3 pcs Battery Charger Power Relay Control Board DC 12V Automatic Control Board

This power control board will start charging automatically when the battery voltage is as low as 10.5V to 11.5V. And it will power off when the voltage is as high as 14.4V to 14.8V.
The red indicator is lighted on during charging process. It is lighted off when the battery is full charged, the relay off and the 220V input ends to save the energy.
Function:
The transformer of this module maximum power limit is 2KW, battery automatically charging through the module detecting high and low level.
This module is not output without connect with a battery because it has the function of reverse connect protection.
Adjustment:
VR1: The charger will stop charging and the relay will be turned off when the voltage of battery is as high as 14.4V to 14.8V. (Close voltage setting: Adjust clockwise is lower, anti-clockwise is higher.)
VR2: The charger will start charging and the relay will be turned on when the voltage of battery is as low as 10.5V to 11.5V. (Start voltage setting: Adjust clockwise is lower, anti-clockwise is larger.)
Features:
Size: 50*32*18mm
ON voltage: 10.5V-11.5V
OFF voltage: 14.4V-14.8V
Wiring:
You need string either of the 220V line into the COM terminal of the relay, and the OFF terminal (output) into the charger. The charger must use the full bridge rectifier way of output.
The output voltage of DC is about 13.8V-14.4V.
Package includes:
3 PCS Smart Battery Charger Power Relay Control Board DC12V Automatic Control Board