About The Spectra HPBC LONGi Solar Panels

About Spectra HPBC LONGi Solar Panels?

Spectra HPBC back-contact high efficiency solar panels are exclusively designed for Marlec and off-grid applications. With efficiency nearly 20% higher than conventional solar panels, they are built using the latest-generation LONGi HPBC solar cells to deliver more power from a compact size.

The panels are built with a rigid aluminium frame, black backsheets and sleek black cells making them stand out from others standard products on the market.

Many of the Spectra HPBC solar panel range all have identical frame lengths making it easy to combine panel sizes to accommodate the space available.

Spectra HPBC Cell Design

HPBC stands for Hybrid Passivated Back Contact, a solar cell architecture pioneered by LONGi.

The design merges advanced passivation techniques with a full back-contact layout, leaving the front surface free of metal grid lines. The absence of front-side metallization improves aesthetics, but more importantly, it enables the cell to capture more photons. The result is higher conversion efficiency and reduces the performance penalty under shade.

Shadow-free front surface: By moving both electrical contacts to the back of the cell, the front surface is entirely clear of obstructions, allowing maximum sunlight to reach the light-absorbing layer.

Enhanced light absorption: A multi-layer anti-reflection film and improved micro-texture uniformity reduce short-wave light reflection, capturing more sunlight and increasing short-circuit current.

Increased open-circuit voltage: The use of self-developed bipolar hybrid passivation technology boosts the open-circuit voltage, contributing to higher overall cell efficiency.

Reduced shading losses and hotspots: Bipolar low-resistance passivation contacts and shading optimizer technology significantly lower power losses from shading by over 70% and reduce hotspot temperatures by 28%.

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