SYMAP® BAT, Power Management for hybrid vessels
SYMAP® BAT is a protection, control and Power Management solution for hybrid systems and battery converter applications. It is used to integrate battery energy storage into the electrical system of a vessel or installation, particularly where the battery converter must be coordinated with generator groups, the busbar, the main breaker, the transformer and the supervisory system. It is built on the same hardware as SYMAP® ECG (marine LV) with alternative firmware for battery converter integration, making it suitable for marine hybrid applications: battery-hybrid ferries, electric harbour tugs, hybrid offshore support vessels, and other vessels that combine a battery bank with diesel or gas gensets to reduce emissions in line with IMO regulations.
In hybrid marine systems, SYMAP® BAT provides LV and MV protection of battery converter outputs, transformer differential protection, synchronization of the battery converter to the busbar, main breaker control, load sharing between generators and battery converters, controlled supply for battery charging, and a stand-by diesel start demand on low battery level. In hybrid DP architectures SYMAP® acts as the PMS, protection and control layer, coordinating with the DP/IAS system, generator groups, battery converters and busbar sections. Communication with the SCADA system is realized over Modbus RTU or Modbus TCP, with CANBUS communication between SYMAP® devices and discrete signals to the battery converter.
SYMAP® BAT does not replace the BMS. The BMS remains responsible for battery cells, modules, safety and internal battery logic, while SYMAP® BAT provides the protection, control, Power Management and communication layer for integration of the battery converter into the electrical system.
