The following calculator will help you calculate the DC current (from the controller to the battery) and the AC current (from the inveter to your house). You have to input your solar panel rated power (200w, 300w, 400w, etc.…) and the system overall loss will have a default 22% value, but you could edit it. The calculator output will be the current supplied to batteries (DC current) at any voltage you specify, and the AC current supplied to your house according to your country’s voltage rating.
For more details on using this calculator and how it works, you should read the article that explains How Many Amps Do Solar Panels Produce.
