Marine vessels feature a design service life of 20~30 years, far longer than automobiles. Operating in continuously high-humidity, heavy salt-fog environments within enclosed cabins, minor oversights in thermal management may lead to catastrophic thermal runaway. Products must also pass stringent certifications issued by various national classification societies, with vessel by vessel audits and lifelong liability requirements. Sunwoda states bluntly: “Battery requirements and regulatory frameworks for marine and automotive applications are nearly two entirely separate systems.” Leading enterprises compete through differentiated offerings in custom built BMS, liquid cooled thermal management and multi‑scenario adaptability.