BMS Systems

Active Balance BMS by Balancing Current for LiFePO4 Packs

From 1–2 A standard balancing to 2 A+ high-current traction – one protection platform across compact packs, heavy-duty fleets, and storage systems. Parameters factory-tuned to your cells, inverter, and duty profile.

1–2 A / 2 A+ BalancingActive BalancingCAN / RS485 / BluetoothFactory-Tuned

Quick Configurator

Match your balancing current – standard, high-current, or active balancer – in seconds.

Balancing

1–2 A / 2 A+

Current Range

80–600 A

Communication

CAN / RS485 / BT

Tuning

Per-cell & per-inverter

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Situation

Your pack or storage program needs battery management that survives field conditions – and your engineering team needs protection parameters matched to your specific cells and inverter, not generic defaults.

The Challenge

Generic BMS units ship with one-size-fits-all thresholds. Balancing strategy, overcurrent curves, and temperature protection tuned for a different cell chemistry silently erode capacity and cycle life – and the failure appears as a cell problem, not a BMS problem.

How do you choose an active balance BMS by balancing current – 1–2 A standard or 2 A+ high-current – matched to your LiFePO4 pack and inverter?

Our Answer

SSLBATT active balance BMS spans 1–2 A standard balancing and 2 A+ high-current tiers with CAN/RS485/Bluetooth communication. Protection parameters are validated against your inverter or charger model before sampling – overcurrent thresholds, balancing current, and temperature windows tuned per application. The same BMS platform backs our pack and storage-system lines, so field behavior is already proven at system scale.

Balancing Current Tiers

Choose 1–2 A standard balancing for low-string RV, marine, and off-grid packs, or 2 A+ high-current balancing for heavy-duty traction and storage systems – with CAN/RS485/Bluetooth communication on every tier.

Active Balancing

Active balancers move charge between cells instead of burning it, holding pack capacity available longer in imbalanced or high-utilization duty – the technology behind our long-cycle pack warranties.

Factory Tuning

BMS parameters are validated against your inverter or charger model before sampling, tuning overcurrent, balancing, and temperature protection per application.

Series

Choose by Balancing Current

Six product lines covering consumer packs, storage, traction, standalone balancing, inverter-grade home ESS, and high-voltage systems.

SSLBATT BMS systems organize battery management by balancing current tier instead of part numbers: standard (1–2 A) covers low-string packs, high-current (2 A+) covers traction and storage, and active balancers protect usable capacity. Because the same platform runs inside our packs and storage systems, the protection behavior you qualify is behavior already proven in the field.

0.4–1 AConsumer

JK BMS (0.4–1A) – Consumer

Entry-tier active balance BMS for consumer LiFePO4 packs – e-mobility, portable power, small ESS. Bluetooth, CAN/RS485, 3S–24S.

0.4–1 A balancing40–200 A3S–24S

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1–2 AStandard

JK BMS (1–2A) – Standard

Low-string 12V/24V BMS with 1–2 A active balancing and HEAT heating for RV, marine, and off-grid solar packs.

1–2 A balancing80–200 A4S–16S

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2 A+High-Current

JK BMS (2A+) – High-Current

600 A traction BMS with 2 A active balancing for forklift, AGV, and heavy-duty ESS. CAN/RS485/Bluetooth, 8S–24S.

2 A balancing600 A8S–24S

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0.1–10 ABalancer

JK Active Balancer

Standalone active balancers from 0.1 A to 10 A – recover imbalanced packs, upgrade passive systems, cascade beyond 24S.

0.1–10 AStandalone4S–24S + cascade

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HVHV

JK HV BMS (Master/Slave)

High-voltage master-slave BMS for 80–1000 VDC ESS – 100–200 A master, distributed slave monitoring, 64–256S.

80–1000 VDCMaster / Slave64–256S

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16S–24SInverter

PB Inverter BMS – Home ESS

300 A inverter-grade BMS for 48–72 V residential storage – 2 A active balancing and factory-tested CAN/RS485 mapping for Victron, Deye, Growatt, GoodWe.

300 A continuous2 A balancing48–72 V / 16S–24S

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Why SSLBATT BMS

Proven at System Scale

Our BMS platform is not a catalog part – it is the same management platform factory-installed in our packs and storage systems.

One Platform, Proven

The BMS architecture shipping in our packs and ESS systems is the same platform available to your integration program – field-proven behavior, not lab-only data.

Inverter-Matched Protocols

CAN/RS485 protocol mapping pre-configured to your PCS or inverter model during technical review, before sampling – not discovered during commissioning.

Protection You Can Audit

Overcurrent curves, temperature windows, and balancing strategy documented per configuration – so your engineering team can verify protection behavior before deployment.

OEM Parameter Service

Custom thresholds, communication frames, and housing options for integration programs. Full engineering support from concept to production.

Model Selection

JK BMS Model Comparison

Naming: [Balance Current]-[Series][Current]. BD4A=0.4A, BD6A=0.6A, BD8A=0.8A, B1A=1A, B2A=2A, B5A=5A. Suffix÷10=continuous current (4P=40A, 20P=200A). PB=household ESS; -RP/-XP=relay solutions.

JK Model	Balance Current	Continuous Current	Cell Series	Communication	Typical Application
BD4A-8S4P	0.4 A	40 A	8S	CAN/RS485/BT	E-bike, sightseeing car
BD6A-20S6P	0.6 A	60 A	20S	CAN/RS485/BT	E-bike, sightseeing car
BD6A-24S6P	0.6 A	60 A	24S	CAN/RS485/BT	E-bike, sightseeing car
BD8A-20S8P	0.8 A	80 A	20S	CAN/RS485/BT	E-bike, sightseeing car
B1A-8S10P	1 A	100 A	8S	CAN/RS485/BT	RV, solar, UPS
B1A-8S20P	1 A	200 A	8S	CAN/RS485/BT	RV, solar, UPS
B1A-20S15P	1 A	150 A	20S	CAN/RS485/BT	ESS, energy storage
B2A-8S20P	2 A	200 A	8S	CAN/RS485/BT	RV, solar, UPS
B2A-20S20P	2 A	200 A	20S	CAN/RS485/BT	ESS, energy storage
PB2A16S20P	2 A	200 A	16S	BT, 4.3″ LCD	Household ESS, 48V DIY battery box
B2A25S-RP	2 A	600 A	6S–25S	CAN/RS485	Forklift, AGV, LSEV
B5A4S-XP	5 A	600 A	4S	CAN/RS485	Forklift, AGV (12V battery)
B5A8S-XP	5 A	600 A	8S	CAN/RS485	Forklift, AGV (24V battery)
B2A4S	2 A	Cascade	4S	Bluetooth	Active balance retrofit

Where They Fit

Applications

Architecture patterns proven across our pack and storage-system programs.

Browse Solutions

OEM Packs

Standard or high-current BMS with factory-tuned protection for 12 V–48 V OEM pack platforms, inverter protocol pre-mapped.

Storage Systems

High-current balance BMS scaling across cabinet counts with CAN/RS485 to your PCS/EMS.

Fleet & High-Use

Active balancing holding usable capacity in daily-cycled material handling and LSEV fleets.

Imbalance Recovery

Retrofit active balancers recovering capacity in fielded packs showing capacity divergence.

FAQ

Frequently Asked Questions

What information do you need to tune BMS parameters for my application?

Share your cell model, series-parallel configuration, inverter or charger model, peak and continuous current, and operating temperature range. Our engineering team validates protection parameters against your inverter before sampling and documents the configuration.

Can SSLBATT BMS communicate with my existing inverter or PCS?

Yes. CAN and RS485 protocol mapping is pre-configured to your inverter or PCS model during technical review. We support protocol alignment for major inverter platforms and can implement custom communication frames for OEM programs.

When should I choose active balancing over passive balancing?

Active balancing suits high-utilization and daily-cycling duty where pack capacity is monetized – material handling, LSEV fleets, and storage systems. It moves charge between cells instead of dissipating it, holding usable capacity available longer. For low-utilization backup duty, passive balancing remains cost-efficient.

Is the BMS platform the same one used in SSLBATT packs and systems?

Yes. Our standard, high-current, and active balancer platform is the same management architecture factory-installed across our pack and storage-system lines, so protection behavior and field data are proven at system scale.

Internal Links

Related Products & Solutions

Complete your system with the cells and packs our BMS platform manages.

Cells

LiFePO4 Prismatic Cells

Grade A prismatic cells from 100 Ah to 628 Ah for pack assembly and energy storage.

View cells

Packs

Battery Packs & ESS

12 V–48 V pack platforms with factory-installed BMS – the same platform architecture.

View packs

Systems

Energy Storage Systems

Complete air-cooled and liquid-cooled systems with factory-integrated BMS architecture.

View systems

Request Quote

Request a BMS Fit Check

Share your cell configuration, inverter model, and protection requirements for factory-tuned BMS parameters within 24 hours.