ESB HDF data not matching data captured from Shelly energy meter

viperlogic

I have a Shelly EM with a CT clamp around the live tail in the CU. In comparing the HDF file downloaded from esbnetworks.ie and the data from the Shelly energy meter, I notice the Shelly is under-reporting by approx 0.8 KWh daily (house consumes approx 14 kWh daily).

Anyone notice similar in comparing their HDF data with their energy meter (if have added one)? Or anyone know of possible causes (other that possible poor tolerances or energy meter out of calibration)?

Thx

ECO_Mental

https://www.boards.ie/discussion/2058335400/esb-hdf-data-not-matching-data-captured-from-shelly-energy-meter

I have a shelly EM and I havent checked in a while but I found it to be with 1% (from what I remember) of the ESB meter. One days data is not enough to be comparing with I would say and just 14kWh. Do you know to the exact minute when the ESB meter started it might be out of sync a bit. Log data for the week or even the month first before jumping to any conclusions.