BB10012
Battle Born 100Ah wiring diagram
100Ah LiFePO4 with internal BMS, Group 31 size. 100A continuous discharge with a 200A 30-second surge; charge at up to 50A.
- Nominal voltage
- 12.8 V
- Capacity
- 100 Ah
- Maximum discharge
- 100 A
Wiring diagram
How the 100Ah LFP is wired.
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Cable sizing for this example
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
Cable sizes depend on the connected equipment, current and cable lengths. Add those details in Crimp to size each run.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Verified against the manufacturer's documentation (rev. 2024-05), checked 2026-08-01. Manufacturer documentation →
What it does
Drop-in 12 V / 100 Ah lithium iron phosphate house battery in a Group 31 case, with the BMS built in. The BMS allows 100 A of continuous discharge, tolerates a 200 A surge for up to 30 seconds, and accepts up to 50 A of charge.
Wiring it
Wires like any 12 V battery: positive feed through a fuse close to the post, negative return to the system bus, and interconnects sized for the whole bank's current when batteries are paralleled. Lithium charge profiles are expected from every source — alternator charging goes through a DC-DC charger rather than a direct feed.
What people get wrong
Sizing an inverter against one battery's BMS limit. A 12 V inverter pulling 1500 W draws well over the 100 A a single BB10012 will deliver continuously — the BMS disconnects under a load the inverter is rated to carry. Big inverter loads need the bank paralleled until the combined continuous rating covers the draw, with interconnects sized for the total.
Supporting parts
- Class-appropriate fuse at the positive post, sized to the wire it protects
- A DC-DC charger for alternator charging with a lithium profile
- Interconnect cables sized to the whole bank's current when paralleling
Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
100Ah LiFePO4 with internal BMS, Group 31 size. 100A continuous discharge with a 200A 30-second surge; charge at up to 50A.
- Nominal voltage
- 12.8 V
- Capacity
- 100 Ah
- Maximum discharge
- 100 A
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
+
positive · bidi
−
negative · bidi
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Example sizing. Wire sizes and fuse ratings apply to the connected example, not a fixed cable size for this component. Set your actual equipment, current, lengths and installation conditions in Crimp before choosing hardware.
Read how the sizing worksNext step
Plan your installation with 100Ah LFP.
Open this example as a new project, or add this component to your existing diagram. Use your equipment and cable lengths to review the sizing.
Start drawing, sizing and checking without an account. Your drawing saves in this browser. See Pricing for the equipment allowance and the one-time export offer available to you.