FS-XT by Maxwell: Advanced Distributed BMS for High Voltage Systems
A scalable and intelligent BMS designed for commercial EVs, industrial storage, and backup battery systems.
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FS-XT
FS-XT is a distributed BMS designed for high-voltage battery systems that utilize multiple battery modules connected in series and parallel.
The system consists of a Master unit and supports up to 40 Slave units, with each Slave monitoring 6 to 18 cells in series.The Slave units communicate with the Master unit via the state-of-the-art isoSPI protocol, eliminating the need for a processor.
The Master unit runs advanced State of Charge (SOC) and State of Health (SOH) algorithms for precise system monitoring. It supports multiple safety and performance-enhancing features, including insulation monitoring, system interlock, contactor weld detection, and isolated CAN bus communication.
Certifications / Compliances:
6S-18S
Cells in Series
1-5 VDC
Voltage range
2%
SOC accuracy
CAN & BLE
Communication supported

Product capabilities & features.
Dynamic paralleling
Maxwell’s proprietary algorithms achieve dynamic battery swapping (hot-plugging) using auto-addressing. Scalable architecture supports up to 18 batteries in parallel.
MOSFET based SSR
The FS-XT is designed with integrated MOSFET-based Power Distribution boards up to 120 Amps continuous currents.
Data First Approach
The FS-XT enables you to monitor and log over 65+ battery params every second & transmit via BLE, 4G or CAN
Thermal Runaway Detection
The BMS is capable of detecting a thermal runaway and taking the necessary precautions through state of the art algorithms.
Configurability
Configure 300+ BMS parameters to tweak performance, safety and usability as per your unique application and system requirements.
Configurable CAN
FS-XT's CAN communication protocol is user-configurable for easy interfacing with external CAN nodes.
Customizable battery solutions for every industry
Electric two & three wheelers
Smart battery management solutions for Scooters, Bikes, Motorcycles & Rickshaws, optimizing range, charging protocols & application nuances
Stationary industrial & home storage
Maxwell’s BMS is scalable and designed to manage complex industrial applications such as electric forklifts, excavators, mining equipment, robots, AGV's seamlessly.
Battery energy storage systems
Solutions for systems consisting of multiple modules incorporating Slave BMS connected in series/parallel to form a rack, inturn managed by a Master BMS and connected in a series-parallel fashion to achieve higher voltage and capacity
See what our customers have to say about us
We searched for the best components and technology in the world for our electric scooter, which has been developed to fulfill the highest expectations of the premium urban mobility customer in large European metropolitan areas. Maxwell Energy, with its smart BMS solution, has proven to be the perfect partner for us, and gives us the quality and scalability we need for our growth strategy.

Íñigo Raventós Basagoiti
CEO - Ray Electric Motors
The support and guidance that Maxwell Energy’s team offered to us and our customers throughout the project was invaluable. We have been able to significantly boost our business profitability and are confident about working with more customers to solve pressing battery management problems

Filip Gabryelewicz
Product Manager - Wamtechnik
Tork Motors has been engaging with Maxwell since the very beginning. We knew very early on that the range of features offered by the LT platform would be the best fit for India's first e-Motorcycle. When it comes to safety and reliability we do not compromise and have really high expectations from our suppliers. The Maxwell BMS was successful in not only meeting our expectations but exceeding them in many ways and our motorcycle is now in production with the Maxwell BMS

Kapil Shelke
CEO - Tork Motors