Battery compatibility
Chemistry changes the series range
- Li-ion (ternary/NMC)
- 3–8S
- LiFePO4 (LFP)
- 3–8S
- Lithium titanate (LTO)
- 7–8S
1 / 1Product-family image. Exact SKU appearance and supplied items are not confirmed by this image.
JKBMS JK-B1A / B2A Series
JK-B2A8S20P
JK-B2A8S20P+4.3"Display
JK-B2A8S20P supports 3-8S Li-ion or LiFePO4 and 7-8S LTO packs. The V22.1.1 manual lists 200 A maximum charge/discharge current, 400 A instantaneous current and 2 A active balancing. Bluetooth, UART and display are standard; CAN, RS485 and heating require the corresponding suffix. Confirm V19 versus V22 before choosing dimensions or a harness.
BMS selectorChoose configuration
Selected configuration$124.96
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Selected SKU facts
- Selected model
- JK-B2A8S20P
- Configuration
- JK-B2A8S20P+4.3"Display
- Technical status
- Documented model; confirm shipped revision
- Battery chemistry / strings
- Li-ion (ternary/NMC): 3-8S; LiFePO4 (LFP): 3-8S; Lithium titanate (LTO): 7-8S
- Continuous discharge
- Unknown - factory confirmation required
- Maximum discharge (not continuous)
- 200 A
- Maximum charge
- 200 A
- Active balance
- 2 A
- Documented standard interfaces
- Bluetooth, UART, display interface
- Optional; not confirmed on this SKU
- CAN, RS485, heating control
- Manual basis
- V22.1.1 / V19.2.1
Manual maximum values are not a substitute for cable, terminal, fuse and thermal design.
Manual data is revision-specific. Confirm the shipped label and harness before wiring.
Optional compatible accessories
No confirmed accessory match for this configuration. Request compatibility confirmation.
MANUAL-VERIFIED TECHNICAL REFERENCE
JK-B2A8S20P data by hardware revision
V22.1.1 verifies 3-8S Li-ion/LiFePO4, 7-8S LTO, 200 A maximum charge/discharge current and 2 A active balancing. V19.2.1 has different dimensions, weight, interfaces and wiring, so both revisions are shown separately.
Electrical limits
Use the correct rating label
- Active balance
- 2 A
- Maximum charge
- 200 A
- Maximum discharge
- 200 A
- Instantaneous current
- 400 A
- Supply voltage
- 7.5–36 V
- Cell-voltage accuracy
- ±3 mV
Manual maximum values are not a substitute for cable, terminal, fuse and thermal design.
Interfaces and functions
Standard is not the same as optional
Standard
Bluetooth · UART · display interface
Optional / suffix-dependent
CAN · RS485 · heating control
- CAN, RS485 and heating are suffix-dependent; they are not universal features of the base SKU.
- V19 and V22 connector layouts and harness definitions must be checked separately.
Mechanical and environment
Match dimensions to the label
- V22.1.1
- 160 × 80.78 × 15.1 mm · 358 g
- V19.2.1
- 152.25 × 127.26 × 15.6 mm · 424 g
- Operating temperature
- -30°C to 70°C
- Maximum operating power
- 1.3 W
Configuration suffix guide
Order the interface you actually need
- Base
- Standard configuration
- C
- CAN
- R
- RS485
- CR
- CAN + RS485
- H
- Heating
- HC
- Heating + CAN
- HR
- Heating + RS485
- HCR
- Heating + CAN + RS485
Revision control matters.
- The available documents do not establish that V22 replaces every V19 unit.
- Do not select a communication harness from connector appearance alone.
- The 7.5-36 V supply, up to 1.3 W operating power and V22 mechanical data apply to V22.1.1.
Manual basis
Documents reviewed for this page
- JK-B2A8S-20P User Manual V22.1.1Reviewed pages: 8-9, 16, 20-23
- JK-B2A8S-20P User Manual V19.2.1Reviewed pages: 8-9, 16, 20-23
Before ordering
Four details that prevent the wrong configuration
- Confirm Li-ion, LiFePO4 or LTO chemistry and the exact series count.
- Confirm the V19 or V22 hardware/manual revision from the product label.
- Select the required suffix for CAN, RS485 and/or heating; do not assume these are on the base SKU.
- Check cable size, terminals, fuse, enclosure cooling and expected charge/discharge duty.
Product details
Supply scope and specifications
Key features
- Chemistry-specific support: 3-8S Li-ion/LiFePO4 and 7-8S LTO
- V22 maximum charge/discharge current: 200 A; instantaneous current: 400 A
- 2 A active cell balancing and ±3 mV cell-voltage accuracy
- Base V22 interfaces: Bluetooth, UART and display
- Suffix options: CAN, RS485 and heating in C/R/H combinations
- Revision-controlled dimensions and wiring for V19.2.1 versus V22.1.1
Included
- Selected configuration: JK-B2A8S20P+4.3"Display
- Exact harness and supplied items require confirmation against the packing list.
Not included
- Battery cells, battery enclosure, inverter, charger, and external power cabling
- External contactors, breakers, fuses, and installation hardware unless specified
- Onsite installation, commissioning, firmware setup, or inverter configuration service
Selected modelJK-B2A8S20P
ConfigurationJK-B2A8S20P+4.3"Display
Technical statusDocumented model; confirm shipped revision
Battery chemistry / stringsLi-ion (ternary/NMC): 3-8S; LiFePO4 (LFP): 3-8S; Lithium titanate (LTO): 7-8S
Continuous dischargeUnknown - factory confirmation required
Maximum discharge (not continuous)200 A
Maximum charge200 A
Active balance2 A
Documented standard interfacesBluetooth, UART, display interface
Optional; not confirmed on this SKUCAN, RS485, heating control
Manual basisV22.1.1 / V19.2.1
Exact-model verification
JKBMS JK-B2A8S-20P manuals V22.1.1 and V19.2.1
Manual and wiring libraryCompare this configuration
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