Match it to the cells and the load
Confirm the master and slave control-box roles, cell-monitoring count, contactor and current-sensor architecture, PCS or EMS communication, and project voltage range before ordering high-voltage BMS hardware.
1 / 6High Voltage BMS Control Kit
High Voltage Kit
BCU and BMU control hardware for high-voltage battery systems
Modular BMS control hardware for high-voltage energy storage systems. Select an individual 100A or 200A BCU master control box or BMU slave control box. The price applies only to the selected control box.
- Communication
- CAN ×2 / RS485 ×4 / isoSPI daisy-chain
- Product Type
- High-voltage BMS control hardware
- Order Scope
- One selected master or slave control box per ordered unit
- Battery Included
- No
- Master Control
- BCU-B3 — ISO 26262-oriented design, 1500V detection
Choose configuration
Selected configuration$1,020.00
Shipping is calculated by destination during checkout. PayPal verifies and captures the final amount securely.
Product details
Supply scope and specifications
Key features
- BCU-B3 master control with ISO 26262-oriented functional safety design and 1500V detection
- BMU-H5-16 slave control with ±5mV accuracy and 2A bidirectional active balancing
- SOC / SOH / SOP estimation based on the battery model
- 9 to 16 series cell voltage and 8-channel temperature collection per slave
- Remote OTA and IoT monitoring support depending on final architecture
- CAN / RS485 / isoSPI communication with compatible PCS and EMS equipment
- Supports LFP, NMC, LMO, and LTO battery system designs
Included
- The selected 100A or 200A BCU master control box or BMU slave control box
- Embedded control and communication hardware provided with the selected model
- Standard accessories and documentation listed in the model packing list
- Configuration guidance based on project information supplied by the customer
Not included
- Battery cells, battery modules, and complete battery packs
- Additional master or slave control boxes not selected in the order
- Battery rack, high-voltage cabling, contactors, PCS, EMS, and inverter equipment
- System engineering, onsite installation, and commissioning unless separately quoted
Product TypeHigh-voltage BMS control hardware
Order ScopeOne selected master or slave control box per ordered unit
Battery IncludedNo
Master ControlBCU-B3 — ISO 26262-oriented design, 1500V detection
Slave ControlBMU-H5-16 — 16-cell, 2A active balancing
Voltage Accuracy±5mV BMU / ≤1% BCU total voltage
Current Detection-300A ~ +300A, ≤1% accuracy
Insulation≥20MΩ, high-voltage interlock
CommunicationCAN ×2 / RS485 ×4 / isoSPI daisy-chain
Operating Temperature-25°C ~ +85°C
Detailed product information
Complete visual product guide
Review the full product illustrations, dimensions, component information, and application notes before selecting a configuration.
SELECTION HELP
Check the system requirements before ordering
HIGH-VOLTAGE BMS
BCU vs BMU architecture
Define master and slave roles, module count, cell monitoring, balancing, current, contactors, insulation, PCS, and EMS links.
Read guideCOMMUNICATION GUIDECAN vs RS485 for a BMS
Separate physical interface choice from inverter protocol and system compatibility requirements.
Read guideFIT AND INSTALLATION NOTES
Designing High Voltage Kit into a pack
High Voltage Kit is a JKESS battery and ESS hardware unit. Whether it suits a build is decided by the cells, the load and the enclosure rather than by the model name, so the notes below cover what to settle before ordering and what tends to go wrong after.Why this model matters
High-voltage control hardware is planned at system level, not selected from a page. Pack voltage, cell count, current sensing, contactor rating, insulation monitoring and the PCS and EMS interfaces all have to be settled before the quotation is meaningful.
Application context
Bought for a high-voltage rack where the master controller and the slave monitors are separate boxes. Within the JKESS battery and ESS hardware, that is the job this one is sized for.
Ratings for High Voltage Kit depend on the selected configuration, so take them from the spec table on this page rather than from the model name.
Communication on this unit is CAN ×2 / RS485 ×4 / isoSPI daisy-chain. That establishes what it can speak, not whether a given inverter will answer; the protocol profile, pinout and both firmware versions still decide that.
Decision checks
- Confirm cell chemistry, series count and resting pack voltage before comparing anything else.
- Check mounting position, cable exit direction, airflow and whether the terminals stay reachable after assembly.
- Terminals and harness rated for the current actually planned, not for the board maximum.
- Configuration and destination confirmed at checkout, since shipping rules differ by region.
Model planning
Does this fit the build?
The figures below are the ones that decide whether High Voltage Kit works in a given pack. Read them against the cells and the load before ordering.
- Primary use
- High-voltage BMS control architecture
- Communication
- CAN ×2 / RS485 ×4 / isoSPI daisy-chain
Pre-order checks
- Take the current rating from the spec table above and size cable, terminals and protection against the real load rather than the pack capacity.
- Communication is listed as CAN ×2 / RS485 ×4 / isoSPI daisy-chain. That says what the unit can speak; whether a given inverter answers depends on the protocol profile, the pinout at both ends and the firmware pair.
- Balance requirements come from how well the cells are matched and how much idle time the duty cycle leaves, not from the model name.
- Leave the enclosure question until last and it becomes the expensive one: cable bend radius, airflow and reaching a terminal after assembly are all easier to design in than to retrofit.
System fit checks
Before it ships, and before it powers up
Four things worth settling while the order is still changeable, and one worth doing in the right order once the hardware arrives.
Settle the interface before the pack is closed
The listed communication options are CAN ×2 / RS485 ×4 / isoSPI daisy-chain. Confirm protocol, pinout, baud rate or CAN bitrate, firmware, and inverter compatibility before installation.
Mounting, airflow and reach
Plan the installation around -25°C ~ +85°C operating conditions. Use suitable fusing, cable size, torque, ventilation, insulation, and commissioning checks for the final battery system.
The order that saves a day
Top-balance the cells before the first full cycle. A pack assembled at mixed states of charge will read as unbalanced under load no matter how the BMS is set, and the balancer will spend days correcting what an hour of preparation avoids.
Buying notes
What to confirm before ordering
Practical points buyers raise before paying: where the product comes from, what documentation to check first, how it ships, and how the price is set.
Bought from the factory that builds it
This catalogue is operated by JKBMS Electronic Technology Co.,Ltd rather than a reseller, so model configuration, documentation, and warranty questions are answered by the manufacturer instead of being referred upstream.
Kit freight depends on destination
Battery enclosure kits ship free to the EU. Shipments to the US, Southeast Asia, Japan, Korea, and selected Middle East destinations carry a flat freight charge, and other destinations are quoted manually because of size and weight.
An enclosure kit is not a finished battery
A kit supplies the enclosure and assembly hardware. Cells, BMS, and any display are selected separately, so confirm cell dimensions and series count against the kit before ordering.
Priced per SKU, paid through PayPal
Each configuration is priced separately and the total is re-checked on the server at checkout, so the price shown for the selected SKU is the price charged. Larger quantities are quoted separately through a bulk enquiry.
Product FAQ
Official buying and compatibility notes
What kind of build is High Voltage Kit meant for?
Modular BMS control hardware for high-voltage energy storage systems. Select an individual 100A or 200A BCU master control box or BMU slave control box. The price applies only to the selected control box.
What has to be checked before ordering High Voltage Kit?
Check the port set (CAN ×2 / RS485 ×4 / isoSPI daisy-chain) against the pack you are building. The order that matters: series count has to match the cells, current has to cover the load with margin, and the port set has to leave a free port for whatever the system talks to.
What actually arrives in the box?
The selected 100A or 200A BCU master control box or BMU slave control box; Embedded control and communication hardware provided with the selected model; Standard accessories and documentation listed in the model packing list. Not included: Battery cells, battery modules, and complete battery packs; Additional master or slave control boxes not selected in the order. Where a configuration option changes the contents, the option selected at checkout is what ships.
Who manufactures it and who is shipping it?
JKBMS and JKESS hardware is built by JKBMS Electronic Technology Co.,Ltd. BatteryBoxKit is the storefront that stocks and ships it, so orders leave from held stock and order confirmations come from zhou@jkess.com.
How do ordering, shipping and returns work?
Select the configuration on this page and confirm the destination at checkout, since kit shipping is charged by region. Cells, inverter equipment and on-site work are separate unless the selected package lists them. Return and shipping terms are at https://www.batteryboxkit.com/company/policies.
Get in Touch
Ready to power your future? Contact us for a custom quote or partnership inquiry.
Phone+86 131 6282 8868
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WeChatEmailzhou@jkess.com
LocationBuilding B4, Guangming, Shenzhen, China