Eliminate cell voltage gaps and maximize your battery’s lifespan with the JK B2A8S20P Smart BMS. Engineered with industry-leading 2A active balancing technology, this BMS doesn’t just protect your battery—it actively optimizes it by transferring energy from high to low cells. Whether you are building a home energy storage system or an off-grid RV setup, ensure your DIY battery pack performs at its peak.
Key Features & Benefits
- High-Current 2A Active Balancing: Unlike traditional passive balancing that wastes energy as heat, our active energy transfer technology rapidly levels cell voltages, solving capacity “bottleneck” issues in large packs.
- 200A Continuous Current Handling: Robust hardware design supports a massive 200A continuous discharge, making it ideal for high-power inverters and heavy-duty electric loads.
- Real-Time Bluetooth Monitoring: Use the dedicated JK BMS App to monitor voltage, current, SOC, and temperature directly from your smartphone—no complex external wiring required.
- Versatile 4S to 8S Compatibility: A flexible solution that supports LiFePO4, Li-ion, and LTO chemistries for 12V and 24V battery configurations.
- Industrial-Grade Protection: Equipped with precision safety protocols for overcharge, over-discharge, short-circuit, and dual-temperature sensing (NTC) to ensure total system reliability.
- High-Precision Coulomb Counter: Get accurate State of Charge (SOC) readings based on integrated shunt measurements, eliminating guesswork in your energy management.
Technical Specifications
| Parameter | Specification Details |
|---|---|
| Model Number | JK-B2A8S20P |
| Battery Series (Strings) | 4S to 8S |
| Chemistry Support | LiFePO4 / Lithium-ion / LTO |
| Active Balance Current | 0.1A – 2.0A (Software Adjustable) |
| Continuous Discharge | 200A |
| Peak Discharge (Transient) | 350A |
| Internal Resistance | ≤ 0.3mΩ |
| Certifications | CE, RoHS, UN38.3 (Component Level) |
Common Application Scenarios
- Off-Grid Solar Storage: The perfect “brain” for DIY power walls, ensuring 24/7 reliability for residential solar energy backup.
- RV & Marine Electrics: Compact and vibration-resistant, it manages high-capacity lithium banks for long-distance travel and marine house loads.
- Portable Power Stations: Build your own high-output solar generator with professional-grade safety and cell management.
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