Hi, Sorry to necro such an old thread, but its related anyway.
I have a house, which is always "vacant" . But when I check the TNB app, daily its consuming , I kid you not , 4-5KWH per day consistently
The meter is already converted to Smart Meter and its wiring is already came with 3 phase wiring.
What I did was :
i) I have a Kilowatt measurement meter, which plugs in any electrical device to measure.
So I measured my Samsung inverter fridge as the first culprit. (and also the fridge does not have any 5 star TNB energy rating sticker)
As I measured after slightly more than 24 hours, it consumes around 1.1Kwh and its time electrical usage recorded is around 17 hours 45 mins (meaning the remaining 6 hours 15 mins it is recorded sleeping at 0 watts)
2) Yes I have few lights turned on, but they are either LED or energy saving bulbs. They couldn't had consumed so much.
3) I have tried turning off the ELCB and Mains , checked the smart meter and confirmed it measures zero Amps in each phase.
4) When I checked the Smart Meter ,amps per phase, it shows around <0.1 Amps per phase. With exception at one point of time, it was showing 0.7Amps on Phase 1 due to fridge compressor running.
5 kwh is around 20.83 Amp hours. That translate to 0.87 Amps hour
I cannot brain, where has the remaining 3-4Kwh gone?

Not even an aircond is turned on.
Anything related to heat has higher power consumption. Anything related to cooking, boiling, air fryer, or even water heater for bath. Do you use induction stove?
PC is also a huge power draw depending on the make. Imagine if you have 12th or 13th gen Intel and RTX GPU. I kid you not when you game for few hours a day.
Front load washing machine also sucks a lot more power than top load since it would have heater function.