Hi Ellen, Thank you for your kind reply. For my case, I have reviewed the graph of daily usage in Jan. My daily rate is ~15 kWh/day, compare to Feb daily rate is ~4 kWh/day. That was an enormous change and what I suspect is the smart meter fault. It cannot be a power surge on a particular day but a meter fault. I was called by AGL in week 7 Feb to replace the smart meter, so I assume everything is fixed. Actually, the technician came on that day only replaced the meter, but he did nothing to rec ...