The 200A high voltage master BMS is the switching and control layer of a battery cluster: one enclosure that carries the main circuit breaker, the pre-charge circuit, current measurement, insulation detection and the cluster control unit. If you are specifying a battery control box for a cabinet or container build, it sits between the cell strings and the PCS and keeps the main circuit in a known state. It is also the layer a battery bms architecture relies on to report cluster status upward over CAN or RS485, so the converter and the site EMS read the same data.
This is a switching and protection assembly, not a bare circuit board. Each numbered block below matches a component in the unit you receive.
Buyer decision: the 200A breaker and the 250A contactors define the continuous-current ceiling of the whole cluster — compare them with your inverter's charge and discharge current before you commit to this rating.
The control box is one link in a chain, not the whole chain. Cell strings feed the BMU or slave boxes, which measure cell voltage and temperature. Those units report upward to the control box, where the built-in BCU aggregates the cluster, runs protection logic and holds the main circuit open or closed. From there a single CAN or RS485 path carries cluster status to the PCS or the site EMS. The control layer is a per-cluster device, while the slave side scales with cell count — so if your design already includes a master BMS with an integrated BCU, adding a second control layer only duplicates protection and wiring.
Two numbers decide the purchase: current and voltage. Check both before you add the unit to a project.
The wiring is standard; the protocol is a project detail. Separate the two before you place an order.
“Please confirm the final configuration, communication protocol, connector requirements and installation conditions before mass production.”
Four common builds, each tied to a confirmed product fact and the decision it forces.
Product factRJ45 CAN interface and RS485, with daisy-chain support for communication with battery management modules and PCS systems.
Buyer decisionName the protocol your converter speaks when you request the quote — a matching physical port does not guarantee a matching protocol.
Product fact200A molded case circuit breaker, 250A charge and 250A discharge contactors, and 0–200A energy storage connectors.
Buyer decisionSize your lugs and cable schedule to the connector family you order, then confirm continuous current stays under the breaker rating.
Product factDC 120–750V working range with a 50A current sensor at ±0.2% accuracy.
Buyer decisionMeasure the full-charge string voltage of the exact configuration you will build and keep headroom at the top of the range.
Product factOEM and ODM custom projects are supported, with CE, RoHS and FCC documentation available per product or project requirement.
Buyer decisionRequest a project quote with volumes and the documentation list your customer's approval process will ask for.
Send your string voltage, continuous current, PCS protocol and cabinet layout. You get a configuration matched to the 200A unit, a quantity-based price and a lead time confirmed by order quantity.
Keep adjacent product options together for a faster catalog comparison.
JKESS 64S/128S/192S/256High Voltage Master and Slave Battery Box Kit CAN/RS485/WIFI/Daisy Chain HV Stacked energy storage system
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Manage high-voltage batteries safely with this 100A master bms featuring integrated pre-charge control for efficient battery management system bms.
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Enhance battery life with 2A active balancing in this slave bms for 16S high voltage. Ideal for modular battery storage system setups.
View productIt is a single enclosure that consolidates the cluster's main circuit protection and control: a 200a molded case circuit breaker, 250a charge and 250a discharge contactors, a pre-charge circuit with a 30a contactor and 50ω resistor, a 150a fuse, a current sensor at ±0.2% accuracy, a 120w/24v power supply, insulation detection and a built-in bcu.
The product description lists a dc 120–750v working range. confirm your string voltage at full charge against that window, with margin, before you order.
Can and rs485, with an rj45 can interface and daisy-chain support for communication with battery management modules and pcs systems. the protocol profile must be confirmed when the order is placed.
No. cells and complete clusters, the pcs, external battery and pcs power cables, external communication cables, the cabinet or rack, an lcd display unless specified, external iot monitoring and site commissioning are not included unless quoted.
Yes. oem and odm custom projects are supported, and ce, rohs and fcc documentation can be provided per product or project requirement. final configuration, protocol, connectors and installation conditions are confirmed before mass production.
Pricing is project-based: request a quote for the configuration and quantity you need, and lead time is confirmed by order quantity. the product page lists an eu warehouse as the shipping origin.
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