This paper studies an optimal design of grid topology and integrated photovoltaic (PV) and centralized battery energy storage considering techno-economic aspect in low voltage distribution systems for urban area in Cambodia. . Huawei Digital Power has successfully commissioned what it claims is Cambodia's first grid-forming battery energy storage system (BESS) certified by TÜV SÜD. Cambodia's. . As Southeast Asia's fastest-growing economy (6. Traditional grid infrastructure struggles to handle: "Battery swap stations cut EV charging time from hours to 3 minutes – a game-changer for logistics and public transport," says a Phnom. . The Outdoor Photovoltaic Energy Cabinet is an all-in-one energy storage system with high strength, which can work under harsh environmental conditions to supply high-performance energy backup and regulation. It is built specifically for outdoor installation and integrates advanced LiFePO₄ battery. .