Tongwei TWMND-78HD640 — 640W TOPCon Solar Panel | Solar Stack Free solar panel & inverter compatibility checker. Verify your PV string configuration is safe before installation.
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Solar Panels Tongwei TNC 2 0-M10-78 DUAL-GLASS TWMND-78HD640 Tongwei TWMND-78HD640 640 W TOPCon TNC 2.0 M10-78 Bifacial Bifacial 80% 156 cells
The Tongwei TWMND-78HD640 is a 640 W solar panel featuring TOPCon cell technology. Below are the verified electrical and thermal specifications extracted from the manufacturer datasheet.
Technical Specifications
Electrical Characteristics (STC)
Peak Power (Pmax) : 640 W
Open-Circuit Voltage (Voc) : 57.4 V
Max Power Voltage (Vmpp) : 48.22 V
Short-Circuit Current (Isc) : 13.86 A
Max Power Current (Impp) : 13.28 A
Number of Cells : 156
Temp. Coefficient Voc : -0.24 %/°C
Temp. Coefficient Isc : 0.046 %/°C
Temp. Coefficient Pmax : -0.28 %/°C
Max System Voltage : 1500 V
Nominal Cell Temperature (NOCT) : 45 °C
Cell Technology : TOPCon
Bifaciality Factor : 80%
Max Series Fuse : 30 A
Power Tolerance : +3%
Length : 2465 mm
Width : 1134 mm
Thickness : 30 mm
Weight : 33.8 kgOther Models in This Series Model Power Voc Isc
625 W 56.8 V 13.74 A
630 W 57 V 13.78 A
635 W 57.2 V
TWMND-78HD640 Current
640 W 57.4 V 13.86 A
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