Wireless Solar Charger - A wireless solar charger is something that every student can put together, and you will learn a lot from it too. This is a great project for a beginner.
Solar Energy Measurement System – This project will measure parameters like voltage and current in solar cells. The sensors are interfaced with the microcontroller unit.
Off-Grid Solar System - This project allows you to put together a self-contained solar power system. It should be something that can power the home without the need for external power sources.
Dust Removal System for Solar Cells - This project builds a system that can automatically remove that dust, making the system more efficient.
Fresh Water Production System - In this project, you can make a system to desalinate seawater to make fresh drinking water. Powered by solar energy, they can be used anywhere.
Solar Cockroach Vibrobot - You may have seen toys that use simple vibrators to move around the floor like an insect. Making one in the shape of a cockroach makes your own version of this toy.
Solar Night Light - Here’s another good starter project. This asks you to create a night light that lights up a single bulb with stored solar energy at night.
Solar Compass With OLED Display - These compasses use that energy, rather than magnetic energy, to point you in the right direction.
Solar-powered irrigation systems - You'll see these used extensively in agricultural settings, to water farms. You can make a very small scale.