount inverter is ideal for providing backup power to your essential equipment such as: telecom, audio/visual and computers. It will generate 3000W of high quality pure sine power at a stable 120Vac output. Power is maintained to your equipment seamlessly through a built in 34 Amp transfer switch with a typical transfer time of less than 20msec. The transfer switch will by-pass city/utility power when it is available, and when city/utility power is lost the inverter will automatically switch to the backup DC power source. In backup mode the inverter will supply power as long as the DC power supply provides enough voltage. Remote monitoring of the inverter is available through an RS232 communication port which affords the user with real-time monitoring of the DC input voltage, AC output voltage, Frequency, and Amps. This inverter is not a -48VDC. To work with -48 Telecom systems, the inverter must be connected directly to the battery bank or positive 48 VDC system. The inverter must bypass the power supply. Features: 3000W continuous power, 48 volt to 120 voltPure sine wave2U Rack Mount InverterFCC Class BRS232 Communication Port - Monitored from a PCInput DC voltageOutput AC voltageFrequency AC CurrentDigital Status Display - ToggleDual AC receptacleOn/off switchUtility Power BypassAutomatic Transfer SwitchOver temperature indicatorOverload protectionLow battery voltage warning/shutdownHigh input voltage protection with automatic shutdownOver load indicatorShort circuit protectionThermal and Load based fanAC output short circuit protectionInstruction manualFree 1 year tech support1 Year Warranty Parts and Labor Specifications: Continuous output power: 3000 WattsSurge power capability (peak power): 6000 Wattsdc input / operating voltage: 41.0 to 60.0 VoltsOutput voltage: 120 Volts acOutput wave form: pure sine waveOutput frequency: 60 HzLow battery voltage shutdown: 40.6 VoltsLow battery voltage recovery: 42.5 VoltsHigh battery shutdown: 61 VoltsHigh battery power return: 59 VoltsNo load power consumption: Fan Off 0.30A dc - Fan On 0.42A dcFrequency: 60hzEfficiency: 91%Over temperature protection low: -4 F 5 FOver temperature protection high: 172 F 5 FTransfer Switch Time: 16-18 msec s FOperating temperature recovery: 136 F (automatic shutdown) 5 FAC Output Socket Type: dual Type 2 -3 prongRS232 Communication PortAC Output and Bypass Protected 34A BreakerFCC Class B - F690501/RF-EMC000377(H)Dimensions: Unit Weight: 27.6 lbs. Unit Size L x W x H: 20.9 x 16.5 x 3.5 inches