Select the panel you want to replace
Voc
56.18 V
Vmpp
46.16 V
Isc
14.54 A
Impp
13.86 A
TcVoc
-0.25 %/°C
TcPmax
-0.29 %/°C
Pmax
640 W
Cells
156
Bifaciality
80%
The Suntech STP640S-C78/Nsh+ 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.