1ENERGY SAVING AND HIGH EFFICIENCY: Advanced MPPT maximum power point tracking technology, the maximum tracking efficiency of 98%, can save panel energy, reduce panel cost. Excellent components are used to improve system performance. The maximum conversion efficiency is 97% 2CLEAR DISPLAY: 4 digit digital tube, real time display panel voltage, charging current, battery voltage, etc., convenient and clear display of charging state. Also allows customers to set the battery voltage and charging parameters freely 3SAFE AND AVOID MISCONTACT: Wide maximum power point of photovoltaic array, operating voltage range of 12V50V. With children lock function, to prevent charging error caused by the wrong touch of the key 4DYNAMIC PARAMETERS: The design of direct display of each parameter, dynamic display of the device operating data and working state, panel voltage, charging current, battery voltage, etc. 5LOW POWER CONSUMPTION: Solar panel power technology, standby power consumption is 0, system power consumption from the panel, does not work at night 6FOR VARIOUS BATTERY TYPES: This product can be applied to a variety of batteries, including lithium battery, lithium iron battery, acid battery, etc. (battery voltage 24V 36V 48V 60V 72V, etc.), with high charging efficiency