Trina Solar TSM-660DEG21C.20 Solar Module 660 Watt Silver/white Bifacial Glass-Glass 12 Years Product Warranty

The Trina Solar TSM-DEG21C.20-660 is a high-power bifacial dual-glass module delivering 660 Wp using monocrystalline high-density-interconnect cells (132 cells). It offers up to ≈21.2% module efficiency for the 660 W bin, measures 2384 × 1303 × 33 mm, weighs ≈38.3 kg, supports 1500 V DC system voltage and is rated for 5400 Pa positive / 2400 Pa negative mechanical loads; warranty terms include 12 years product workmanship and a 30-year power warranty with 2% first-year degradation and ~0.45% p.a. thereafter.

 • Very high power output — 660 Wp: maximizes energy yield per module and reduces BOS and installation cost per kWp.
• Bifacial dual-glass design: rear-side generation increases total energy yield (bifaciality ~70% ±5%, site dependent).
• Excellent real-world performance: high-density interconnect cell layout and multi-busbar technology improve low-irradiance and shading response.
• Rugged mechanics: certified for 5400 Pa snow and 2400 Pa wind loads for reliable performance in harsh climates.
• System savings: 1500 V compatibility enables longer strings and reduced inverter/BOS costs.
• Installer-friendly: IP68 junction box, MC4 EVO2 / TS4 compatible connectors and 4.0 mm² pre-wired cable for fast, reliable connections.
• Long warranty & low degradation: 12-year product workmanship plus 30-year performance coverage with conservative degradation assumptions.

 • Nominal power (Pmax): 660 Wp
• Cell type / count: Monocrystalline, high-density interconnect — 132 cells
• Module design: Bifacial Dual-Glass (glass-glass)
• Module efficiency: ≈21.2% (660 W bin)
• Dimensions: 2384 × 1303 × 33 mm
• Weight: ≈38.3 kg
• Electrical (STC): Vmp 38.1 V | Imp 17.35 A | Voc 45.9 V | Isc 21.2 A | Power tolerance 0 ~ +5 W
• NOCT (representative): Pmax ~499 W | Vmp 35.4 V | Imp 14.10 A | Voc 43.2 V | Isc 14.87 A | NOCT 43°C
• Temperature coefficients: Pmax −0.34%/°C | Voc −0.25%/°C | Isc +0.04%/°C
• Mechanical & electrical: Snow 5400 Pa / Wind 2400 Pa | Max system voltage 1500 V DC | Max series fuse 35 A
• Construction & connectors: 2.0 mm AR coated heat-strengthened front/back glass, frame 33 mm anodized aluminium, J-Box IP68, cable 4.0 mm², MC4 EVO2 / TS4 compatible
• Warranty & degradation: 12 years product workmanship | 30 years power warranty; 2% first-year loss, ~0.45% annual attenuation

The TSM-DEG21C.20-660 combines very high per-module power (660 Wp), bifacial dual-glass durability and strong real-world performance — an excellent choice for utility and large commercial projects seeking low LCOE and long operational life. Buy securely via certified distributors on SolarTraders and register now to request a customized project quote.

DEG21C.20 BIFACIAL DUAL GLASS MONOCRYSTALLINE MODULE series features High customer value, High power up to 665W, High reliability and High energy yield.

Trina Solar is one of the world’s leading manufacturers of photovoltaic modules. With advanced cell technology, their modules deliver maximum efficiency, reliable performance, and long lifespan – suitable for residential rooftops and utility-scale projects. With best price guarantee, fast delivery, and attractive B2B conditions, Trina Solar is the strong choice for professional solar installers.