Works in tandem with COM Cards within DatCom System to provide real-time and archived data and enable use of PC based monitoring and free web-hosted data access. Supports 1 Fronius IG Solar Inverter. The Datalogger easy was created for small systems with only one Fronius IG. It has the same functions as its big brother – Datalogger pro – but is restricted to one inverter. Low-cost and high-power. External device for collecting and archiving data.