Solanki said, "It (hydro-electric generation) has gone down, in the northern part of the country. We lost almost 15 pc (of the total hydro-electric installed capacity) from Jun to Aug."
"But things are improving because of the rain (fall) received in the past few days," the Minister said.
According to the data available on the ministry's website, India has installed power generation capacity of over 1,51,000 MW.
State run hydel-power generator NHPC Ltd has lost 200 million units of power since Apr 2009 due to poor rainfall.
Solanki said the power sector needed massive investments to the tune of Rs 5 lakh crore.