The Interface Card enables a user to output data into an open protocol for a system of anywhere between one and 100 Fronius IG Inverters. This data could then be used by third-party sources for different monitoring options (e.g. Fat Spaniel). This card does not replace the need for a Datalogger Box or Card. This interface offers real time open protocol data without data storage for up to 100 inverters and 10 sensor boxes.