The exact model wins.
Compatibility begins with published maximum current—not a generic thrust chart.
Independent small-boat power notes US / 12V edition
Match your trolling motor to a battery, BMS, breaker, charger, and cable run—using published specs and a runtime range that admits the water will change.
Example: Newport Kayak 55 + 12V 100Ah · mixed use in light chop
Compatibility begins with published maximum current—not a generic thrust chart.
Wind, current, load, speed, and temperature make a single answer dishonest.
When a manual does not cover a decision, the tool says so.
Setup finder / free
Version 1 covers verified 12V transom-mount rigs. Heavier loads are deliberately flagged for a 24V review instead of forced through the wrong formula.
Matched rig
Motor
12V · 36 lb · 29A max
Battery
21.83 lb · BCI Group 24
Why it matched
Prices change. Merchant links are clearly disclosed and never change our compatibility rules.
Starter rigs / source checked
A fast reference for familiar use cases. Open a setup before buying; battery footprint and exact manual revision still matter.
Light kayak
Wind-ready kayak
Freshwater jon boat
Field guide / no folklore
“A 50Ah battery can have enough energy and still be the wrong battery.”
If its BMS cannot continuously clear the motor’s published draw, the system can cut out before capacity is the problem.
Learn battery sizing ↗Field guides / updated August 12, 2026
Battery sizing
Kayak rigging
System voltage
Lithium compatibility
Launch from the numbers
Start with your real loaded weight and the way you expect to use the throttle. The result takes less than a minute.
Build my setup ↑