Product Description

Trina Solar Vertex TSM-DEG21C.20 is a high-power bifacial dual glass monocrystalline solar module designed for utility-scale solar projects, commercial photovoltaic systems, and large-scale renewable energy installations. Featuring advanced P-type PERC cell technology, high-density interconnect technology, and multi-busbar design, this module delivers a maximum power output of up to 665W with module efficiency reaching 21.4%.

The Vertex DEG21C.20 series adopts a bifacial dual glass structure, allowing the module to capture sunlight from both the front and rear sides, increasing overall energy yield. Depending on installation conditions and ground reflectivity (albedo), the rear-side power generation can provide up to 25% additional energy gain.

With excellent reliability in harsh environments, including high temperature, humidity, salt mist, ammonia, and sandy conditions, the Trina Solar Vertex 645W-665W solar panel is engineered for long-term outdoor operation. It supports a 30-year power warranty with optimized degradation performance, making it an ideal solution for reducing LCOE (Levelized Cost of Energy) and improving project investment returns.

Product Features

1. High Power Output up to 665W

The Trina Solar Vertex TSM-DEG21C.20 series delivers outstanding power performance from 645W to 665W, providing higher energy generation per module and reducing the number of panels required for large photovoltaic installations.

Key advantages:

• Maximum power output: 665W
• Maximum module efficiency: 21.4%
• High-density interconnect technology improves cell utilization
• Multi-busbar (MBB) technology enhances current collection efficiency
• Lower internal resistance improves module performance

Higher module power helps reduce:

• Balance of System (BOS) costs
• Installation labor costs
• Land usage requirements
• Overall photovoltaic system investment costs

2. Advanced Bifacial Dual Glass Technology

The Vertex DEG21C.20 features a durable dual glass solar module structure, replacing the traditional backsheet design with heat-strengthened glass.

Benefits include:

• Improved mechanical durability
• Better resistance against moisture penetration
• Enhanced PID resistance
• Longer service life in outdoor environments
• Increased energy generation through rear-side irradiation

The bifacial design enables additional electricity production from reflected sunlight, making it suitable for:

• Ground-mounted solar farms
• Agricultural photovoltaic systems
• High-reflectivity environments
• Commercial solar installations

3. High Energy Yield Performance

The module is optimized for higher energy production under different environmental conditions.

Performance advantages:

• Excellent low-light performance
• Optimized Incident Angle Modifier (IAM)
• Improved energy output under inter-row shading conditions
• Lower operating temperature
• Temperature coefficient of power: -0.34%/°C

Compared with conventional solar modules, the Vertex series maintains better power output during high-temperature operation.

4. Superior Reliability and Durability

Built for demanding outdoor applications, the Trina Solar Vertex DEG21C.20 provides strong mechanical and environmental resistance.

Certified resistance against:

• Salt mist environments
• Ammonia corrosion
• Sand and dust exposure
• High temperature and high humidity conditions

Mechanical load capability:

• Positive load: 5400 Pa
• Negative load: 2400 Pa

This makes the module suitable for coastal areas, desert regions, and large-scale solar power plants.

5. Long-Term Performance Warranty

Trina Solar provides long-term reliability assurance:

• 12-year product warranty
• 30-year linear power warranty
• First-year degradation: 2%
• Annual degradation: 0.45%
• Guaranteed power output after 30 years: 84.95%

This ensures stable energy production throughout the system lifecycle.

Technical Specifications

Electrical Characteristics (STC)

Mechanical Specifications

Operating Conditions