Description
The LONGi Hi‑MO 7 / X‑series 645 W panel (model such as LR7‑72HVD‑645M) represents one of the cutting‑edge solar modules for high‑output solar systems.
Key Technical and Performance Features:
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Rated Power (Pmax): 645 W under Standard Test Conditions (STC).
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Module Efficiency: Up to ~ 23.7% to ~ 24.0% (depending on variant / batch), among the higher efficiency classes for modern panels.
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Cell / Build Technology: N‑type monocrystalline cells, with advanced back‑contact or high-performance cell packaging (depending on exact sub‑model). Some variants are bifacial (dual‑glass) allowing energy generation from both front and rear surfaces when there is reflected or ambient light — increasing total yield in favorable installations.
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Electrical Characteristics (typical STC for 645 W module):
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Maximum Power Voltage (Vmp): ~ 44.77 V
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Maximum Power Current (Imp): ~ 14.41 A
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Open‑Circuit Voltage (Voc): ~ 54.12 V
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Short‑Circuit Current (Isc): ~ 15.06 A
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Physical / Mechanical Specs:
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Number of cells: 144 (6 × 24 layout)
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Dimensions: ~ 2382 mm × 1134 mm × 30 mm
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Weight: ~ 33.5 kg
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Junction box: IP68 rated, usually with 3 bypass diodes — supports high durability and weather resistance.Operating temperature range: −40 °C to +85 °C, making it suitable for harsh climates.
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Durability & Warranty: Typically comes with a product/material warranty and a long-term power output warranty such that after 30 years output remains high (manufacturer guarantees around ~88.8% of original output by 30th year).
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Advantages & Real-World Benefits:
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High Power per Panel: At 645 W per panel, you need fewer panels to achieve desired system capacity — which reduces mounting hardware, cabling, installation labour, and total “balance-of-system” (BOS) costs.
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Flexibility — Mono or Bifacial: Bifacial variants (with dual-glass) can capture reflected or ambient light on the rear side, offering extra yield in installations with reflective surfaces or optimal mounting (e.g. ground‑mounted arrays, tilted roofs).
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Efficiency & Climate Suitability: High module efficiency and favorable temperature coefficients (resistance to output drop in hot weather) make these panels well-suited for hot or variable climates.
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Long-Term Reliability: With modern cell technology (N‑type, back-contact / HPBC), good build quality, and long warranty periods, these panels are engineered for decades of operation — making them a good investment for residential, commercial, or utility-scale installations.
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