Buy as a component, or add a warranty
Same part either way — choose how you want to buy it. The option you pick is printed on your invoice.
MuscleGrid 4S 30A BMS is a compact protection board with a built-in balancer for 12V LiFePO4 packs. It guards against over-charge, over-discharge, over-current and short-circuit while keeping all four cells balanced for longer pack life.
Key features
- 4S LiFePO4 (12V nominal) · 30A continuous
- Built-in balancer — keeps all 4 cells matched
- Full protection: over-charge, over-discharge, over-current, short-circuit
- Compact board — ideal for small 12V builds
- Note: this is a BMS board — not a charger
Ideal for
- 12V LiFePO4 battery builds
- Solar lighting & small ESS
- DIY power boxes & robotics
- Replacement protection board
Specifications
| Type | BMS board with built-in balancer |
| Supported cells | 4S LiFePO4 (12V nominal) |
| Continuous current | 30A |
| Chemistry | LiFePO4 (LFP) |
| Balancing | Built-in passive balancer |
| Protection | OCP / OVP / UVP / SCP |
| In the box | BMS board + leads |
📄 Download datasheet (PDF)
Accessory / spare part — please read. This is a component sourced from third-party manufacturers and sold under the MuscleGrid label; it is
not manufactured by MuscleGrid. It is supplied as a part for
DIY, integration, repair and professional assembly — not a finished, certified consumer appliance — and is
not BIS-certified by MuscleGrid. The buyer is responsible for correct, safe installation and for any compliance required in their application. Sold with
dead-on-arrival (DOA) cover only — if it arrives defective, damaged in transit or is the wrong item, tell us within 48 hours with an unboxing photo/video and we replace or refund it. No change-of-mind returns and no performance warranty beyond DOA. Shipping is charged at actuals. See our
Accessories & Spare Parts Policy.