Want to go green with solar? Here’s everything you need to know SECTIONS Share Synopsis Should you go solar? How much would you have to invest, and how long will it take to recover the investment? What type of solar panel is best for you? Read on to find out the answers to all your queries on rooftop solar energy system. Agencies In general, customers tend to recover the initial investment on installing solar energy systems in about 4-5 years. Who should go for it? According to Abhishek Mane, the founder of solar startup Deeva Solar, if your monthly electricity bill is about Rs 3,000, then you should opt for rooftop solar. For that, you'll of course need to have enough sun-lit space for the solar panels to be installed.