working principle The relay functions to automatically close and open the circuit through the live wire. RP1 and RP2 adjustment will affect the working voltage of the relay when it is opened and closed. Charging is powered by the battery, and the voltmeter plays a detection role (pay attention to the connection of the positive and negative electrodes and the live wire during the wiring)
The battery uses the protection board to detect high and low levels for fully automatic management charging. When the battery voltage drops to about 12.V (low voltage adjustable), the protection board automatically recharges, and the shutdown voltage is about 14.8V (the cut-off voltage can be Tune). The red light is on when charging, the red light is off when fully charged, the relay is disconnected, and the 220V input terminal is disconnected for charging, thereby achieving charging protection and energy saving effects.
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