Solar is not the alternative, it is the only way of getting light in our houses and water in our fields. TATA group of companies having solar system. As of i know, The solar for house is two type.
1) Total comes around Rs.50,000/ they supply two batteries with one converter and a panel.
2) If u already have UPS - the cost around Rs.30,000/- they will instal only panel and connect to your existing system.
Solar for agriculture, one of my client installed 2 HP Motor costing above 3 lacks. 12 years guarantee for the motor (imported)
I will give you some details if available in future