
Battery Controls
Battery Disconnect Unit/String Control Unit (BDU/SCU)
The BDU manages individual strings of series-connected XMP subpacks through its on-board String Controller Unit (SCU), pre-charge circuit, current sensor, and contactors. For large XPAND systems of multiple parallel-connected strings, BDUs are connected in parallel.
- Compatible with 12V or 24V systems
- Isolated high voltage measurements up to 1250 VDC
- Current sensing capability -500A to +500A standard; up to ± 1200A optional
- Redundant dual contactor controls ensure safe operation
- Self-addressing provides simple installation and service
- IP69 compliant (with connectors mated)
Master Control Unit (MCU)
The MCU manages multiple parallel strings (up to 24) while providing a single and simple interface to the application controller.
Features
- Compatible with 12V or 24V systems
- Autonomously controls balancing of battery strings
- Provides autonomous addressing to individual battery strings, supporting a true modular architecture
- HV Interlock Loop (HVIL) monitoring of each battery string
- Provides collective system and diagnostic information to the application
- IP69 compliant (with connectors mated)