Longi 645W X10 Solar Panel Hi-MO LR8-66HVD Bifacial

LONGi Hi-MO X10 LR8-66HVD-645M 645W Bifacial Solar Panel

The LONGi Hi-MO X10 LR8-66HVD-645M is a 645W bifacial dual-glass solar panel built on LONGi's breakthrough HPBC 2.0 cell technology, reaching a peak module efficiency of 24.8%. Designed for residential and commercial installations across South Africa, it delivers maximum energy yield per square metre against rising Eskom tariffs and persistent loadshedding — making it a standout choice for homeowners and solar installers looking for a long-term, high-performance solution.

Key Features & Specifications:

• N-TaiRay + HPBC 2.0 Cell Technology — LONGi's most advanced cell architecture combines the proprietary N-TaiRay rectangular wafer with the second-generation Hybrid Passivated Back Contact (HPBC 2.0) process, achieving a peak module efficiency of 24.8%. This translates to more usable energy from the same roof area compared to conventional N-type or TOPCon panels.
• 0BB Anti-Shading Design (A+) — The zero-busbar layout eliminates front-side electrical contacts, reducing resistive losses and delivering over 30W in additional yield versus conventional panels. This A+ anti-shading capability ensures strong generation even where partial shading from roof structures or vegetation is unavoidable.
• Bifacial Dual-Glass Construction — Captures both direct and reflected sunlight across front and rear surfaces for boosted real-world yield. The 2.0+2.0mm dual semi-tempered glass build resists UV ageing, moisture ingress, and mechanical stress better than standard backsheet panels — essential durability in South Africa's coastal and highveld climates.
• Localised Overheating Protection — The HPBC 2.0 cell's internal design prevents dangerous hotspot formation that can damage panels and create fire risks on residential rooftops. LONGi describes this as built-in "fire insurance" for the roof — a meaningful safety advantage for close-coupled installations.
• Ultra-Low Degradation Performance — First-year output loss is capped at just 1%, with only 0.35% annual degradation from year 2 through 30. A low temperature coefficient of -0.26%/°C ensures strong output through South Africa's peak summer heat — better real-world performance that compounds over the panel's full lifespan.
• Heavy-Duty Mechanical Resilience — Engineered for South Africa's demanding climate:
  • 5,400 Pa front-side maximum static loading
  • 2,400 Pa rear-side maximum static loading
  • 25 mm hailstone impact resistance at 23 m/s
  • IP68-rated junction box with three bypass diodes

Warranty Protection:

• 30-year extra linear power output warranty
• 15-year warranty for materials and processing
• T&C may apply.

The LONGi Hi-MO X10 LR8-66HVD-645M suits both residential rooftop systems and commercial ground-mounted or flat-roof applications where premium yield, proven safety, and long-term durability are non-negotiable. Whether you are building a grid-tied system to offset Eskom costs or a hybrid installation with battery backup, this panel delivers industry-leading performance over its full 30-year guaranteed life. Contact the Solar & Inverter Warehouse team for compatibility advice or to request a quote.

E&OE. Product specifications are subject to change without notice. Please refer to the official manufacturer datasheet to confirm all specifications before purchase or installation.