The JK-B2A8S20P Smart Active Balancer BMS is a premium Battery Management System featuring 2A Active Balancing, 200A continuous current, and 350A peak current
Designed for 4S-8S LiFePO4, Li-ion, and LTO battery packs, it offers advanced battery protection, Bluetooth monitoring, and LCD display support for professional solar, UPS, inverter, and energy storage applications
Product Features
Powerful 2A Active Balancer
The advanced 2A active balancing system transfers energy
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Product Description
Short Description
The JK-B2A8S20P Smart Active Balancer BMS is a premium Battery Management System featuring 2A Active Balancing, 200A continuous current, and 350A peak current. Designed for 4S-8S LiFePO4, Li-ion, and LTO battery packs, it offers advanced battery protection, Bluetooth monitoring, and LCD display support for professional solar, UPS, inverter, and energy storage applications.
Product Features
Powerful 2A Active Balancer
The advanced 2A active balancing system transfers energy between cells efficiently, reducing voltage differences and maximizing battery lifespan.
High Current Capability
Supports 200A continuous current and 350A peak current, making it ideal for high-power inverter and energy storage systems.
Smart Bluetooth Monitoring
Monitor battery voltage, current, SOC, temperature, cell voltages, and alarms directly from your smartphone.
LCD Display Support
Compatible with JK LCD displays for convenient real-time battery monitoring.
Complete Battery Protection
* Overcharge Protection
* Over-Discharge Protection
* Overcurrent Protection
* Short Circuit Protection
* Temperature Protection
* Cell Imbalance Protection
Key Highlights
✅ 2A Active Balancing Technology
✅ 200A Continuous Charge & Discharge Current
✅ 350A Peak Current Support
✅ Bluetooth Mobile App Monitoring
✅ LCD Display Compatible
✅ Supports 4S-8S Battery Packs
✅ LiFePO4, Li-ion & LTO Compatible
✅ Smart Battery Protection System
✅ Overcharge Protection
✅ Over-Discharge Protection
✅ Overcurrent Protection
✅ Short Circuit Protection
✅ Temperature Protection
✅ Extends Battery Life &
Performance
JK-B2A8S20P Technical Specifications
Model: JK-B2A8S20P
Battery Type: LiFePO₄ / Li-ion / LTO
Supported Cell Series: 4S–8S
Nominal Battery Voltage: 12V / 24V
Max Continuous Charge Current: 200A
Max Continuous Discharge Current: 200A
Active Balancing Current: 2A
Communication: Bluetooth, CAN, RS485
Mobile App: Android & iOS
PC Software: Supported
Frequently Asked Questions
The JK-B2A8S20P is a Smart Battery Management System (BMS) designed to monitor, manage, and protect compatible lithium battery packs. It supports 4S to 8S battery configurations, with a 200A continuous discharge rating and 2A active cell balancing.
The JK-B2A8S20P supports 4S to 8S battery configurations, making it suitable for battery packs with 4 to 8 cells connected in series, depending on the battery chemistry and required voltage.
Yes. A 4S LiFePO4 battery has a nominal voltage of approximately 12.8V, making the JK-B2A8S20P suitable for compatible 12V-class LiFePO4 battery systems.
Yes. An 8S LiFePO4 battery has a nominal voltage of approximately 25.6V, making this BMS suitable for compatible 24V-class LiFePO4 battery systems.
The JK-B2A8S20P is rated for 200A continuous discharge current. Actual safe operating current also depends on the battery cells, wiring, connectors, terminals, temperature, and overall system design.
The 2A active balancing function helps reduce voltage differences between individual cells by transferring energy between cells. Compared with lower balancing-current models, a 2A active balancer can provide stronger balancing capability for suitable battery packs.
2A active balancing can help:
Reduce voltage differences between cells
Improve battery pack balance
Improve usable battery capacity
Maintain more consistent cell voltages
Improve overall battery performance
Support better battery management
Provide stronger active balancing for suitable battery packs
Yes. The JK-B2A8S20P can be used for compatible LiFePO4 battery applications, provided the correct battery chemistry, series configuration, and BMS parameters are selected.
The BMS can be used in various compatible lithium battery applications, including:
LiFePO4 battery packs
Solar energy storage systems
Inverter batteries
Home energy storage
Custom lithium battery packs
EV and electric vehicle applications
High-current battery systems
Yes. It can be used in compatible solar energy storage and inverter battery systems. Its 200A current rating makes it suitable for high-current applications when the battery cells, cables, inverter, and other components are properly matched.
Yes, where the battery voltage and current requirements are compatible. The BMS can be used for suitable EV and electric bike battery applications. Always match the BMS rating with the battery cells, motor controller, wiring, and required operating current.
JK Smart BMS models may include Bluetooth monitoring and mobile app functionality depending on the exact model and version. Please verify the communication features of the specific product version before purchase.
The BMS is designed to monitor and protect compatible battery systems against abnormal conditions such as over-voltage, under-voltage, over-current, and temperature-related conditions, according to the configured parameters and product version.
Yes, it can be suitable for a 200Ah lithium battery, but BMS selection should not be based only on battery capacity. Battery chemistry, cell configuration, maximum charge/discharge current, and application requirements should also be considered.
No. The 2A active balancing current and 200A continuous discharge rating are separate specifications.
The 2A rating refers to the active cell balancing function, while 200A refers to the BMS's rated continuous discharge capability.
The BMS supports 4S to 8S configurations.
For LiFePO4 batteries, examples include:
4S = approximately 12.8V nominal
8S = approximately 25.6V nominal
Individual cells connected in series can develop differences in voltage and state of charge. Active balancing helps reduce these differences by transferring energy between cells, helping the battery pack operate more consistently.
A higher balancing current can provide stronger balancing capability, but the best choice depends on the battery pack's cell capacity, cell matching, configuration, and application. The 2A active balancing of the JK-B2A8S20P is particularly useful when stronger balancing capability is desired.
Yes. It can be installed in a new compatible lithium battery pack. The battery chemistry, series cell count, current requirements, wiring, and BMS settings must be correctly matched.
The 200A rating represents the BMS's rated continuous discharge capability. However, the complete battery system must also be capable of safely supplying the required current. Battery cells, cables, connectors, terminals, temperature, and installation quality must all be considered.
The JK-B2A8S20P is suitable for users looking for a 200A Smart BMS with 2A active balancing and 4S–8S support for compatible lithium battery systems, including solar storage, inverter batteries, EV applications, and custom LiFePO4 battery packs.
Both models support 4S–8S configurations and have a 200A continuous discharge rating. The key difference is the active balancing current:
JK-B1A8S20P: 200A / 1A Active Balancing
JK-B2A8S20P: 200A / 2A Active Balancing
The JK-B2A8S20P provides a higher active balancing current.
Before purchasing, provide:
Battery chemistry
Battery voltage
Number of cells in series
Battery Ah capacity
Maximum load current
Maximum charging current
Inverter or controller model
Application type
You can purchase the JK-B2A8S20P 200A 2A Active Balancer 4S–8S BMS from Voltpro Energy when the product is available.
Visit www.voltproenergy.com to check product availability, specifications, and purchasing information.
When purchasing, always verify the exact JK-B2A8S20P model, 200A current rating, 2A active balancing, and 4S–8S configuration to ensure compatibility with your lithium battery system.
