On non-Inverter ACs, I only need to use the power input (e.g. 800W) to calculate my energy cost for a 12-hour usage. (800*12/1000 = 9.6kW-hr)
On Inverter ACs though, I know they don’t operate at 100% all the time, and most of the time the only information I get is their cooling capacity (e.g. 1hp ≈ 746W) and their EER (e.g. 12.2 kJ/hW).
How do I use these to get a rough estimate of the energy cost?
Conventional ACs don’t “operate at 100% all the time” either. The compressor is cycled by the thermostat. You cannot calculate consumption of either without knowing the temperature gradient between the conditioned and outside space.
Depends on your cooling requirements? Full blast it is the same as before. Anything less proportionally less.
A power meter is like 10 bucks. If you really want to know, that’s probably the easiest way.
