Building your own 5v 3a usb solar charger is simpler than you might think with the right guidance. Campus Component outlines how to combine a solar panel with a voltage regulator and a USB output module for fast and safe charging. This design ensures compatibility with most smartphones and small electronics while maintaining efficiency under varying sunlight conditions. DIY solar char... https://www.campuscomponent.com/blogs/post/build-your-own-5v-3a-usb-solar-phone-charger-for-car