Battery Management

SubCtech developed its own battery-management-system (BMS) to observe the Li-Ion PowerPacks™ conformable to the requirements of science or the offshore industry.

SmartBMS™ is tiny and needs very little energy, because it is developed with the newest technologies. Therefore, it is suitable for long-term usage under extreme conditions. The SmartBMS™ is available for all Li-Ion batteries and provides a data interface to monitor e.g. the state of charge (SOC), current or voltage by external devices.



    • Latest specialized Li-Ion supervisor technology
    • Ultra-low-power consumption
    • Different sizes for any type of Li-Ion batteries
    • Configurable for different battery configurations
    • Real-time data output
    • Fail-safe



    • Galvanic de-coupled interface lines
    • High-precision data acquisition 24bit
    • Data interface RS-232 or RS-485, galvanic isolated, ASCII NMEA-0183 or MODBUS RTU protocol
    • 14.4V to 50V standard BMS, up to 600V / 30kW on request


    • Data logging on industrial SD card of up to 32GB
    • Digitally controlled output
    • Remote On/Off by any logical signal

ISO 9001:2015

Manufacturing according to ISO 13628-6 & API17F

UN 38.3

Qualified systems for international Airfreight (IATA)


Military Standard – shock & vibration tested

SIL IEC 61508

Developed according to the requirements of functional safety




Standard SmartBMS™ series production

UPS controller

 UPS controller

Small subsea UPS controller (API17F)

Li-Ion PowerPack™ incl. SmartBMS™ rack

 Li-Ion PowerPack™ incl. SmartBMS™ rack

Li-Ion PowerPack™ incl. SmartBMS™ optionally controls digital outputs, with control lights in the end cap

UPS charge unit

 UPS charge unit

400V subsea UPS charge unit (API17F)

Get in touch

    Please prove you are human by selecting the truck.