CrimpBattle Born 100Ah
100Ah LiFePO4 with internal BMS, Group 31 size. 100A continuous discharge with a 200A 30-second surge; charge at up to 50A.
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A sizing result with its assumptions attached.
There is no standalone feed to size here: this part either has no positive current-carrying terminal or declares no continuous draw or rated output of its own, so a lone cable number would really be its terminal rating. Its cables are sized by the circuits they serve — use the terminal map and the complete-system fit check.
The part the engine actually sees.
- Nominal voltage
- 13 V
- Capacity
- 100 Ah
- Maximum discharge
- 100 A
Terminal map
| Terminal | Polarity | Direction | Rating |
|---|---|---|---|
| + | positive | bidi | 200 A |
| − | negative | bidi | 200 A |
What belongs around it.
- Terminations matched to each catalog terminal
- Strain relief and terminal protection for the installation
- Connection hardware selected from the complete system topology
See what it changes in your system
With JavaScript enabled, describe your existing boat, van, or off-grid system here. The model supplies topology; Crimp's engine computes the attachment, resized runs, checks, and supporting basket.
Researched notes on the real installation.
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
Verified against the manufacturer's datasheet (rev. 2024-05), checked 2026-08-01. Manufacturer datasheet →
What is known, assumed, and computed.
Catalog profile
The manufacturer, model, ratings and terminal map are maintained as planning data in Crimp's component catalog. Confirm the current manufacturer manual, exact revision and installed nameplate before ordering or wiring.
Engine reference
Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. The published conductor, fuse and voltage-drop result uses the visible reference length and current basis; it is not a universal installation prescription.
Read the complete methodology →