Technical explanation
TOPCon describes the contact, not the substrate doping type. Both N-type and P-type TOPCon cells exist. Check efficiency, temperature coefficient and warranty for the offered model.
Definition · Technology
TOPConTunnel Oxide Passivated Contact
TL;DR
TOPCon denotes tunnel-oxide passivated contacts. The architecture does not guarantee the same efficiency, price or operating life for every module.
Definition
TOPCon stands for Tunnel Oxide Passivated Contact. A very thin oxide layer and doped silicon form a selective contact that reduces recombination losses.
⚡
Power
Per datasheet
🌡️
Temperature
Model coefficient
📉
Degradation
Read warranty
💰
Cost
Full quote
Swiss context
Compare required area, simulated output, installed price and Swiss service. LONGi Hi-MO X6 uses HPBC; a brand name does not classify all its ranges as TOPCon.
Related terms
Related guides
FAQs — TOPCon
Is TOPCon better than HJT?+
Compare exact models with a roof simulation. Weigh any premium against expected gains and warranties; the TOPCon or HJT label is insufficient.
What is the lifespan of a TOPCon panel?+
It depends on the product and operation. Distinguish product warranty, power warranty and operating life; a contractual degradation limit does not precisely predict future output.
Are TOPCon panels Pronovo eligible in Switzerland?+
TOPCon technology in itself is not the criterion. Check the exact reference of the module, its certificates and the documents requested for the Pronovo file at the time of the quote.
Sources & method
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