Enerkey 3S/4S 10–80A BMS (Peak 120A) with NTC & Cell Balancing – NMC / LFP / LTO / SIB

Enerkey 3S/4S 10–80A BMS (Peak 120A) with NTC & Cell Balancing – NMC / LFP / LTO / SIB

This Enerkey hardware BMS is built for serious DIY pack builders who need reliable protection for 3-series or 4-series packs in the 12–14.8V range. It supports multiple chemistries—including NMC, LiFePO₄ (LFP), LTO, and sodium-ion (SIB)—when wired and matched correctly to the cell type and voltage.

The board provides over-charge, over-discharge, over-current, and short-circuit protection, plus onboard cell balancing to help keep series cells at similar voltages over time. An NTC temperature input lets you monitor pack temperature and shut down the system if things get too hot.

Key Features

• Supports 3S or 4S lithium packs (select wiring for 3S or 4S)
• Compatible with NMC, LFP, LTO, and SIB chemistries (with correct voltage and cell count)
• 10–80A continuous discharge capability, up to 120A peak (short bursts)
• Integrated cell balancing helps equalize series cell voltages
• NTC temperature sensor input for pack temperature monitoring and protection
• Hardware protection against over-charge, over-discharge, over-current, and short-circuit
• Heavy copper busbars for high-current paths
• Multi-color balance / NTC harness included

Typical Applications

• 3S / 4S 12V power packs
• High-current DC systems up to 80A continuous
• DIY power tool or inverter packs (with proper enclosure and wiring)
• Off-grid / solar energy storage
• RC, robotics, and maker projects

Specifications (Overview)

• Series cells: 3S or 4S
• Chemistries: NMC, LiFePO₄, LTO, sodium-ion (SIB)
• Continuous current: up to 80A (model-dependent)
• Peak current: up to 120A (short duration)
• Protection: over-voltage, under-voltage, over-current, short-circuit, temperature (with NTC)
• Balancing: onboard cell balancing
• Board style: hardware BMS, no Bluetooth app

What’s Included

• 1 × Enerkey 3S/4S 10–80A BMS (Peak 120A) board
• 1 × balance / NTC wiring harness

Important Notes

• Cells, wiring, bus bars, and enclosure are not included.
• This is an advanced DIY product. Incorrect wiring or exceeding the current rating can damage the BMS or your battery and may be dangerous.
• Always fuse your pack appropriately and test with a current-limited power supply on first power-up.

Part of the RenewSpark Enerkey hardware BMS lineup – build smarter, safer packs for your next project.