I've been noticing something weird lately... I'm keeping an eye on my IT-related power usage (read: put a clamp on its circuit), and I notice that my base load (night) graph sometimes gets it wrong.
Last night between midnight and 7 in the morning, my hourly readings ripple between 98 and 100 watts, yet my night reading for that circuit says 116 watts.
Surely that reading should never be above 100 watts? Calculation issue or some other hidden cause?