@anTastico The power consumption spike problem here seems to be resolved for me as I have been testing with a beta firmware over the past 3 weeks. You may wish to contact Wayne-TP here and see if you...

Hi TP-Link Support, I'm using a P304M to monitor the power of a few desktop PCs. Most of the time the data looks reasonably correct, but every week or so I get a massive spike of energy consumption...