JKBMS Active Balancer JK-B4A24S — 4A 2~24S Battery Equalizer

JKBMS JK-B4A24S — 4A Active Battery Balancer for 2~24S Packs

When 2A isn't fast enough, the JK-B4A24S steps up. Delivering a constant 4A balancing current via ultracapacitor energy transfer, it handles larger-capacity battery packs that need faster cell equalization — keeping voltage differences minimal and the pack running at full potential.

Designed for 2 to 24 series configurations, the JK-B4A24S supports cascade installation for systems beyond 24S, and includes Bluetooth app monitoring as standard. Optional RS485 or CAN communication allows seamless integration with inverters and BMS systems.

Key Features

• 4A constant active balancing current — twice the speed of 2A models for larger packs
• Supports 2~24S configurations — LiFePO4, Li-ion, LiPo, LTO, lead-acid
• Cascade capable — expand beyond 24S by linking multiple units
• High-precision voltage monitoring — ±3mV accuracy per cell
• Bluetooth connectivity — monitor and configure via mobile app
• Optional RS485 or CAN communication (one of two, select at order)
• Optional temperature sensor input
• Power-on switch — manual control over balancer activation
• Dimensions: 176.6 × 127.3 × 23.5 mm | Weight: 712g

Technical Specifications

• Cell count: 2S ~ 24S
• Balancing current: 4A (constant)
• Cell voltage range: 1V ~ 5V
• Voltage accuracy: ±3mV
• External power supply: DC 9~100V
• Power-on switch: Yes
• Cascade: Supported
• Dimensions: 176.6 × 127.3 × 23.5 mm
• Weight: 712g

When to Choose the 4A Model

• Battery packs with higher capacity cells (100Ah+) where 2A balancing is too slow
• Systems with frequent deep cycling that need faster recovery between cycles
• Applications where tighter voltage consistency is critical under load

Typical Applications

• Large residential and commercial ESS (48V~96V+)
• High-capacity solar storage systems
• Industrial backup power with large cell packs
• Multi-unit cascade installations beyond 24S

📱 Bluetooth App: Available for iOS and Android — monitor cell voltages, balancing status, and configure parameters wirelessly.

⚠️ Shipping Note: Default ships from China. US warehouse stock available upon request — US inventory levels may vary and cannot be guaranteed. Please contact us before ordering if US local shipping is required. WhatsApp: +1 818 938 3175

Need help? Contact us via WhatsApp: +1 818 938 3175 | Email: service@jkbms-ess.com