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.
BB10012
Battle Born 100Ah wiring diagram
See the Battle Born 100Ah connection points and wiring example. Open the diagram in Crimp to add your equipment and plan the cables between them.
Open this example as a new project. Use your own parts and cable lengths to make the plan yours.
About this wiring 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.
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.
Installation notes
Connections and installation requirements.
Guidance for this model, with sources linked beside the relevant advice.
Verified against the manufacturer's documentation (rev. 2024-05), checked 2026-08-01. Manufacturer documentation →
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
Build it out
Connect it to the rest of your system.
Add BB10012 to your diagram, then connect your batteries, chargers and loads. Crimp calculates cable sizes and checks the connections as you draw.
Every cable you draw there is sized against ABYC E-11, from the same tables as the reference on this page.
Technical reference
Specifications, terminals and supporting parts.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
- Nominal voltage
- 12.8 V
- Capacity
- 100 Ah
- Maximum discharge
- 100 A
Supporting parts
- A lug or terminal to match each post on the part
- Strain relief and boots so nothing chafes or shorts
- Cable and fuses sized once the whole system is drawn
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
+
pos
positive · bidi
−
neg
negative · bidi
Method & provenance
Where the specifications and sizing come from.
Manufacturer specifications describe the equipment. Crimp calculates cable results from the circuit and assumptions you enter.
From the maker
What the catalog says
Manufacturer, model, ratings and which terminal does what come from the catalog. A newer revision, or the nameplate on the unit in your hand, can say something different — when it does, the nameplate wins.
ABYC E-11
What Crimp worked out
Sized against ABYC E-11 — the US reference, and what Transport Canada accepts as an alternative to TP 1332 for pleasure craft under 24 m. The run length and the current above are what drive the result. Crimp doesn't know how warm your space gets; draw the cable inside an engine-bay zone on the canvas and it sizes for the heat.
Next step
Plan your installation with 100Ah LFP.
Open this example as a new project. Add your equipment and cable lengths, then review the sizing and checks for your setup.