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DMEGC DM640M10T-B78HSW

DM640M10T-B78HSW

640 Wp Monocrystalline Bifacial
Datasheet
Efficiency
22.90%
Power Density
229.0 Wp/m²
Temp. Coeff. Pmax
-0.290%/°C
After 30 years
559W
  • Efficiency of 22.9% matches the TOPCon 600-650W median
  • At 228.9 W/m² power density, roof space requirements are typical for TOPCon 600-650W panels
  • Temperature coefficient of -0.29%/°C matches the TOPCon 600-650W median
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
  • Ranked #1853 out of 11891 panels for efficiency in the database
Performance Profile
Price Offers 0
Shop Country Price Price/kWp
Series DMxxxM10T-B78HSW 5 variants
Efficiency Range 22.5% - 23.3%
Avg. Efficiency 22.90%
Technology TOPCon
Dimensions 2465 × 1134 mm
Show series description

The DMEGC DMxXXM10T-B78HSW series are bifacial modules in a bi-glass configuration, designed for installations where real energy gain matters as much as catalog parameters. The application of N-type monocrystalline TOPCon technology helps maintain high performance over time and minimizes typical losses found in older designs. Thanks to the dual-glass structure, the modules are better prepared for challenging environmental conditions—from humidity and ammonia to wider temperature fluctuations, which is especially important for projects deployed for years. Another key advantage is bifaciality, which allows using reflected light from the ground, increasing energy production in PV farms, ground-mounted systems, and bright commercial rooftops. The series focuses on high mechanical durability and operational stability, translating to lower warranty claim risks and a more predictable energy cost over the entire lifecycle. This makes it an excellent choice for C&I and utility investors aiming to maximize yield on limited surfaces and enhance project profitability.

Panels from the same series differ mainly in power output while having identical dimensions. Learn why →
Electrical Parameters (STC)
Nominal Power (Pmax)640 Wp
Module Efficiency22.90%
Voltage at Max Power (Vmpp)47.86 V
Current at Max Power (Impp)13.39 A
Open Circuit Voltage (Voc)57.70 V
Short Circuit Current (Isc)14.14 A
Max System Voltage1500 V
Temperature Coefficients
Temp. Coeff. Pmax-0.290%/°C
Temp. Coeff. Voc-0.250%/°C
Temp. Coeff. Isc0.048%/°C
NOCT42°C
Cell Technology
Cell TypeMonocrystalline
Cell Count156
BifacialYes
Bifaciality Factor80%
Dimensions & Weight
Length2465 mm
Width1134 mm
Height30 mm
Weight33.5 kg
Area2.80 m²
Power Density229.0 Wp/m²
Warranty
Product Warranty15 years
Performance Warranty30 years
End-of-Warranty Output87.4%
First Year Degradation1.00%
Annual Degradation0.40%/year
Key Specifications
22.90%
Efficiency
640 Wp
Power
-0.29%/°C
Temp Coeff
30 yrs
Warranty
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