Is solar energy the solution for India energy problems?

From The Economist: 

ON A salt plain near the border with Pakistan lies half a billion dollars’ worth of solar-energy kit paid for by firms from all over the world. A million panels stretch as far as the eye can see. Past a dishevelled brass band is a tent crammed with 5,000 people who cheer when Narendra Modi, the chief minister of Gujarat, declares the solar park open: “I pray, sun god, that today Gujarat will show the way to the rest of the world for solar energy.”

. . . however, the the message of the article is not optimistic. The main problems: high prices, and weak infrastructure.