ET bifacial solar panels represent the pinnacle of photovoltaic innovation, designed to maximize energy yield by harnessing sunlight from both the front and rear sides of the module. Engineered for superior performance in diverse environmental conditions, these panels deliver up to 30% more power generation compared to traditional monofacial panels, thanks to their advanced bifacial technology. Ideal for international trade and large-scale installations, ET bifacial solar panels are manufactured using high-quality N-type TOPCon cells, ensuring exceptional efficiency rates exceeding 22.5%.
With a robust glass-glass structure and IP68-rated junction boxes, ET bifacial solar panels offer unmatched durability against harsh weather, including high winds, snow loads, and PID resistance. These panels are certified to international standards such as IEC 61215, IEC 61730, and UL 61730, making them a reliable choice for commercial, industrial, and utility-scale projects worldwide. Whether deployed in ground-mounted solar farms or rooftop systems, ET bifacial solar panels provide long-term energy savings and a rapid return on investment, positioning them as a top-tier solution for sustainable energy procurement.
| Parameter | ET-72HBD-600W | ET-72HBD-620W | ET-72HBD-640W | ET-72HBD-660W |
|---|---|---|---|---|
| Maximum Power (Pmax) | 600W | 620W | 640W | 660W |
| Module Efficiency | 22.5% | 22.8% | 23.5% | 24.0% |
| Open Circuit Voltage (Voc) | 45.6V | 45.8V | 46.0V | 46.2V |
| Short Circuit Current (Isc) | 17.50A | 17.85A | 18.20A | 18.55A |
| Maximum Power Voltage (Vmpp) | 37.8V | 38.0V | 38.2V | 38.4V |
| Maximum Power Current (Impp) | 15.88A | 16.32A | 16.76A | 17.19A |
| Dimensions (L/W/H) | 2382 x 1134 x 30 mm | 2382 x 1134 x 30 mm | 2382 x 1134 x 30 mm | 2382 x 1134 x 30 mm |
| Weight | 33.2 kg | 33.5 kg | 33.8 kg | 34.0 kg |
| Cell Type | N-Type TOPCon, 182mm Half-Cut, Bifacial | N-Type TOPCon, 182mm Half-Cut, Bifacial | N-Type TOPCon, 182mm Half-Cut, Bifacial | N-Type TOPCon, 182mm Half-Cut, Bifacial |
| Front Glass / Rear Glass | 2.0mm / 2.0mm Tempered Glass | 2.0mm / 2.0mm Tempered Glass | 2.0mm / 2.0mm Tempered Glass | 2.0mm / 2.0mm Tempered Glass |
| Frame | Anodized Aluminum Alloy | Anodized Aluminum Alloy | Anodized Aluminum Alloy | Anodized Aluminum Alloy |
| Junction Box | IP68 Rated, 3 Diodes | IP68 Rated, 3 Diodes | IP68 Rated, 3 Diodes | IP68 Rated, 3 Diodes |
| Cable | 4.0mm², 300mm (Customizable) | 4.0mm², 300mm (Customizable) | 4.0mm², 300mm (Customizable) | 4.0mm², 300mm (Customizable) |
| Mechanical Load | 5400Pa / 2400Pa | 5400Pa / 2400Pa | 5400Pa / 2400Pa | 5400Pa / 2400Pa |
| Temperature Coefficient (Pmax) | -0.30%/°C | -0.30%/°C | -0.30%/°C | -0.30%/°C |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| Warranty | 12-Year Product / 30-Year Linear Power | 12-Year Product / 30-Year Linear Power | 12-Year Product / 30-Year Linear Power | 12-Year Product / 30-Year Linear Power |
Note: Specifications are subject to change without notice. Bifacial gain depends on installation environment. Certifications: IEC 61215:2016, IEC 61730:2016, UL 61730, CE, INMETRO.

ET bifacial solar panels excel in a wide array of deployment scenarios, leveraging their dual-sided light capture for optimal performance. In utility-scale solar farms, they are mounted on elevated trackers or fixed-tilt systems over high-albedo surfaces like white gravel or reflective membranes, achieving substantial energy gains in regions with diffuse light such as Europe and North America.
For commercial rooftops, ET bifacial solar panels integrate seamlessly with flat or sloped surfaces, benefiting from ground reflections even in urban settings. They are particularly advantageous in agrivoltaic projects, where panels are installed above crops, allowing light to pass through to vegetation while generating power from both sides.
In snowy or desert environments, these panels' self-cleaning glass and high wind resistance make them ideal for ground-mounted arrays. Floating solar installations also benefit from water reflections, enhancing yields by up to 25%. Additionally, ET bifacial solar panels support off-grid applications in remote industrial sites, providing reliable power for mining operations, oil fields, and telecommunications towers across Asia, Africa, and Latin America.
Choosing ET bifacial solar panels offers distinct advantages over conventional modules. The bifacial architecture significantly increases energy production without expanding footprint, reducing levelized cost of electricity (LCOE) by 10-20%. Their N-type cells exhibit minimal degradation, first-year loss under 2% and annual under 0.4%, ensuring a lifespan exceeding 30 years with over 84.8% output retention.
Superior temperature coefficients and low-light performance maintain high efficiency in hot climates or cloudy conditions, outperforming competitors. The glass-glass design provides enhanced UV and ammonia resistance, perfect for coastal or agricultural installations. ET bifacial solar panels also feature advanced shading tolerance due to half-cut cells, minimizing output losses in partially shaded arrays.
From an economic standpoint, their higher upfront bifacial gain translates to faster payback periods, especially in incentive-driven markets. Rigorous testing for salt mist corrosion and fire ratings (Class C) ensures compliance with global standards, reducing project risks for international buyers.
As a leading manufacturer in the solar industry, we specialize in ET bifacial solar panels with state-of-the-art production lines featuring automated TOPCon cell processing and electroluminescence testing. Our ISO 9001, ISO 14001, and ISO 45001 certifications underscore our commitment to quality and sustainability. We supply over 5GW annually to partners in 80+ countries, backed by Tier 1 bankability.
Our R&D team continuously innovates, incorporating feedback from global installations to refine ET bifacial solar panels for real-world performance. We offer flexible OEM/ODM services, customized power ratings, and comprehensive logistics for seamless international trade. With stringent quality control—including 100% flash testing and appearance inspection—our panels deliver proven reliability, as evidenced by third-party validations from TÜV and PVEL.
Partner with us for competitive pricing, rapid lead times (4-6 weeks), and dedicated technical support, ensuring your projects succeed with ET bifacial solar panels that set the industry benchmark.
What is the bifaciality factor of ET bifacial solar panels?
Our panels achieve a bifaciality factor of 70-80%, meaning the rear side generates 70-80% of the front side's power under identical irradiance.
How much additional energy can ET bifacial solar panels produce?
Gains typically range from 10-30%, influenced by installation height (optimal 0.5-1m above ground), surface albedo (e.g., 20% for grass, 80% for snow), and tilt angle.
Are ET bifacial solar panels suitable for all mounting systems?
Yes, they are compatible with fixed-tilt, single-axis trackers, and dual-axis systems. Rear-side ventilation is recommended for maximum gain.
What warranties are provided?
12 years on product workmanship and 30 years on linear power output, guaranteeing at least 84.8% performance at year 30.
Do ET bifacial solar panels require special inverters?
No, they integrate with standard string inverters. Bifacial gain is automatically captured without configuration changes.
How do they perform in low-irradiance conditions?
Excellent, thanks to N-type cells with superior quantum efficiency, outperforming P-type modules by 5-10% in dawn/dusk or cloudy weather.
Are customization options available?
Yes, including cable length, connector types, and power binning for specific project needs in international trade.