Soo.... The article suggests that there are roughly 4x40 million = 160 million households in the country, and 1.3 billion people. Divide the one by the other and you get an estimate for the household size of roughly 10 people. That seems rather larger to me, also given the fact that large IT cities like Bangalore are growing like crazy - all with one or two people in an appartment, not 10.
Next, getting 40 million households hooked up to the electricity network for 2.5 billion dollar. Dividing again gives 2500 dollar per 40 households or 60 dollar per house. While labor is cheap in India - this is not going to work.
And indeed: 40 million more housholds (or 300 million more Indians with access to electricity) is not going to do the networks much good...