Does anyone know if there exists an AC power meter (like the Kill-A-Watt) with some kind of interface that can be read with a computer (e.g. serial port, usb)?
I've noticed that the readings on my Kill-A-Watt fluctuate. Obviously, adding various kinds of load will cause a fluctuation, but I've noticed this when there aren't any readily explainable causes.
I think it would be cool to be able to read and log power usage; the logs could then be compared to the system logs to hopefully track down power-hungry processes.
Also, for Linux users, there's an actual program, PowerTop
, that can be used for the same end (reducing overall system power consumption). The means is different---it monitors CPU wakeups---but is still a useful tool (especially for preserving battery life on laptops).