Solar panel recycling's core problem: a cost gap only policy can fix

The solar recycling industry faces a fundamental economic paradox: the materials recovered from end-of-life panels are typically worth less than the cost of collecting, transporting, dismantling and processing them. Philip Kwong, a researcher at the University of Adelaide specialising in PV recycling economics, quantifies this in a study published in Waste Management: recycling a large-format module costs $15–45 in the US, while landfilling the same module costs just $1–5. He estimates comparable gaps exist across other major markets.

Why silver and silicon hold the key

The scale of the coming challenge is substantial. The IEA's Photovoltaic Power Systems Programme estimates global end-of-life module volumes could reach 1.7 million tonnes by 2030 under normal loss scenarios — rising to as much as 8 million tonnes if early failures are factored in. By 2050, the figure could hit 60 million tonnes under baseline projections. Companies like First Solar (for its CdTe thin-film modules), Veolia and Redwood Materials are active in recycling, but none has closed the cost gap for crystalline silicon at industrial scale without regulatory backing.

Europe leads, but the rest of the world lags

Kwong's conclusion is direct: without a reliable policy framework — including mandatory take-back programmes, landfill restrictions, material recovery standards and recycled-content requirements for new modules — the economics will not improve in time to handle the 2030s waste surge. 'The challenge is not chemistry or engineering,' he writes. 'It's that today's solar modules contain too little value per unit of mass, and materials are too tightly bonded, for processing to consistently beat disposal.' Profitability is achievable, but only if the full end-of-life value of the PV ecosystem is systematically captured.