Since electricity is one of our basic needs and it doesn’t come for free. In fact it increases every year. Meanwhile sun power is free for all so why not use it? Here is a very simple way to charge your battery using solar power.
Why need a charging circuit?
Solar cells and batteries comes in different voltage and current capacity. You need to match these ratings for safety and reliability reasons. Connecting a higher voltage solar panel to a battery might over charge the battery and may cause it to explode. It is best to limit the voltage and current output of the solar panel to avoid this from happening.