12.8V 100Ah Trolling Motor Smart (100A BMS)
See the LiTime 12V 100Ah TM Bluetooth LiFePO4 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.
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
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
Guidance for this model, with sources linked beside the relevant advice.
Verified against the manufacturer's documentation (rev. 12.8V 100Ah Trolling Motor Smart, 100A BMS; undated 8-page manual), checked 2026-10-01. Manufacturer documentation →
This is LiTime’s 12.8 V 100 Ah TM Bluetooth deep-cycle model, with a 100 A continuous charge/discharge limit. It is separate from the TM Plus and starting-battery ranges. The manufacturer product page identifies it for trolling motors and house loads, expressly excluding engine starting.
The two posts are the complete power interface; Bluetooth requires no external communications cable. Manual pages 2–4 identify M8 × 1.25 terminals and 12–14 Nm tightening torque. Secure the case against movement, seat the cable lugs flat and replace the insulating caps. Provide external battery-cable protection: the internal BMS is not a cable fuse.
Use a LiFePO4 profile at 14.4 V ±0.2 V. The recommended current is 20 A, distinct from the 100 A maximum. Add the outputs of all chargers before checking that limit. Never use lead-acid equalization or desulfation settings on this battery.
Charging is blocked below 0°C and resumes after the cells warm above 5°C; this model does not heat itself. The documented one-second surge is a temporary BMS capability, not a continuous wiring rating. If output disappears, remove the fault or excessive load, inspect battery status in the app, and follow the manual’s recovery procedure rather than repeatedly reconnecting an overloaded inverter.
Build it out
Add 12.8V 100Ah Trolling Motor Smart (100A BMS) 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
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
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pos
positive · bidi
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negative · bidi
Method & provenance
Manufacturer specifications describe the equipment. Crimp calculates cable results from the circuit and assumptions you enter.
From the maker
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
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 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
Open this example as a new project. Add your equipment and cable lengths, then review the sizing and checks for your setup.