New Delhi, Oct. 21 -- Every summer, the blazing heat makes air-conditioners an indispensable part of our daily lives. What follows next are hefty electricity bills.

You can install a rooftop solar (RTS) system at your home for some relief. The central government provides a subsidy on the installation cost of grid-connected systems under its PM Surya Ghar Muft Bijli Yojana (PM Surya Ghar Yojana). Those with high power consumption can recover the installation cost within a few years' time. That apart, it can give you the satisfaction of contributing to a cleaner environment.

What you essentially need is adequate roof space (a 1 kWp system requires 10 square metres) and the ability and willingness to bear the upfront installation cost. If ...