Chinese Team Recycles Solar Panels at 9 Grams Per Second

As millions of solar panels reach the end of their 25-year lifespan, researchers in China have invented a breakthrough recycling method that's fast, clean, and remarkably efficient.

A team from Nanjing University of Aeronautics and Astronautics developed a technique that removes the sticky EVA encapsulant (the material protecting solar cells) at 9 grams per second. That's fast enough to process panels at industrial scale while recovering 99% of the valuable materials inside.

Here's how it works: Scientists heat the old panels to 200 degrees Celsius, then use a specialized polishing tool rotating at 1,000 RPMs to gently separate the layers. The process leaves the silicon wafers underneath completely smooth and undamaged, ready to be reused.

The breakthrough solves a major headache for the solar industry. Traditional recycling methods either burn the panels (releasing toxic fumes) or dissolve them in harsh chemicals (creating hazardous waste). This new approach uses pure mechanical force, generating zero chemical waste and no harmful emissions.

The recovered EVA comes off in clean chunks that can be collected and reprocessed into new products. Meanwhile, the silicon wafers stay pristine, maintaining their value for future use.

The research team tested their method on different types of panels, from standard mono-facial modules to newer bi-facial designs. It worked perfectly on all of them, proving the technique can handle the diverse solar panels coming off rooftops and solar farms worldwide.

The Ripple Effect

This innovation arrives at exactly the right moment. The first wave of solar panels installed in the early 2000s is starting to retire now, and that wave will become a tsunami by 2030. Without effective recycling, millions of panels could end up in landfills despite containing valuable silicon, silver, and other materials.

The new method transforms that environmental challenge into an opportunity. By preserving both the silicon and the EVA in reusable condition, it creates a circular economy for solar energy. Today's retired panels become tomorrow's new ones.

The team has already built a pilot production line that proves the concept works beyond the lab. Their adjustable platform gives them precise control over heating temperature, polishing speed, and pressure, letting them fine-tune the process for maximum efficiency.

The simple, elegant solution could reshape how the world handles solar waste, turning an approaching problem into a sustainable advantage.