Solar photovoltaic (PV) technology has been touted to be the major renewable energy source in several regions, especially in Singapore. It has slowly become one of the major renewable energy sources globally. Simultaneously, electric vehicles (EVs) are rapidly replacing fossil-fuel-powered vehicles as part of global efforts to reduce carbon emissions. Although each of these technologies independently represents significant progress toward carbon neutrality, their combined implementation offers even greater potential for sustainable energy systems. However, large-scale PV deployment and EV adoption pose challenges to our power grids. One of the issues is the wide variation in power supply and demand over a day, also known as the duck curve effect. In this chapter, we propose to mitigate this problem through controlled EV charging, in particular, bidirectionally to include vehicle-to-grid (V2G) charging. This chapter deals with the reduction of load profile fluctuations in the electricity grid. We use Singapore as a case study to illustrate the impact of the proposed optimization of V2G, taking into account detailed mobility patterns. We apply a controlled charging strategy to both unidirectional and bidirectional EV charging scenarios. Our results demonstrate that this approach flattens the daily load curve effectively in both cases, with bidirectional charging achieving a greater reduction in load fluctuation than unidirectional charging. This demonstrates the advantages of grid stabilization through EVs and offers a strategic pathway for maximizing PV utilization and supporting the transition to sustainable energy.