TOPCon Procurement Playbook: Spec, Cost, and Bankability Map
TOPCon (Tunnel Oxide Passivated Contact) n-type cells now hold around 60% of global module market share, with mass-production efficiency of 22.2–23.0% and a temperature coefficient near -0.29%/°C. Procure by site profile, not by headline cost: hot/irradiated sites and bifacial ground-mounts favor TO
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