Energy Transition
Every crystalline-silicon solar panel — the kind on rooftops and solar farms worldwide — contains silver. It is printed onto each cell as a fine conductive paste, and it is the reason the cell can deliver its current to the outside world. Solar photovoltaics have become the single fastest-growing source of silver demand on record.
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Silver per panel
Roughly 15–25 grams
Function
Current collection paste
Demand trend
Fastest-growing use
Replacement status
Partial, slow
When sunlight knocks electrons loose in a silicon cell, those electrons must be gathered and conducted away with minimal loss. Screen-printed silver paste forms the grid of fingers and busbars on the cell's surface that does exactly that. Silver is used because it conducts better than anything else and forms reliable contacts with silicon at manufacturing temperatures.
Manufacturers are trying — copper plating and silver-coated copper pastes are active development areas, and the industry steadily 'thrifts' less silver per watt each generation. But copper oxidizes, contacts degrade, and efficiency losses cost more than the silver saved in many designs. Newer high-efficiency cell architectures (TOPCon and HJT) actually use more silver per watt than the older PERC standard, which is why total solar silver demand kept rising even as per-cell thrift improved.
The Silver Institute estimates photovoltaics consumed on the order of 200 million ounces in recent years — roughly a fifth or more of total silver demand and climbing. A standard residential panel holds on the order of 15–25 grams; a gigawatt of new solar capacity implies millions of ounces. Sources for this page include the U.S. Geological Survey Mineral Commodity Summaries, the Department of the Interior's 2025 final List of Critical Minerals, the Silver Institute's World Silver Survey, and the International Energy Agency's critical-minerals analysis.
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