Polycrystalline
Legacy solar cell made from multiple silicon crystals; largely obsolete in 2026 due to lower efficiency (~17-18%).
Detailed Explanation
Polycrystalline (also "multi-crystalline") solar cells are produced by casting molten silicon into blocks, then slicing. Recognizable by bluish color and visible crystal boundaries. Poly dominated the 2010-2018 market but is now largely obsolete for new projects β mono reached cost parity and offers 4-6% higher efficiency. Any 2026 new-project specifications calling for polycrystalline should be questioned. Only surviving niche: budget residential in emerging markets with space constraints.
Further Reading
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