Select the panel you want to replace
Voc
42.49 V
Vmpp
35.38 V
Isc
12.59 A
Impp
11.88 A
TcVoc
-0.25 %/°C
TcPmax
-0.34 %/°C
Pmax
420 W
Cells
120
The Risen RSM40-8-420M is a 420 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.