... Input Battery Voltage12V/24V12V/24V/48V24V/48VMinimum Start Voltage10V for 12V,20V for 24V,40V for 48VLow Battery Alarm10.5V ... 64V for 48VMax Charging Current70A\35AOver Charge Voltage15.7V for 12V,31.4V for 24V,62.8V for 48VTransfer Efficiency ... mode(green lighting), Alarm(red lighting)Switch selectorSaving Mode is on/off when push the switch forwards/backwards, keeping it horisontal isturning ...