Marine BMS Overview: 96 V 400 A Contactor Architecture An electric boat places demands on a battery system that a road vehicle never does: long periods at a modest cruising current, followed by short, violent demands from a bow thruster or a docking manoeuvre. The JNFN ANT 24ZMB was engineered around that duty profile, with a 96 V platform, 20 to 24 series cells, 400 A continuous and 800 A for five seconds, and a contactor-based switching stage rather than a MOSFET bank —