System Size Units:
If your system size is calculated by summing the total power output of all the PV modules, then select “WpDC – Array Size”. If your system size is calculated by summing the total power output of all the inverters, then select “WpAC – Inverter Size”.
This input refers to the maximum allowable size of the system that you wish to calculate the bill of materials for, please ensure you select the appropriate units for this system size. The calculator will design a system to be as close to this maximum size as possible as it depends on the type of PV modules and/or microinverter chosen.