It sends updates every second.
Power is a very fluctuating value, it probably triggers the flow every second as well.
To @Anthony_Verhaeghe :
It’s a mechanism to prevent Homey from running out of memory.
It’s a pity Athom didn’t bother to send a decent and clear description to the timeline, of why exactly a flow was disabled by Homey.
So, when you only want to control things when power gets above or below zero, you’d use the “When power became greater than” / “When power became less than” trigger.
Another method is used by this neat and highly adjustable Device Capabilities app trigger card:
