I can see daily cost, this is screenshot from my phone app

Ok, maybe I slowpork just realized myTNB portal has this very nice dashboard for energy use.

1hp Daikin (York) inverter a/c set at 22c initially runs at RM0.100/hour to cool down the room, taper off to RM0.068/hour as night goes by.

The chart goes by 30 mins block.
They even provide an estimated bill for the month. Nice!

My fridge runs at RM0.025/hour.. hmm.. need to set the temperature control of the fridge to increase temperature..
Other usage like water pump, fans, lighting, boiling water etc is assumed negligible at this point, as it's difficult to isolate and itemize usage of those items.

3hp Panasonic inverter a/c set at 26c initially run at RM0.30/hour to cool down the entire apartment. Taper off to RM0.20/hour as it goes on. I turned it off after 2 hours of use.

Front load 12kg washing machine run for 20 mins uses RM0.02.