Description
The LONGi Hi-MO 5 LR5-72HBD 535–555M Bifacial Solar Panel Series is a commercial and utility-grade photovoltaic module line engineered for high-yield power generation setups.
Built on 182mm M10 gallium-doped monocrystalline wafers and 144 half-cut PERC cells (6 × 24 array), this solar panel features a dual-glass bifacial architecture. It absorbs direct solar irradiance on its front glass while capturing reflected light (albedo) from ground, concrete, or roof surfaces on its rear side, boosting total energy gain by up to 10%–25% depending on installation geometry.
In Bangladesh, where commercial electricity tariffs are high and rooftop temperatures rise significantly during summer months, the LONGi Hi-MO 5 LR5-72HBD series offers a robust clean energy solution. Its low temperature power coefficient (-0.34%/°C) ensures stable power output during peak heat conditions, while its dual-glass construction prevents moisture ingress and PID (Potential Induced Degradation) in humid ambient environments.
Key Features
- Bifacial Dual-Glass Architecture: 2.0mm + 2.0mm heat-strengthened glass structure for enhanced rear-side energy harvest and structural strength.
- 182mm M10 Gallium-Doped Wafers: Advanced wafer formulation provides long-term resistance to LID and LeTID efficiency degradation.
- Half-Cut PERC Cell Design: Reduces internal resistive power losses, improves shade tolerance, and minimizes cell micro-crack risks.
- 1500V DC Maximum System Voltage: Supports longer panel strings to lower balance-of-system (BOS) cabling and combiner box costs.
- Heavy Mechanical Load Rating: Certified to withstand 5400 Pa front load (heavy wind/snow) and 2400 Pa rear wind load.
- IP68 Weatherproof Junction Box: Fully potted junction box containing 3 bypass diodes to handle thermal stress and water immersion.
Technical Advantages
- High Efficiency: Delivers up to 21.7% STC module efficiency (555W peak rating), maximizing kilowatt-hour production per square meter.
- Durable Construction: Anodized aluminum alloy frame combined with double tempered glass eliminates moisture-induced cell corrosion.
- Safety Protection: Anti-PID cell technology and fire class certifications ensure operational safety in high-voltage industrial setups.
- Energy Saving: Higher energy yield per watt lowers the Levelized Cost of Energy (LCOE) for long-term power purchase agreements (PPA).
- Easy Maintenance: Smooth dual-glass surface reduces dust accumulation and simplifies routine rainfall self-cleaning.
Applications
- Residential: Large rooftop solar systems, luxury villas, and estate net-metering projects.
- Commercial: Textile mills, retail superstores, shopping centers, corporate headquarters, and cold storage facilities.
- Industrial: Garment factories, manufacturing plants, automated processing units, and logistics warehouses.
- Factory: On-grid factory rooftop solar installations and carport shade structures.
- Office: Commercial tower rooftops, corporate parking shade arrays, and administrative complexes.
- Project Installation: Utility-scale ground-mounted solar farms, agro-voltaic projects, and floating PV arrays.
Technical Specification Table
| Specification | Details |
| Model | LR5-72HBD (535M / 540M / 545M / 550M / 555M) |
| Brand | LONGi |
| Rated Power | 535W – 555W (Pmax at STC) |
| Voltage | Vmpp: 41.50V – 42.10V | Voc: 49.35V – 49.95V |
| Current | Impp: 12.90A – 13.19A | Isc: 13.78A – 14.05A |
| Frequency | Not Applicable (DC System) |
| Efficiency | 20.9% – 21.7% Module Efficiency |
| Protection | IP68 Junction Box, 3 Bypass Diodes, 30A Series Fuse Rating |
| Dimension | 2278 × 1134 × 35 mm |
| Weight | 31.8 kg |
| Operating Temperature | -40°C to +85°C |
| Warranty | Standard Manufacturer Warranty |
Features List
✓ High efficiency operation reaching up to 21.7% module efficiency
✓ Advanced protection system with IP68 enclosure and anti-PID resistance
✓ Long service life backed by a 25-year linear performance warranty
✓ Easy installation with standard 35mm anodized aluminum framing
✓ Low maintenance dual-glass structure with self-cleaning glass surfaces
Benefits For Customers
- Reduces Electricity Cost: Maximizes clean energy generation to lower utility grid bills and support net-metering exports.
- Improves Operational Reliability: Bifacial technology provides consistent power generation even during indirect light or overcast weather.
- Saves Maintenance Cost: Dual-glass framing protects internal cells from moisture, PID, and chemical degradation.
- Suitable for Bangladesh Environment: Performs reliably under high ambient room temperatures and coastal humidity conditions.
Installation & Maintenance Guide
Installation Requirements
- Mount modules on structural steel or aluminum racking engineered to support 31.8 kg per panel and local wind loads.
- Maintain a minimum rear ground clearance (or light-colored rooftop surface) to maximize ground reflection for the bifacial rear side.
- Connect 4 mm² solar cables using MC4-compatible connectors, ensuring correct polarity across string connections.
- Install external DC isolator switches, string fuses (30A rating), and surge protection devices (SPD) before linking to the grid-tied inverter.
Maintenance Tips
- Clean the front and rear glass surfaces periodically using deionized water and soft brushes to remove industrial dust buildup.
- Inspect mounting hardware clamps and frame earthing connections annually to ensure physical security.
- Monitor string voltage and current levels via your solar inverter’s online portal to detect any partial shading issues.
Safety Instructions
- Do not step on solar panel glass or drop heavy tools on the dual-glass structure.
- Cover panel surfaces with opaque material during wiring to prevent high DC voltage electric shocks.
- Installation and electrical commissioning must be conducted by certified solar engineers or qualified technicians.
FAQ Section
Q: What is the price of LONGi Hi-MO 5 LR5-72HBD 535–555M Solar Panel in Bangladesh?
A: You can find updated, competitive pricing for the LONGi Hi-MO 5 LR5-72HBD series directly on loopshop.com.bd, complete with official warranty coverage and engineering support.
Q: Where can I buy LONGi Hi-MO 5 LR5-72HBD 535–555M Solar Panel in Bangladesh?
A: You can purchase authentic LONGi solar panels online at loopshop.com.bd with secure payment options and fast nationwide delivery.
Q: What warranty does this product have?
A: It features a 12-year product materials warranty and a 25-year linear power warranty guaranteeing ≥84.95% power output after 25 years.
Q: Is this suitable for Bangladesh climate?
A: Yes, engineered with a low temperature coefficient (-0.34%/°C) and an IP68 dual-glass structure, it withstands Bangladesh’s heat, rain, and humidity.
Q: How to install this product?
A: Secure the panel onto mounting racking using frame mounting holes or clamps, wire the 4 mm² cables in series/parallel strings, and connect to a compatible 1500V DC inverter.
Q: What is a bifacial solar panel?
A: A bifacial panel generates electricity from both its front side and its rear side by absorbing reflected sunlight from surrounding ground or roof surfaces.
Q: How much additional energy does the bifacial feature generate?
A: Depending on surface reflectivity (albedo) and mounting height, the rear side can boost overall system power generation by 10% to 25%.
Q: Can I use this panel for solar net metering in Bangladesh?
A: Yes, the LONGi Hi-MO 5 series is fully compliant with Bangladesh net-metering guidelines for industrial and commercial rooftop systems.
Q: What inverter voltage is recommended for this panel series?
A: It is designed for high-voltage string inverters supporting up to 1500V DC maximum system voltage.
Q: Does this panel require special cleaning?
A: Standard cleaning with water and soft sponges on the front glass is sufficient; the dual-glass structure reduces dust retention.

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