Undervoltage Control Module Over discharge Switch Battery Charge Controller Module for 6V-60V Battery Product Description This product is suitable for 6-60V battery charging control, can be set free to start charging voltage and stop charging voltage! In the IN input charger 66V voltage, in the OUT terminal battery, for example, set 12V start 15V stop when the voltage is below 12V when the relay is closed to the charger charging voltage to the battery, when the charge voltage is greater than 15V Relay off to stop charging, can be used in household chargers, solar, wind turbines This is a battery automatic charging controller of a 30A relay switch,when low voltage start charging, High voltage stop charging,totally automatically. Fit wide range voltage from 6V - 60V Lead Acid / Lithium / LiFePO4, suitable for all kinds battery,car battery,solar or wind energy system. Setting Instruction: In the setting of numerical normality (digital tube flicker), start button to boost the voltage, stop the button to reduce the voltage. 1>. Set start voltage Under normal display voltage, press the start button to display the starting charging voltage. Long press the start button to stop digital tube flickering. Set the start charging voltage value by start and stop button. 2>. Set stop voltage Under normal display voltage, press the stop button to display the stop charging voltage. Long press the stop button to stop digital tube flickering. Set the stop charging voltage value by start and stop button. 3>. Restoration of original plant Settings: Under normal power, hold the start and stop buttons at the same time, and the digital tube displays 888, that is to restore the original factory setting success. Application: 1>. The new energy battery of solar photovoltaic cells. 2>. Battery and car battery. 3>. Lead-acid batteries, nickel-hydrogen batteries, nickel lithium batteries, lithium ion batteries, polymer batteries, etc. 4>. All kinds of generators to charge the battery.