Charging in the daytime, automatically turning on the lights at night, and automatically turning off the lights at dawn, the output voltage is the output voltage when the battery has no voltage. The circuit controls the output by detecting the change of the voltage generated by the solar panel, without the need for photosensitive elements; it is suitable for a of batteries. The battery voltage of the controller is the output voltage, unlimited current and voltage limiting, 2V3V LED lamp beads cannot be used directly, it needs to be by a step-down constant current or a series current limiting resistor, and the output current is the maximum working current, not constant current Wiring : 1. B+B- connected lithium battery 2. - connect to solar panel 3. L+L- output Wiring sequence: 1: Connect the lithium battery, the battery must have the corresponding protection board 2: Connect to the LED, the lithium battery has power and the LED lights up 3: Connect to the solar panel. At this time, the solar panel is illuminated with light, and the LED is off, and the LED is on without light. The switch can be installed if it needs to be turned off at night or the switch interface SW has been reserved for transportation and storage. Precautions: 1: The stable working output current of the control board cannot be 600ma, otherwise it may cause output protection 2: Charging and anti-backflow without overcharge and overdischarge protection Lithium batteries must be used with corresponding protection boards (mobile phone batteries all have 3.7v protection, and more than 18650 do not have them. 3.7v protection boards cannot be used in series) 3: Pay attention to waterproofing and insulation 4: LED lamps cannot use boost drive Type:2A Colour:Green Material:PCB Size:20x15x4MM Package Contents: 10 * SD1512TA Solar Controller Charging Street Light Switch Circuit Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.