What Is The Difference Between TOPCon, HPBC, HJT, PERC? The differences between TOPCON, HPBC, HJT, and PERC PV Module mainly lie in Solar cell technology, conversion efficiency, process complexity, and cost. 1. Solar Cell technology: TOPCON is a Solar cell technology based on N-type silicon wafers. It utilizes a thin tunnel oxide layer and highly doped polycrystalline silicon film in the metal electrode contact region to form a passivated contact structure, thereby improving power generation efficiency. HPBC is an independently developed cell technology based on N-type silicon wafers by Longi Green Energy Technology Co., Ltd. It adopts high-temperature processes and has a relatively high conversion efficiency.
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