Core Concept: The fundamental unit of a solar power system that converts sunlight directly into direct current (DC) electricity via the photovoltaic effect.

Structural Components 

• Front Glass: High-transmittance, low-iron tempered glass for impact resistance (e.g., hail protection) and weatherproofing.

• Encapsulant (EVA / POE): Ensures adhesion, electrical insulation, and moisture resistance around solar cells.

• Solar Cells: Core semiconductor unit ($P\text{-}N$ junction) responsible for light-to-electricity conversion.

• Backsheet / Double Glass:

  • Monofacial (Single-glass): Uses durable TPT/PET backsheet; lightweight and cost-effective.

  • Bifacial (Double-glass): Dual tempered glass layers providing superior moisture resistance, lower mechanical degradation, and longer lifespan.

• Aluminum Frame: High-strength anodized aluminum alloy (e.g., AL6005-T5) for mechanical rigidity against wind/snow loads.

• Junction Box: IP67/IP68-rated protection housing bypass diodes to mitigate hot-spot effects caused by shading.