HV BMS · Master/Slave · 80–1000 VDC

HV BMS Master-Slave Architecture for High-Voltage Energy Storage

Q: What voltage range does the HV BMS support?

The platform is engineered for 80–1000 VDC bus voltages, compatible with 64–256 cells in series across LiFePO4 and other battery chemistries.

Q: How do master and slave modules communicate?

Slave modules measure cell voltage and temperature locally and report to the master over a daisy-chain. The master publishes CAN/RS485 telemetry to your PCS or EMS.

Q: Can the HV BMS scale to multi-cabinet systems?

Yes. Add slave modules per cabinet or series count – monitoring scales without redesigning the master's system logic.

Q: What certifications does the HV BMS carry?

Standard documentation includes CE, UN38.3, and MSDS. Additional certifications can be aligned during the technical review phase for your target market.

Master controllers and distributed slave modules for 80–1000 VDC high-voltage ESS. Centralized protection logic with cell-level voltage and temperature monitoring across 64–256 cells in series.

80–1000 VDCMaster / SlaveCAN / RS48564–256 Cells

Quick Configurator

Match your high-voltage architecture – master, slave, or both – in seconds.

Architecture

Master + Slave

Voltage Range

80–1000 VDC

Communication

CAN / RS485

Cell Monitoring

64–256S

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Situation

Your utility or C&I energy storage project needs battery management for a high-voltage DC bank – hundreds of cells in series, 80–1000 VDC bus voltage – where centralized control and distributed monitoring must work as one system.

The Challenge

High-voltage stacks fail fast when protection logic and cell monitoring are split across mismatched boards. Communication drops between master and slave modules, insulation faults go undetected, and one unmonitored cell becomes a thermal event – with hundreds of kWh at stake.

How do you deploy a high-voltage BMS with centralized master control and distributed slave monitoring for a 80–1000 VDC storage system?

Our Answer

SSLBATT HV BMS uses a master-slave architecture: a master controller (100 A–200 A) handles system logic, contactor control, and CAN/RS485 communication, while distributed slave modules monitor cell voltage and temperature locally across 64–256 cells in series. The platform is engineered for 80–1000 VDC bus voltages in containerized and industrial ESS deployments.

Master Controller

The master unit centralizes protection decisions, drives external contactors, and publishes CAN/RS485 telemetry to your PCS/EMS. Current ratings from 100 A to 200 A continuous.

Distributed Slave Modules

Slave modules sit at the cell pack and measure voltage and temperature locally, reporting to the master over a daisy-chain – scaling from compact stacks to multi-cabinet systems without redesign.

High-Voltage Protection

Overvoltage, undervoltage, overcurrent, short-circuit, and insulation monitoring across the full 80–1000 VDC range, with pre-charge control to protect downstream PCS equipment.

Series

Choose Your HV BMS Architecture

Master controllers and slave modules covering high-voltage storage programs.

SSLBATT HV BMS organizes high-voltage battery management by architecture role: masters define system behavior, slaves scale cell-level monitoring. Because the same platform is engineered for 80–1000 VDC stacks, the protection behavior you qualify is behavior proven across containerized and industrial storage programs.

MasterMaster

HV Master BMS Controllers

SSLBATT-HV-M200 (200 A) and M100 (100 A) with centralized protection, contactor drive, and CAN/RS485/Daisy telemetry for 80–1000 VDC PCS/EMS.

100–200 A80–1000 VDCCAN/RS485

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SlaveSlave

HV Slave BMS Modules

SSLBATT-HV-S16 (16S, 2 A active balance) and S24 (24S, bidirectional) per-cell monitors daisy-chained to the HV master.

Cell monitoringDaisy-chain64–256S

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Why SSLBATT HV BMS

Engineered for High-Voltage Reliability

Centralized control with distributed monitoring – the architecture behind utility-scale and industrial storage.

Single Responsible Platform

Master and slave boards are matched and tested as one system – no vendor-interface risk between a control box and third-party monitoring modules.

Full Voltage Range

Engineered for 80–1000 VDC bus voltages, compatible with 64–256 cells in series across LiFePO4 and other chemistries.

PCS/EMS Integration

CAN/RS485 protocol mapping pre-configured to your PCS or EMS model during technical review – not discovered during commissioning.

Pre-Charge Control

Integrated pre-charge circuit limits inrush current, protecting contactors and downstream PCS equipment on system start.

Comparison

HV BMS Architecture

Match master and slave roles to your high-voltage system topology.

View specifications

Parameter	HV Master (M200 / M100)	HV Slave (S16 / S24)
Role	System logic & protection, contactor drive	Per-cell voltage & temperature acquisition
Voltage Range	80–1000 VDC / up to 1000 VDC	0–5 V per cell
Communication	CAN / RS485 / Daisy / RJ45	isoSPI daisy-chain / CAN
Balancing	n/a (contactor drive)	2A active / bidirectional <200mA
Current Rating	200 A / 100 A continuous	Signal-level
Best Fit	Container/industrial ESS	Multi-cabinet systems
Voltage Accuracy	±0.5% FS (M200) / ≤5 mV (M100)	±2 mV @25 °C
Operating Temp	-20 ~ +65 °C	-25 ~ +85 °C (S16) / -40 ~ +65 °C (S24)
Protection Class	IP54	On request
Dimensions	482 × 550 × 265 mm (M200) / 482 × 398 × 175 mm (M100)	On request
Weight	~18.5 kg (M200)	On request

Where They Fit

Applications

High-voltage storage programs across utility and industrial deployment.

Browse Solutions

Containerized ESS

Utility-scale container storage with 80–1000 VDC stacks and centralized master control.

C&I Storage

Commercial and industrial systems with distributed slave monitoring across multiple cabinets.

Grid-Side Storage

Frequency regulation and renewable smoothing for grid-connected high-voltage systems.

Microgrid

High-voltage microgrid storage paired with PCS/EMS for islanded and grid-tied operation.

FAQ

Frequently Asked Questions

What voltage range does the HV BMS support?

The platform is engineered for 80–1000 VDC bus voltages, compatible with 64–256 cells in series across LiFePO4 and other battery chemistries.

How do master and slave modules communicate?

Slave modules measure cell voltage and temperature locally and report to the master over a daisy-chain. The master publishes CAN/RS485 telemetry to your PCS or EMS.

Can the HV BMS scale to multi-cabinet systems?

Yes. Add slave modules per cabinet or series count – monitoring scales without redesigning the master's system logic.

What certifications does the HV BMS carry?

Standard documentation includes CE, UN38.3, and MSDS. Additional certifications can be aligned during the technical review phase for your target market.

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