Hi.
I recently got 2 Shelly 3EM device, to monitor 6 circuits (one 3 phases).
All shellys current sensors are connected to their respective phase and voltage sensor. I've checked this multiple times to make sure this was correct (the manual BTW is incorrect, "K" must be the direction of the load, not L which needs to point to grid, made me waste hours to figure it out and re-connect everything in a very tight board).
Originally, both were showing the same problems on phase B: when there was close to no load on the circuit, it would show a small negative values (between -3W and -11W) and as soon as their was a power draw then it would read correctly.
After restarting one shelly and clicking on "Restore Factory Calibration (All Phases), things got fixed, and it properly showed 0W as expected. That was weird as I never did a calibration to start.
But for one, it always shows -3W when there's nothing (power factor is showing as negative), as soon as you start something, it goes back into the positive.
I'm 100% certain that the voltage input is on the same phase as the CT sensor, this sensor is marked as "B" though I doubt this make a difference, I connected it to "phase 2" (white)
In Australia, Phase 1 is Phase B (+120 degrees shift), blue
Phase 2 is Phase C (+240 degrees shift), white
Phase 3 is Phase A. red.
Interestingly, this shelly is always reading the voltage exactly 1V under what the other shelly is ready, on all 3 phases.
Any ideas what is going on and is that fixable in software?
