The electrification of ships is an irreversible development trend, promoting sustainable and eco-friendly shipping industry applications. Represented by all-electric ships (AESs), the efficient integration of various clean energy systems is an increasingly popular emission-aware solution, which can be regarded as an “isolated mobile microgrid.” However, drastic load variations during navigation in multiple scenarios pose a formidable challenge to ensuring the real-time power balance and voltage stability of this special microgrid. To guarantee the “green, safe, and sustainable future” of the shipping industry, the integration of large-scale energy storage systems (ESSs) can effectively improve the operational flexibility of AESs. Nevertheless, ESSs face more potential impacts from unique marine environments, such as frequent shipboard swaying, high temperature, and humidity etc. These impacts may bring more unpredictable performance degradation of ESSs than terrestrial applications, thereby significantly affecting their power supply capability. Therefore, the safe and stable operation of ESSs cannot be ignored in harsh marine applications. In this book, the characteristics of multi-scenario shipboard loads and shipboard ESSs are detailed, and an integrated state-power control strategy is proposed to address irregular power profiles and enhance the environmental adaptability of ESSs. Finally, future research directions are further discussed concerning multiple energy management and grid-forming control schemes.