Description
The LONGi Hi‑MO 7 640 W panel belongs to the latest generation of high-performance solar modules from LONGi — engineered to maximize output, minimize degradation, and support larger solar systems with fewer panels. According to the official datasheet for the 640 W+ versions (Hi‑MO X / newer variants), these panels feature the following:
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High Maximum Power (Pmax): 640 W under standard test conditions (STC).
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High Module Efficiency: Typical module efficiency around 23.7% — among the top for commercially available panels in this range.
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Cell Technology & Configuration: Uses advanced N‑type monocrystalline cells with high‑density interconnection / back‑contact or half‑cell‑like layout. The module has 144 cells arranged in a 6 × 24 configuration.Voltage & Current (typical STC):
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Voltage at maximum power (Vmp): ~ 44.36 V
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Current at maximum power (Imp): ~ 14.43 A
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Open‑circuit voltage (Voc): ~ 53.7 V
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Short‑circuit current (Isc): ~ 15.13 A
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Mechanical & Build Quality: The panel is built in a standard large‑format (≈ 2382 × 1134 × 30 mm) frame with anodized aluminum, making it compatible with standard mounting racks and supports.
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Durability & Warranty: The module is designed with low degradation — typical first‑year degradation ~ < 1%, and multi‑year degradation rate around 0.35–0.40%/yr, with a long-term power warranty (e.g., ≥ ~88–89% output after 30 years, depending on model) per manufacturer datasheet.Performance & Cost‑of‑System Advantage: Because each panel yields high wattage per unit area, you’ll need fewer panels to achieve a given system capacity — which reduces installation labour, cabling, mounting structure, and overall balance‑of‑system (BOS) costs.
🔎 Practical Use & Suitability
This 640 W panel is especially suitable when:
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Roof or land area is limited but you want high total system capacity.
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You plan a medium to large solar system (residential estate, commercial building, solar farm) and want to minimize panel count.
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You want a durable, high‑efficiency panel that performs well under varied climatic conditions (temperature tolerance, long lifetime).
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You aim for cost‑effective BOS (i.e. lower mounting, wiring, inverter overhead per watt) — because fewer panels means simpler installation.
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