There is a huge opportunity for residents in India to generate their own power and save money.
For this idea, you would buy and set up solar equipment for people to install on their roofs or balconies since apartment living is popular.
The solar could feed into the main battery for the individual or building to provide additional power. To execute, you could start by finding 10 people interested in this service that will pay you before the work is done, and then you have the money to buy solar panels, creating a low initial investment for this business idea.