While reading news online, came across this brilliant tool called Google PowerMeter. Have not used it yet but as mentioned on Google’s Blog, it is also supported in India by Reliance Energy which feels good.
If this works properly, we specially in Mumbai where Reliance Energy is the power supplier, people like us can track our power consumption and test different things to reduce it.
How it Works: http://www.google.org/powermeter/howitworks.html
For more on PowerMeter, check out the YouTube video.
You Tube Video