Hi Lester Thanks for the reply. The load spikes are from a kettle and a microwave because we breed exotic parrots, which heat water for their formula, etc. On the graph for the 13th, there are only two small bumps in grid usage throughout the whole 24-hour period one at 8.35 am and the other at 9.35 am, no more than 0.12 kWh for a very short space of time, which may equate to the 0.67kWh recoded for the day, that's fair enough, but not the continuous drain from the grid that doesn't show that if ...