587 Voltage dips! What is going on?

Could be lots of other causes.

  1. A 240V power hog turning on and off at your house or at a neighbors that is on the same distribution transformer. I say 240V because issue appears to be happening on both legs.
  2. Your utility having difficulties. Which utility provides your electricity.

If you PM the CSV of your Power Quality alerts, I can post a graph like this:

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