The 6V 20W solar panel can charge a single lithium battery cell, such as a power bank, LED solar lights, or directly light LED lights.
The maximum charging current of 6V20W solar power can reach about 2A, which is most suitable for charging power banks. It will automatically stop charging when it is full or can be. used with a booster board to increase the 6V voltage. It is suitable for charging more batteries. Actually using 20W6V as DC power supply can expand the application.
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The current generated by the solar panel is measured directly with an ammeter.
The output current of solar panels is different according to different light intensities. To know its current in real time, it is best to measure it with an ammeter.
In addition, there isthe so-called rated current, which is measured under standard light intensity. This will be marked on a label when purchasing solar panels.
See how long it takes to fully charge the battery. Assuming it takes 4 hours to fully charge, then 48/4 = 12 A is required per hour, which means the solar panel charging current is 12 A. ; we know that 18V solar panels are usually used when charging a 12V battery, the power of the solar panel is the voltage.