Description
The LONGi Hi‑MO 7 590 W is part of LONGi’s latest generation of high-performance solar panels. It uses N‑type (HPDC / high‑performance low‑degradation) cells in a 144‑cell configuration (6×24) offering modern efficiency and stability.
⚡ Electrical & Performance Characteristics
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Rated Maximum Power (Pmax): 590 W under standard test conditions.
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Module Efficiency: Up to ~ 22.8% (depending on exact batch) — among the higher efficiencies for commercially available panels.
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Voltage & Current (typical STC):
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Open‑circuit voltage (Voc): ~ 52.1 V
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Voltage at max power (Vmp): ~ 43.6–43.9 V
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Short‑circuit current (Isc): ~ 14.3–14.4 A
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Current at max power (Imp): ~ 13.5–13.6 A
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Operating Conditions: Works reliably in a broad temperature range (–40 °C to +85 °C), with a favorable temperature‑coefficient (Pmax temperature coefficient ~ –0.28%/°C), helping maintain good performance in hot climates.
🏗️ Mechanical & Build Quality
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Construction: Dual‑glass module (glass front + glass back), with semi‑tempered glass sheets (typically 2.0 mm + 2.0 mm) — enhancing durability, resistance to environmental stress (wind, dust, moisture), and longer lifespan.
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Frame: Anodized aluminum alloy frame for structural strength.
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Dimensions: Around 2278 × 1134 × 30 mm — a standard large‑format panel size.
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Weight: Roughly 31.8–33.5 kg, depending on the exact variant / glass thickness.
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Junction Box / Protection: IP‑rated junction box (IP68), with triple bypass diodes; this ensures better safety and reliability under varied operating conditions.
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Mechanical Load Ratings: Designed to withstand substantial front‑ and rear‑side loads (e.g. wind, snow) as per manufacturer specs.
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Bifacial / Dual‑Glass Advantage: Being bifacial (glass—glass), Hi‑MO 7 panels can capture sunlight from both front and rear surfaces (when installation allows reflection from ground/roof), potentially increasing total energy yield compared to monofacial panels.
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Low Degradation & Long Warranty: The module offers a linear power warranty with slow degradation—typically around 0.4% per year after the first year—helping ensure stable output over decades.
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High Performance under Heat & Low Light: The optimized cell/passivation technology and temperature coefficient help the panel maintain efficiency even in hot climates and varied irradiance—useful for areas with high ambient temperature or strong sunlight (like many parts of Pakistan).
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Reduced BOS (Balance‑of‑System) Costs: High watt-per-panel reduces number of panels needed for a given system size, which lowers mounting hardware, cabling, and installation labor per watt—making the system more cost-efficient.
🔧 Suitability & Use‑Cases
The LONGi Hi‑MO 7 590 W is a strong choice for:
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Residential rooftop systems — especially if roof space is limited but you want decent system capacity.
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Commercial or industrial installations — where higher output and reliability are important.
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Ground‑mounted solar arrays or commercial/utility‑scale projects — where bifacial modules with high output help maximize energy yield per area.
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Hot or harsh climates — due to good temperature tolerance and low degradation, making it suitable for regions like Pakistan, Middle East, Africa, etc.

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