India's national missions to advance demand-side management and distributed energy resources (DERs) such as the enhanced energy efficiency, smart grid, wind and solar energy, electric mobility etc. provide a pathway for sustainable developments. With these national missions, India is relying on large targets of 175 GW of renewable energy generation by 2022, which comprises 100 GW solar, 60 GW wind, 10 GW biomass, and 5 GW small hydro projects and have plans for 40% of generation capacity through non-fossil sources. Integration of DERs like rooftop solar, energy storage, electric vehicles, and demand flexibility becomes important to address the challenges of supply variability and cost-effective integration. Fundamental aspects for the integration of multifarious – large-scale and disparate technologies – DER and flexible demand [e.g. demand response (DR))] applications will be examined. During peak times a distribution utility can ask customer to reduce the demand with the help of DR programme and customer can use electricity from electric vehicle using vehicle to grid technology or energy storage. The results show that for high penetration of DERs, it is important for a distribution utility to engage customers and use smart grid technologies to automate monitoring and actuation of the resources in real time.