First, you need to determine the maximum volts and watts of the solar panel, then decide whether to use a boost circuit or a step-down circuit. The voltage stabilizing device is generally used first as a charging device based on the power of the solar panel. For example, a 12V panel is used to step down and charge a 6V battery, or a 12V panel is connected in series to charge a 12V battery, and then the battery is used for constant current step-down or boost processing . There is one on a certain website, a very cheap adjustable lift module board.
Hello:
——★1. The solar battery with “voltage 20V and current 0.7A in full light” is not suitable for DC voltage stabilization and power supply of electrical appliances. . Because as the light changes, the photocurrent sometimes decreases significantly, affecting the functionning of electrical appliances.
——★2. When using solar panels to generate electricity, they must be equipped with battery storage. Since light changes significantly, photovoltage also fluctuates significantly. The best way is to configure a reasonable storage battery and use constant current charging to charge and store energy.
——★3. Optional battery calculation for a solar battery with “20V voltage and 0.7A current in full light”:
(Based on 0.6A output current); Select battery voltage 12V) Daylight time (hours) × 0.5A÷ 1.5 = battery capacity (Ah). In sunny weather, the battery can be fully charged during the day.