The sun is a renewable energy source that’s free and plentiful. Some people power their entire home with solar energy. A few even sell back the energy to the electricity grid for a profit.

I decided to start small and build my own solar panels to supplement my workshop power needs. Here, I’ll explain in detail how to build a 16.5-volt, 20-watt solar panel.

In the next volume of Make:, I’ll show you how to integrate the solar panel(s) into your electrical system.