Taiwanese battery developer Xing Mobility has presented its Immersio CTP lithium-ion marine battery system at the SMM maritime exhibition in Hamburg, Germany.
The cell-to-pack system is designed to provide continuous discharge at up to 3C for fast-transit vessels and other marine applications with sustained high-power demands.
Each cell is submerged in an electrically non-conductive dielectric coolant. Xing Mobility said removing heat directly at cell level enables the battery to maintain high power for extended periods while helping to suppress thermal runaway and prevent propagation between cells.
The company claims its cell-to-pack architecture can provide twice the energy density of conventional marine batteries, potentially halving the space occupied by the battery system. It has not disclosed the energy-density figure or the products used for comparison.
The battery is available in scalable configurations from 60–400 kWh, allowing capacity to be adjusted for different hull sizes and vessel types. Its DNV certification process is under way.
Xing Mobility has previously deployed its immersion-cooled technology aboard the Porrima P111, a zero-emission vessel launched in Taiwan and tested in open-ocean conditions.
A system has also been installed in an electric boat produced by Austrian manufacturer Smart IQ. Commissioning and system-integration testing were completed in April 2026.
The Immersio CTP made its European exhibition debut at the Electric & Hybrid Marine Expo in Amsterdam in June before its appearance at SMM Hamburg.
Xing Mobility said the marine system was derived from the immersion-cooled battery architecture it has developed for road vehicles, industrial machinery and stationary energy storage. The company opened a mass-production facility for immersion-cooled battery systems in Taiwan in 2024.
The manufacturer has not disclosed the cell supplier or chemistry beyond lithium-ion, nor has it announced production capacity or customer order volumes for the marine product.
