Active Balance BMS

Active Balance BMS for Every Pack Architecture

2 A active balancing, CAN/RS485/Bluetooth communication, and 5 purpose-built series covering 4S to 24S LiFePO4 configurations. Reduce balancing time by 60% and extend pack cycle life.

2 A Active BalancingCAN/RS485/Bluetooth4S-24S LiFePO4Poland Local Warehouse

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Match your pack architecture to the right BMS series in seconds.

Strings

4S – 24S

Balance Current

Up to 2 A

Continuous Current

80 A – 600 A

Communication

CAN / RS485 / BT

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Situation

Your engineering or procurement team is specifying a battery management system for a 4S-24S LiFePO4 pack and needs to confirm active balancing performance, communication protocol compatibility, and current handling before selecting a BMS series.

The Challenge

Choosing the wrong BMS creates real problems: passive balancing wastes energy as heat, mismatched CAN/RS485 protocols fail to handshake with your inverter, and under-rated current limits shorten pack life or trip safety protection under load.

How do you choose a smart BMS for your LiFePO4 pack – balancing current, strings, and inverter compatibility?

Our Answer

As a battery management system manufacturer, SSLBATT Smart Active Balance BMS spans five purpose-built series covering 80-600 A continuous current with up to 2 A active balancing for 4S-24S LiFePO4 packs. This supports 8S builds for 24V battery systems through high-current 24S strings for traction or inverter-grade ESS. Pre-mapped protocol support for Victron, Deye, Growatt, GoodWe, SMA, Solis, Huawei, and Schneider reduces integration risk, and CAN/RS485/Bluetooth telemetry provides real-time SOC and cell-level monitoring.

Five Series, One Architecture

PB Inverter for home ESS, High-Current for traction, Low-Series for RV/marine, Relay for external high-power scaling, and a standalone Balancer for service retrofits – so you match current, strings, and protocol to your exact pack.

Active Balancing That Works

Charge is transferred between cells instead of burned as heat – typical efficiency above 85% and ~4x faster balancing than passive, protecting SOC accuracy and usable capacity over the pack life.

Inverter Compatibility

Factory-tested protocol mapping for leading inverters plus custom protocol development for OEM programs, with a Polish Local Warehouse supporting 3-7 Days DDP replenishment for qualified European programs.

Series

Choose Your BMS Architecture

Five purpose-built series covering every LiFePO4 pack configuration – from home ESS to industrial traction.

PB Inverter SeriesHome ESS

Inverter-Grade Smart BMS

300 A continuous, 2 A active balance, CAN/RS485 pre-integrated for Victron, Deye, Growatt inverters. 16S-24S LiFePO4.

300 A cont.2 A balance16S-24S

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High-Current SeriesTraction

Heavy-Duty BMS for Traction

600 A continuous with 2 A active balancing for forklift, AGV, and EV traction packs. 8S-24S configurations.

600 A cont.2 A balance8S-24S

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Low-SeriesRV / Marine

Compact BMS for Low-Voltage Packs

80 A-200 A continuous, 1 A-2 A active balancing for 4S-16S LiFePO4 packs in RV, marine, and off-grid solar.

80-200 A cont.1-2 A balance4S-16S

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Relay SeriesIndustrial

External Relay BMS for High-Power

External relay control for unlimited current scaling. Designed for industrial ESS, telecom towers, and large-scale storage.

Ext. relay2 A balance8S-24S

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Balancer SeriesStandalone

Standalone Active Balancer

2 A-5 A independent active balancer modules for service and maintenance. Works alongside any existing BMS to recover degraded packs.

2-5 A balanceStandaloneRetrofit

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Core Technology

Active Balancing That Works

Passive balancing wastes energy as heat and takes hours. Our active balancing topology transfers charge between cells at up to 2 A – balancing a 16S pack 4x faster than passive alternatives.

Energy Transfer Balancing

Charge from high-voltage cells is transferred to low-voltage cells instead of being burned as heat. Typical efficiency: >85%.

Real-Time Monitoring

CAN/RS485/Bluetooth telemetry provides cell voltage, temperature, current, and SOC data at 100ms polling intervals.

Multi-Protocol Communication

Pre-mapped protocols for Victron, Deye, Growatt, GoodWe, SMA, Solis, Huawei, and Schneider. Custom protocol support for OEM programs.

Multi-Layer Protection

Over-charge, over-discharge, over-current, short-circuit, and temperature protection with programmable thresholds.

Comparison

Series Comparison

Match your pack requirements to the right BMS series.

Parameter	PB Inverter	High-Current	Low-Series	Relay Series	Balancer
Continuous Current	300 A	600 A	80-200 A	External relay	N/A
Active Balance	2 A	2 A	1-2 A	2 A	2-5 A
LiFePO4 Strings	16S-24S	8S-24S	4S-16S	8S-24S	4S-24S
Communication	CAN/RS485/BT	CAN/RS485/BT	CAN/RS485/BT	CAN/RS485/BT	N/A
Application	Home ESS	Forklift/EV	RV/Marine	Industrial	Service

FAQ

Frequently Asked Questions

What is active balancing and why does it matter?

Active balancing transfers energy between cells rather than dissipating it as heat. This means faster balancing (typically 4x faster than passive), no heat buildup, and no wasted energy. For LiFePO4 packs with inherent voltage plateaus, active balancing is critical for maintaining SOC accuracy and usable capacity over time.

How do I choose the right BMS for my pack?

Three parameters determine your BMS selection: (1) String count – determines voltage range; (2) Continuous and peak current – must exceed your worst-case load; (3) Communication protocol – match to your inverter/EMS. The PB Inverter series is optimized for home ESS with inverter pre-integration. High-Current for traction. Low-Series for portable. Relay for unlimited current scaling. Balancer is a retrofit add-on.

What inverters are compatible with SSLBATT Smart BMS?

Our BMS supports factory-tested protocol mapping for Victron Energy, Deye, Growatt, GoodWe, SMA, Solis, Huawei, and Schneider Electric. For OEM programs, we support custom protocol development. Share your inverter model during quotation to receive a pre-configured BMS with verified CAN/RS485 handshake.

What is the lead time and MOQ for Smart BMS orders?

Standard lead time is 2-3 weeks for most models. MOQ starts at 10 units for standard configurations. For qualified European programs, Poland Local Warehouse can support 3-7 Days DDP replenishment. Custom protocol development and OEM branding add 1-2 weeks to the lead time.

Can I use a standalone balancer alongside my existing BMS?

Yes. The balancer series is designed as a standalone add-on for existing packs. It connects in parallel with your current BMS and handles active balancing independently. This is particularly useful for recovering degraded packs or upgrading passive-balance BMS systems to active balancing without replacing the entire BMS.

Internal Links

Explore Related Products

The Balancer Series complements our full Smart BMS lineup. Browse our complete BMS portfolio or explore application-specific solutions.

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Product Family

Smart BMS Series

Full Smart BMS lineup covering PB Inverter, High-Current, Low-Series, Relay, and Balancer – 4S to 24S LiFePO4.

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Product

PB Inverter Series

300 A continuous, 2 A active balance, CAN/RS485 for Victron, Deye, Growatt. 16S-24S LiFePO4.

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Product

High-Current Series

600 A continuous, 2 A active balancing for forklift, AGV, and EV traction packs. 8S-24S.

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Solution

Degraded Pack Recovery

Revive underperforming LiFePO4 packs with standalone active balancing – no BMS replacement needed.

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Request OEM Quote

Factory-direct pricing for Smart BMS orders. Share your pack configuration and target current for a 24-hour engineering fit check.