What is HPBC (Hybrid Passivated Back Contact)?
LONGi's back-contact cell technology, used in the Hi-MO X range, offering high efficiency at large scale.
Quick Answer
HPBC reaches the UK mainly through LONGi's Hi-MO X10 range, a premium option that is more widely available and usually cheaper per panel than Maxeon (IBC) or Aiko (ABC). It is a strong pick for buyers wanting back-contact efficiency without the very top-tier price.
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
HPBC (Hybrid Passivated Back Contact) Explained
HPBC (Hybrid Passivated Back Contact) is the back-contact cell technology developed by LONGi, used in its Hi-MO X6 and Hi-MO X10 panels. It moves the electrical contacts to the rear of the cell to remove front-side busbar shading, reaching around 23 to 24 percent efficiency with the latest HPBC 2.0 generation. As the world's largest panel maker, LONGi can produce HPBC at volumes no rival back-contact brand matches, which keeps the price premium smaller than for IBC or ABC.
How Does HPBC (Hybrid Passivated Back Contact) Work in the UK?
HPBC reaches the UK mainly through LONGi's Hi-MO X10 range, a premium option that is more widely available and usually cheaper per panel than Maxeon (IBC) or Aiko (ABC). It is a strong pick for buyers wanting back-contact efficiency without the very top-tier price.
Frequently Asked Questions
What is HPBC solar cell technology?
HPBC (Hybrid Passivated Back Contact) is LONGi's back-contact cell technology, used in its Hi-MO X panels. It moves contacts to the rear to remove front busbar shading, reaching around 23 to 24 percent efficiency with the HPBC 2.0 generation.
Is HPBC better than TOPCon?
HPBC reaches higher peak efficiency than mainstream TOPCon (around 24 percent vs 22 to 23 percent) and has a cleaner all-black look. It costs more, so TOPCon remains better value for many roofs. HPBC suits buyers wanting premium efficiency from a widely available brand.
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John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He researches every battery and inverter brand against manufacturer datasheets, MCS and Ofgem data, and feedback from the MCS-certified installers in our directory before publishing.