Hi,
I have a EM that open/close as well as measuring the power of the solar water heater those days that there is no sun.
The power measured is for example 3700watts, however the power factor is -1 as well as the VAR is negative.
Obviously the EM switch and the solar water heater are on the same phase.
When checking the 3EM, the phase C where the solar water heater belongs, is showing correctly power factor 1.
In the system there are no solar panels or anything that producing energy.
Attached the 2 screenshots of EM and 3EM when solar water heater is on.
Any idea why this is happening?