Solar Inverter Sizing Calculator

Calculate inverter size, DC/AC ratio, string configuration, and MPPT voltage window for PV systems.

Sum of all solar panel ratings.
kWp
Voltage at max power per panel.
V
Open circuit voltage per panel.
V
Short circuit current per panel.
A
Number of panels in series per string.
Number of parallel strings.

Results

String Vmp-V
String Voc (max)-V
Array Current-A
Min Inverter AC Rating-kW
DC/AC Ratio-
References: NEC 690; IEC 62109; UL 1741