For a very long time I’ve wanted to know how much is the charges if I use an electrical appliances such as my computer, air-conditioner, water heater and etc…
When I was very young, my mother used to tell me that air conditioner, water heater and iron consume a lot of electricity, and therefore, it’s expensive to use them. Even worst if you’ve forgotten to turn them off!
Every electrical appliance should have Watt (W).
This is the info that you need to calculate the usage of the electrical appliances that you use in hours.
Some doesn’t display Watt, but only Volt (V) and Ampere (A).
To get Watt, just multiple volt and ampere. Meaning, V x A = W or A x V = W. It’s the same.
In Malaysia, Tenaga Nasional Berhad(TNB) charges for home usage electricity is:
For the first 200 units per month: 0.218 cents
For the next 800 units per month: 0.258 cents
For each additional units per month: 0.278 cents
Formula to calculate electricity usage.