Longi Hi-Mo X6 HTH 540W Black White Mono

LONGi Hi-Mo X6 HTH 540W Black White Mono Solar Panel

The LONGi Hi-Mo X6 HTH 540W (LR5-66HTH-540M) is a high-output monocrystalline solar panel built around LONGi's award-winning HPBC (Hybrid Passivated Back Contact) cell technology. With no visible busbars on the front surface and 66 half-cut cells, this panel delivers an impressive 22.7% module efficiency in a large-format design optimised for commercial and residential rooftop systems requiring maximum power output.

Key Features

• 540W Peak Output — High-wattage module reduces the number of panels required per kWp, lowering balance-of-system and installation costs
• HPBC Cell Technology — Hybrid Passivated Back Contact design eliminates front-side busbars, improving light absorption and delivering a cleaner aesthetic
• 22.7% Module Efficiency — Exceptional output-to-size ratio for residential C&I rooftop applications
• Half-Cell Design — Reduces resistive losses, improves shading tolerance, and lowers the risk of hotspot formation
• Low Degradation — Stable long-term power output with minimal annual efficiency loss
• Excellent Low-Light Performance — Maximises energy yield during early morning, late afternoon, and overcast conditions
• Black & White Aesthetic — Black frame with white backsheet for a clean, professional appearance

Technical Specifications

• Peak Power (Pmax): 540W
• Module Efficiency: 22.7%
• Cell Technology: HPBC Monocrystalline
• Cells: 66 Half-Cut
• Dimensions: 2094mm × 1134mm × 35mm
• Weight: 26kg
• Vmpp: 40.53V | Voc: 48.87V
• Impp: 13.33A | Isc: 14.15A
• Product Warranty: 15 years
• Linear Output Warranty: 25 years
• Product Code: LR5-66HTH-540M

Suitable Applications

• Residential and C&I rooftop installations requiring high power density
• Ground-mount and large-format rooftop systems
• Projects where fewer panels and lower BOS costs are a priority

About LONGi Solar

LONGi is one of the world's largest and most respected solar manufacturers, specialising exclusively in monocrystalline silicon technology. A Tier 1 manufacturer with a global track record across millions of installations, LONGi panels are widely regarded as a benchmark for bankability, quality, and long-term performance.

Please note: due to the physical size of this panel (2094mm length), it is a two-person lift and may require additional care in high winds during installation. Must be installed by a qualified electrician or MCS-accredited installer.