The connection method of the anti-reflux diode is as follows: the diode is generally marked, and the marked direction is connected to the battery, that is, the negative electrode is connected to the battery, and the positive electrode is connected to the solar panel. The diode is anti-reflux. If the connection method is correct, it will not conduct in the reverse direction and cannot form a loop. Therefore, simply connect a diode to the positive electrode of the solar panel. Otherwise, do not connect it backwards. , there will be no output and it cannot reverse the clipping effect. A diode is an electronic device made of semiconductor materials (silicon, selenium, germanium, etc.). A diode has two electrodes, the positive electrode, also called an anode; the negative electrode, also called the cathode. When a forward voltage is applied between the two electrodes of the diode, the diode conducts when uNo reverse voltage is applied. the LED goes out.
The solar panel charges the rechargeable battery. To prevent battery current from flowing backward, it is usually sufficient to connect a rectifier diode in series with the circuit. the one you mentioned is 6 volts and 12 watts. For solar panels, just use 1n4001 series diodes and other series, found in used energy-saving lamps (or 1n5400 series diodes), as shown in the picture:
When connected in series, the solar panels' positive terminal is connected to the positive terminal of the diode, and the negative terminal of the diode is connected to the positive terminal of the battery. The positive and negative poles of the diode are as shown in the figure: