The majority of people on the planet today reside in cities. Significant rural-to-urban migration is occurring, and it is anticipated that this trend will continue for the ensuing few decades (the World Migration Report 2015 estimates that 814 million people will live in urban India by 2050). Cities now face several difficulties as a result of the transition toward urbanization, including issues with waste management, few resources, air pollution, health risks, traffic congestion, and inadequate infrastructure. Cities all across the world are looking for creative ways to address these issues, which has given rise to the idea of “smart cities.” A smart city is an efficient, sustainable metropolitan area that strives to give its residents a more affordable, liveable, environmentally friendly, and stimulating environment. Utilizing renewable energy sources and optimizing urban energy use are essential for raising the standard of living for residents. The chapter delves deeply into the fascinating partnership between advances in smart city technology and solar electricity. It looks at how they may work together to create cities that are more hygienic, productive, and capable of overcoming obstacles. Reducing carbon emissions and building more resilient urban ecosystems are the main goals. You will gain knowledge about a variety of solar technologies, including photovoltaics (PV), which turn light directly into electricity; concentrating solar power (CSP), which powers utility-scale electric turbines with solar heat (thermal energy); and solar heating and cooling (SHC) systems, which use thermal energy collected from the sun to heat water and air conditioning. Numerous facets of city life, including as infrastructure, services, buildings, and transportation, are powered by these technologies. This chapter sheds light on the obstacles that stand in the way of solar energy’s potential to power sustainable, smart cities of the future. This chapter examines policy barriers, budgetary constraints, and technological limits. To overcome these obstacles, the chapter suggests a course of action centred on creative policy (for instance, as of June 30, 2023, data from the Ministry of New and Renewable Energy indicates that the installed capacity for solar power under the Jawaharlal Nehru Solar Mission has reached roughly 70.10 GW), collaborations between public and private entities, and community involvement. We can develop dynamic urban environments and realize the full potential of solar energy by overcoming these obstacles. The chapter essentially emphasizes that solar energy is essential to creating the intelligent and sustainable cities of the future.