Select the panel you want to replace
Voc
49.75 V
Vmpp
41.38 V
Isc
16.33 A
Impp
15.47 A
TcVoc
-0.24 %/°C
TcPmax
-0.28 %/°C
Pmax
640 W
Cells
132
Bifaciality
80%
The Tongwei TWMNH-66HD640 is a 640 W solar panel. Finding a compatible replacement requires matching the original electrical characteristics — particularly Voc, Vmpp, Isc, and temperature coefficients — to ensure safe operation within the same string.
Use the form above to find panels that match these specifications. Then verify the replacement in the String Compatibility Calculator with your inverter.