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- Overview
- Related Products
- ✓ BMU-H4-24 Main Unit × 1
- ✓ CAN Communication Cable × 1
- ✓ Power Cable × 1
- ✓ Mounting Brackets & Screw Kit × 1
- ✓ Quick Start Guide × 1
- ✗ Cells / Battery Modules
- ✗ Voltage/Temperature Sense Harnesses
- ✗ Battery Cabinet / Enclosure
- ✗ BCU Master Controller (optional)
- Verify supply voltage is within 9–36V
- Check CAN cable connections
- Confirm cell sense wiring matches channels
- Ensure NTC sensors are 10k@25℃
- Ambient temperature within -40~65℃
- Mount BMU securely inside battery cabinet
- Connect cell voltage sense wires (0–5V)
- Connect NTC temperature sensors
- Connect CAN communication to BCU
- Connect 12V/24V power and check LED status
- Disconnect battery main power before installation
- Never work on live high‑voltage circuits
- Ensure all connections are tight and secure
- Use ESD protection (anti‑static wrist strap)
- Verify communication and voltage calibration after installation
- Project name and description
- Cell type and series (e.g. LFP 24S)
- System voltage (12V/24V/48V)
- Communication protocol (CAN/RS485)
- Temperature and IP requirements
- Voltage channel count (up to 36)
- Temperature channel count (up to 18)
- Custom communication protocols
- Balancing strategy (active/passive)
- Firmware features (specific protection logic)
- Standard lead time: 7–15 working days
- Custom lead time: 15–30 working days
- Shipping: Express / Sea / Air (optional)
- Industrial anti‑static packaging
- Export documentation and customs assistance
by JKBMS Electronic Technology Co., Ltd.
BMU-H4-24 High-Voltage Slave BMU
Reliable · Accurate · Customizable — Cell‑level monitoring and active balancing for energy storage systems
Get a Quote:[email protected]
Why Choose JKESS
Data‑driven results that deliver real value to your energy storage projects
±2mV
High‑Accuracy Voltage Sensing
Cell voltage accuracy of ±2mV ensures precise SOC/SOH estimation and extends battery life
＜1W
Ultra‑Low Standby Power
Static power consumption below 1W reduces system self‑discharge and improves overall efficiency
100%
Full Customization Support
Wide input 9–36V, compatible with 12V/24V systems, flexible for various storage projects
CE · RoHS · FCC
Global Certifications
All core products are CE, RoHS and FCC certified, with independent IP and multiple patents
✓ Independent IP
📦 Packaging & Ordering Notes
Confirm the package contents before placing your order
✅ Included in Package
⚠️ Not Included (Purchase Separately)
🔑 Key Features
Technical advantages designed for B2B energy storage integrators
24‑Cell Voltage Monitoring
Measures up to 24 series cells, 0–5V range, ±2mV accuracy
Multi‑Channel Temperature
Up to 4 NTC inputs, ±1℃ accuracy, -20~65℃ range
CAN Bus Communication
Standard CAN interface with BCU, supports cascading and auto‑addressing
Active Balancing
Bidirectional balancing current ＜200mA, enhances pack consistency
Wide Temperature Range
-40~65℃ operating, -50~105℃ storage, rugged design
Wide‑Voltage Input
9–36V input, compatible with 12V/24V battery systems
Compact Modular Design
176×126×29 mm, IP40, ideal for high‑density cabinet deployment
CE / RoHS / FCC Certified
International approvals ensure global market access and quality
🎯 Pain Points & Solutions
JKESS one‑stop service – from standard products to full‑cycle support
| Common Customer Pain Points | BMU-H4-24 Solution |
|---|---|
| Low voltage accuracy leads to SOC/SOH errors | ±2mV high‑precision sensing across 0–5V ensures reliable state estimation |
| Temperature anomalies go undetected, creating safety risks | Up to 4 NTC channels with ±1℃ accuracy for real‑time thermal monitoring |
| Incompatibility with different voltage platforms | 9–36V wide input supports 12V/24V systems for diverse applications |
| Unstable communication and limited expandability | Standard CAN bus with cascading and auto‑addressing for easy scaling |
| Long customization cycles and slow after‑sales response | JKESS one‑stop service: standard supply + custom engineering + full‑cycle support |
🏭 Applications
BMU-H4-24 serves core energy storage segments
Commercial & Industrial Storage
Peak shaving, demand charge management for factories, campuses, and commercial buildings
Grid‑Side Storage
Frequency regulation, renewable integration, and grid stability support
Battery Pack Integration
Works with LFP, NCM and other chemistries for slave‑level BMS management
Solar‑Plus‑Storage
Combined PV and storage to increase self‑consumption and grid interaction
Containerized ESS
Prefabricated container solutions for rapid, modular deployment
Microgrids
Island, mining, and remote area microgrids to enhance reliability and renewables usage
📋 Technical Specifications
Detailed parameters of BMU-H4-24
| Parameter | Specification | Note |
|---|---|---|
| Product Type | High‑Voltage Slave BMU | 24S slave unit |
| Supply Voltage | 9–36V | Compatible with 12V/24V systems |
| Standby Power | ＜1W | Ultra‑low self‑consumption |
| Cell Voltage Sensing | 24 channels, 0–5V, ±2mV | Expandable to 36 channels |
| Temperature Sensing | 4 NTC, ±1℃ (-20~65℃) | Expandable to 18 channels |
| Balancing Current | ＜200mA | Active bi‑directional |
| Communication | CAN | For BCU master |
| Operating Temp. | -40℃ ~ 65℃ | Wide‑temperature range |
| Storage Temp. | -50℃ ~ 105℃ | — |
| Humidity | 5% ~ 95% | Non‑condensing |
| Ingress Protection | IP40 | — |
| Dimensions | 176 × 126 × 29 mm | — |
| Certifications | CE / RoHS / FCC | International approvals |
🔧 Installation Notes
Correct installation ensures stable operation of the BMU-H4-24
📋 Pre‑Installation Checklist
📌 Key Installation Steps
📐 Installation diagram placeholder
(Image reserved for step‑by‑step guide)
(Image reserved for step‑by‑step guide)
⚠️ Safety Precautions
📐 Selection Guide
Choose the right JKESS BMS configuration for your project
① Define cell count→② Confirm voltage level→③ Choose communication→④ Assess environment→⑤ Specify custom needs
💡 Need professional selection advice? Share your project details (cell type, series, voltage, application, environment) with the JKESS sales team ([email protected]) for a tailored proposal.
📝 Procurement Guide
Prepare your order and customisation requirements
📋 Information to Prepare
⚙️ Customisation Options
🚚 Delivery & Shipping
🔗 Recommended Companion Products
Other JKESS products that work seamlessly with BMU-H4-24
📦
HV Master Control Box
High‑voltage master controller with BCU for cluster‑level management
View Details →
🔋
HV Slave Battery Box Kits
Ready‑to‑integrate slave battery box with BMU and battery pack
View Details →
❓ Frequently Asked Questions
Top B2B questions about the BMU-H4-24
1 How many cells does the BMU-H4-24 support?
It supports up to 24 series cells (expandable to 36 channels).
2 What is the voltage measurement accuracy?
Accuracy is ±2mV across the 0–5V measurement range.
3 Which communication interface does it use?
It uses a standard CAN bus interface for communication with the BCU master.
4 What is the operating temperature range?
Operating: -40℃ to 65℃; storage: -50℃ to 105℃.
5 What is the ingress protection rating?
The device is rated IP54, suitable for indoor & outdoor battery cabinet installation.
6 Is the product certified?
CERoHSFCC Yes, it is CE, RoHS, and FCC certified. JKESS holds independent intellectual property and multiple patents.
7 What is included in the package?
The package includes: BMU-H4-24 main unit ×1, CAN cable ×1, power cable ×1, mounting brackets & screws, and a quick start guide.
8 How can I get a product selection recommendation?
Contact the JKESS sales team ([email protected]) with your project details for professional advice.
9 What is the typical lead time?
Standard lead time is 7–15 working days; custom configurations may take 15–30 days.
10 What after‑sales support does JKESS provide?
JKESS offers full‑cycle support: technical assistance, warranty (12 months standard, extendable), firmware updates, troubleshooting, and spare parts – all backed by CE/RoHS/FCC quality standards.
📰 Industry News
Latest developments in the European and Southeast Asian energy storage & BMS markets
2026-07-24
The European Union has formally agreed on a storage roadmap, requiring 200 GW of installed capacity by 2030, accelerating investments in grid-scale and behind-the-meter storage.
2026-07-20
Analysts forecast that Southeast Asia's energy storage market will triple in capacity by 2028, with Thailand, Vietnam and Indonesia leading the deployment of utility‑scale projects.
2026-07-17
The European Commission has unveiled a €5 billion funding program to support battery storage manufacturing and deployment, aiming to reduce dependence on foreign supply chains.
2026-07-13
Rapid electrification and renewable integration in Asia‑Pacific are fueling demand for advanced BMS solutions, with the region expected to become the largest BMS market by 2028.
2026-07-02
According to the IEA, global investment in energy storage has reached a record $120 billion in the first half of 2026, driven by policy support and declining battery costs, with Europe and Southeast Asia as key growth markets.
