This energy monitor plug is actually really smart inside.

I was expecting this cheap energy monitor plug from eBay to be usable, but inaccurate.
It's not. There is a very fancy chip inside that rivals the accuracy of the Hopi, but with the slight annoyance of only displaying one or two variables at a time.

The chip has a manual that is over 100 pages long!
http://vangotech.com/uploadpic/151321...

Which beats the processor in the same unit.

With proper understanding of the circuitry being at mains potential, the small circuit board could be an excellent base for a customised energy monitoring system.

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