How Are Solar Panels Recycled?
The rooftop solar panels Blue Raven Solar recommends are monocrystalline silicon panels which are most used in residential solar installations. These panels are made with several recyclable materials, like aluminum, glass, copper wire, and plastic. In fact, glass makes up about 75% of the weight of each panel. The disassembly of panels can be difficult because of the polymer layers sealing the panels to protect them from weather exposure.4
There may be metals like lead and cadmium in solar panels, and silicon is difficult to recycle as well. So, there has been some creative problem solving to make the recycling process more efficient and possible.
There are different methods to recycling solar panels, and most include these three steps:
- Removing the junction box and frame
- Separating the glass and silicon (this can be done through thermal, mechanical, or chemical processes)
- Separating and purifying silicon cells and metals through chemical and electrical processes
With these three steps, recycling researchers can recover most of the solar panel, creating the least amount of waste. Unfortunately, it is not happening on a large scale yet, but solar recycling is a growing practice with massive potential.
To make the process more intuitive and efficient, the recycling process is going to continuing undergoing changes to become more detailed and sophisticated, and solar scientists will likely be making large strides in their technology and in the ability to efficiently recycle solar panels.