EM - CALIBRATION OF MEASUREMENTS

Interested in it too.

I'm interested also.... I've just enter here to write a new post about calibration since I've noticed a mismatch between Shelly EM and the fuse box...

Same here my Shelly EM is always around 10% out everyday on consumption it’s driving me crazy. Checked the clamps, separated as best I could to stop cross induction. Still not right. I bought into Shelly as I heard so much good stuff kind of regretting it now 😞

I see this thread is marked as "resolved" but there is no concluded response.

Is there any possibility to calibrate shellyEM from the software interface? It would not be too difficult to add something like that in the firmware.

(like a correction factor percent in format +/- 0.0% for each input voltage, current1 and current2)

For example i get different readings for the current when switch the transformer current.

This error multiplied with the voltage reading error, adds a lot of error to power/energy log.

I have a PZEM004T and this has a very good precision measured with calibrated DM.