TOPKING NES144-7-550MDG Solar Panel 550W TOPCon N-Type Bifacial – Premium 21.23% Efficiency with 30-Year Warranty

Next-Generation Bifacial Technology for Superior Energy Production

The TOPKING NES144-7-550MDG represents the forefront of solar panel innovation, combining cutting-edge TOPCon N-Type cell technology with advanced bifacial design to deliver exceptional energy harvest capabilities in all installation environments. This premium 550W module harnesses sunlight from both front and rear surfaces, significantly increasing energy yield compared to traditional mono-facial panels.

Key Features and Benefits

Advanced TOPCon N-Type Cell Technology

• Superior N-Type silicon delivers higher efficiency and better performance
• TOPCon (Tunnel Oxide Passivated Contact) technology reduces electron recombination
• Lower temperature coefficient improves performance in hot climates
• Exceptional resistance to light-induced degradation (LID) and potential-induced degradation (PID)
• Enhanced low-light performance extends daily production hours
• Industry-leading 21.23% front-side conversion efficiency

Revolutionary Bifacial Design

• Captures reflected light from the rear side for additional energy generation
• 5-30% energy boost depending on installation surface reflectivity (albedo)
• Dual-glass construction eliminates backsheet limitations and enhances durability
• Superior performance in snow conditions through ground reflection
• Ideal for elevated installations, ground mounts, and tracking systems
• Bifacial gain optimized through specialized cell and busbar design

Innovative Half-Cell Configuration

• 144 half-cut TOPCon N-Type cells reduce resistive losses and hot spots
• Split junction box design creates two parallel circuits for improved shade tolerance
• Lower operating temperature improves overall efficiency and longevity
• Reduced cell size minimizes micro-crack risk and enhances durability
• Optimized internal circuitry reduces mismatch losses

Exceptional Durability and Reliability

• Double-glass construction provides superior mechanical strength
• Enhanced resistance to environmental factors including humidity, salt spray, and ammonia
• Frameless or framed options available for flexible installation requirements
• Excellent wind load (2400 Pa) and snow load (5400 Pa) ratings
• Highly resistant to potential-induced degradation (PID)
• Minimal annual degradation rate of only 0.4% after first year

Industry-Leading Warranty Protection

• Extended 30-year linear power output warranty
• First-year maximum degradation of only 1%
• Subsequent annual degradation of just 0.4%
• Minimum 87.4% power output guaranteed at year 30
• 12-year product materials and workmanship warranty
• Certifications: IEC, UL, MCS, CEC (confirm specific certifications)

Technical Specifications

Electrical Parameters (STC):

• Maximum Power (Pmax): 550W (front side)
• Bifacial Factor: 70-80% (additional power from rear side)
• Module Efficiency: 21.23%
• Open Circuit Voltage (Voc): 49.8V (estimated)
• Short Circuit Current (Isc): 14.0A (estimated)
• Maximum Power Voltage (Vmp): 41.6V (estimated)
• Maximum Power Current (Imp): 13.2A (estimated)
• Power Tolerance: 0~+5W

Mechanical Characteristics:

• Cell Type: TOPCon N-Type Bifacial
• Cell Configuration: 144 half-cells (6 × 24)
• Module Dimensions: Approximately 2278 × 1134 × 35 mm
• Weight: Approximately 32 kg
• Front/Back Glass: 2.0mm tempered glass (both sides)
• Junction Box: IP68 rated, split design with bypass diodes
• Cables: 4mm² photovoltaic cable, length 1200mm
• Connectors: MC4 compatible

Temperature Characteristics:

• Operating Temperature Range: -40°C to +85°C
• Temperature Coefficient of Pmax: -0.30%/°C (improved vs. P-type)
• Temperature Coefficient of Voc: -0.24%/°C
• Temperature Coefficient of Isc: +0.044%/°C
• NOCT (Nominal Operating Cell Temperature): 43±2°C

Maximum Ratings:

• Maximum System Voltage: 1500V DC
• Wind Load: 2400 Pa
• Snow Load: 5400 Pa
• Maximum Series Fuse Rating: 25A

Ideal Applications

• Ground-mounted solar farms with high albedo surfaces
• Solar tracking systems maximizing bifacial advantage
• Elevated rooftop installations with reflective surfaces
• Carport and canopy solar structures
• Floating solar installations (waterproof design)
• Commercial and industrial flat roof systems
• Agricultural solar applications (agrivoltaics)
• Snow-prone locations leveraging reflection
• Utility-scale projects requiring maximum long-term yield
• Premium residential installations seeking maximum ROI

Installation and Performance Benefits

Enhanced Energy Yield The bifacial design of the TOPKING NES144-7-550MDG captures reflected light from surfaces below and behind the panel, generating up to 30% additional energy compared to traditional mono-facial modules of the same rated capacity. This bifacial gain is particularly significant in installations with highly reflective surfaces such as white roofs, light-colored ground cover, snow, water, or concrete.

Superior Performance in Diverse Conditions The advanced N-Type TOPCon cell technology delivers exceptional performance across varying environmental conditions. The lower temperature coefficient ensures better performance in hot climates, while improved low-light response extends daily production hours during dawn, dusk, and cloudy conditions. The bifacial capability further enhances energy capture in diffuse light conditions.

Optimized Balance of System Costs The high power rating and bifacial gain of the NES144-7-550MDG enable system designers to install fewer modules for the same energy output, reducing balance of system costs including mounting hardware, wiring, and labor. The 1500V maximum system voltage rating allows for longer string configurations, further optimizing installation efficiency.

Excellent Degradation Resistance N-Type cells are inherently resistant to light-induced degradation (LID) and light and elevated temperature-induced degradation (LeTID), common issues with traditional P-type cells. This resistance, combined with the module’s robust dual-glass construction, ensures consistent performance and minimal power loss throughout the panel’s extended 30+ year lifespan.

Environmental Benefits The dual-glass design eliminates the need for a conventional plastic backsheet, reducing environmental impact and improving recyclability at end of life. The higher energy yield and longer lifespan also improve the overall carbon footprint and sustainability profile of the solar installation.

Why Choose TOPKING TOPCon Bifacial Solar Panels?

TOPKING has established itself as a leader in renewable energy solutions through unwavering commitment to innovation, quality, and performance. Our NES144-7-550MDG TOPCon N-Type bifacial solar panel represents the culmination of advanced photovoltaic research and development, delivering industry-leading results for demanding residential, commercial, and utility-scale applications.

With its exceptional combination of TOPCon cell efficiency, bifacial power gain, durability, and reliability, backed by an industry-leading 30-year warranty, the TOPKING NES144-7-550MDG represents the ideal choice for forward-thinking customers seeking the highest return on investment through decades of enhanced clean energy production.

Elevate your solar investment with TOPKING’s cutting-edge bifacial technology – where next-generation innovation meets uncompromising reliability for maximum sustainable power generation.