As a consumer we pay twice for electricity  once at the time of  purchasing a equipment and for a second time when we use it. User must buy those products that have a power saving rating . In this way, you know ,you can save a lot of money on YOY basis.

How to calculate power consumption of home devices.
What are the annual operating costs for each product .Calculate then the power consumption for your home electronics using our practical energy calculator . Take first a look at your electricity bill , and enter the average cost for a consumption now check out the details of  your electronic devices,lamps etc. You can find how much these devices consumes power , you can even find some details via online check. You have to consider other costs and other fees as basic costs while calculating.

Power consumption excel