Why Do Over 95% of Solar Module Frames Use Aluminum?
Dec 29, 2025
In the photovoltaic industry, one statistic often goes unnoticed yet speaks volumes: over 95% of solar module frames worldwide are made from aluminum. Why has aluminum become the undisputed "standard" for PV module framing?
Thermal Compatibility – Aluminum "Breathes" with Glass
Solar modules are essentially glass-semiconductor laminates, and glass expands and contracts with temperature fluctuations. Aluminum's elastic modulus (approximately 69GPa) closely matches that of PV glass. This means the frame and glass expand and contract in unison, minimizing stress concentrations that could otherwise lead to glass micro-cracks or breakage – a challenge that steel frames struggle to address.
25-Year Service Life – Matching the Module's Lifespan
PV mod...
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