As Southeast Asia accelerates its transition to renewable energy, the role of energy storage is coming into sharper focus. With solar and wind expected to surpass fossil fuels by 2035, the challenge lies in ensuring grid reliability and cost-effective storage solutions. Large-scale storage options like pumped hydro and molten salt storage are gaining traction, while lithium-ion and flow batteries are emerging as viable alternatives for urban centers and industrial hubs. We are additionally exploring how microgrids and decentralized storage could reshape energy resilience in a region prone to climate disruptions.