460W Hi-MO X6 Max Explorer HPBC 54 Cell Black Frame MC4-EVO2 SDM1

The LONGi LR7-54HTH-460M-SDM1 is a 54-cell monocrystalline panel built around LONGi's Hybrid Passivated Back Contact (HPBC) cell architecture — a technology that eliminates front-side busbars entirely, reducing shading losses and delivering class-leading efficiency figures at a compact 1,800 × 1,134mm footprint. At 460W with a 22.5% module efficiency and a temperature coefficient of -0.28%/°C, this panel performs particularly well in the variable irradiance conditions typical of UK installations.

The SDM1 variant ships with MC4-EVO2 connectors and is rated to DC 1500V system voltage, making it fully compatible with modern string and hybrid inverter configurations. First-year degradation is held to under 1.5%, with a linear warranty of 0.40%/year thereafter — backed by LONGi's 25-year product and 30-year power output guarantee. MCS certified (BABT 8771) and CE marked, this panel meets all UK grid-connected installation requirements out of the box.

Winner of the 2021 Intersolar Award and a four-time RETC High Achiever, the Hi-MO X6 Max Explorer is field-proven across residential and commercial rooftop projects. The all-black frame suits aesthetics-sensitive installations without compromising on structural integrity or fire rating — LONGi's high-temperature resistance classification adds an additional layer of compliance confidence for installers.

Specifications

Key Features

• HPBC back-contact cell design eliminates front busbars, reducing resistive losses and optical shading for higher energy yield per m²
• 22.5% module efficiency in a 54-cell format — high output without requiring a full 60- or 72-cell panel footprint
• DC 1500V rated — compatible with the full range of contemporary string, hybrid, and utility-scale inverter platforms
• Temperature coefficient of -0.28%/°C minimises summer power roll-off compared to standard PERC panels (-0.35%/°C typical)
• High micro-crack resistance construction reduces degradation risk during transport, handling, and dynamic load cycling
• Enhanced low-light performance delivers measurable generation gains during overcast and dawn/dusk periods
• High-temperature restriction rating contributes to fire safety compliance on both residential and commercial rooftops
• All-black frame and busbar-free front face suit aesthetic-sensitive planning conditions and conservation area installs
• MCS certified and CE marked — fully compliant for UK grid-connected and DNO-approved systems

Installation Notes

Compatible with standard aluminium rail mounting systems at portrait or landscape orientation; refer to LONGi's installation manual for approved clamp positions and load ratings. MC4-EVO2 connectors are cross-compatible with standard MC4 tooling. Ensure string design does not exceed DC 1,500V Voc under minimum site temperature conditions. MCS certificate reference BABT 8771 should be cited on MCS installation documentation.

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