Technical explanation
Passivation reduces recombination losses. Thermal behavior, efficiency and low-irradiance response depend on the model. Technology alone does not establish better output under cloud.
Definition · Technology
HJTHeterojunction Technology
TL;DR
HJT combines crystalline silicon with thin amorphous silicon layers. Compare offered models rather than assuming annual gains or payback of a premium.
Definition
Silicon heterojunction uses interfaces between crystalline silicon and amorphous layers to form selective contacts and passivate cell surfaces.
⚡
Power
Per datasheet
🌡️
Temperature
Model coefficient
📉
Degradation
Read warranty
💰
Cost
Full quote
Swiss context
Simulate the roof using the compared modules, shading and local temperatures. Compare extra kWh, their value for your demand and full price; a north-facing roof does not automatically justify HJT.
Related terms
Related guides
FAQs — HJT
Is HJT worth the extra cost in Switzerland?+
Check installed premium and simulated extra output. Include warranty, availability and service; three to five years to recover a premium cannot be promised for every project.
Which brand offers the best HJT panels?+
There is no universally best manufacturer. Check technology and the exact model datasheet, then compare warranty and Swiss service in equivalent quotes.
Are HJT panels more heat resistant?+
A less negative power coefficient means a smaller decrease per degree above the reference. Compare actual coefficients and cell temperature; it does not eliminate heat losses.
Sources & method
Check equipment values in the offered model’s datasheet and warranty terms. Confirm grant, permit and connection requirements with the responsible programme, municipality and grid operator.
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Calculate the profitability of your installation
Estimate output, avoided purchases and payback using your data. Confirm the assumptions in a quote.
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