... Voltage Alarm10.4-11/20.8-22Low Voltage shutdown9.7-10.3/19.4-20.6High Voltage Shutdown14.5-15.5 ... .4. Self protection design, when the voltage is lower than 10 v, it would automatically shut off, ensure the battery has ... .Input/output mode diversity: 12 v input, 24 v input, cigarette lighter input, battery direct input; 220 v ac output, 110 v ...