In this article we will learn how we can build a 5V 3A charger using Solar panel. You can use this charger at any place where power supply is not available. If you are traveling to some remote place and your phone's battery starts to die, but with this your very own DIY solar phone charger, you can use the sun's energy and keep your devices powered, even off the grid. https://www.campuscomponent.com/blogs/post/build-your-own-5v-3a-usb-solar-phone-charger-for-car