Fronius API Question | Symo

Hi,

I am attempting to assist another PVO Forum member in extracting and logging A.C. Voltage data from his Fronius [ Symo ] inverter. He does NOT have a Fronius Smart Meter.

The common Fronius API call http://fronius/solar_api/v1/GetInverterRealtimeData.cgi?Scope=Device&DeviceId=1&DataCollection=CommonInverterData does return a value for UAC ( Voltage ) but only while the inverter is actually inverting and not once it goes to sleep. He however requires 24 hour voltage monitoring and logging.

Does anyone have experience in extracting A.C. Voltage from a Fronius inverter WITHOUT an attached Smart Meter?

The reason for logging the data is to capture the rather larger swings in grid voltage at his premises.

TIA