Voltage spikes / Low values

Dips / Droops like that can’t be good, but only 4 in a month (really only two events), not so worrisome in my mind, since the instantaneous measurement is only for a second.

And then there is also this caveat at the bottom of the Power Quality chart.

*Note: Sense may incorrectly classify other issues as a voltage dip or spike, such as a network connectivity issue or loose CT connection.