⚡ ABYC E-11 Dedicated Estimator

55 lb Thrust Trolling Motor Battery Runtime Calculator

A 55 lb thrust trolling motor is the most popular size for bass boats, jon boats, and kayaks. At full throttle, it draws 45 to 50 Amps at 12 Volts. Use this preset calculator to find your exact hours on the water.

⚡ Instant Estimator

Trolling Motor Battery Runtime Calculator

ABYC E-11 Compliant

1. System Voltage

2. Motor Thrust & Max Amp Draw~50A Max Draw

Custom Max Amps:(Overrides thrust preset)

3. Battery Chemistry & Usable Depth of Discharge (DoD)

Lithium (LiFePO4)100% Usable Capacity

AGM / Lead-Acid50% Safe Usable DoD

4. Battery Capacity (Amp Hours / Ah)100 Ah

20 Ah50 Ah100 Ah (Standard)200 Ah300 Ah

5. Motor Throttle / Speed Level50% Speed (Cruising)

10% (Trolling)25% (Slow)50% (Cruising)75% (Fast)100% (WOT Max)

Estimated Continuous Runtime

Current Draw:-- Amps

Usable Capacity:-- Ah

Continuous Power:-- Watts

Safe Reserve Left:--

Runtime Across All Speeds

Speed 1 (25% Throttle)-- hrs

Speed 2 (50% Cruising)-- hrs

Speed 3 (75% Fast)-- hrs

Speed 4 (100% WOT)-- hrs

🛠️ Recommended Electrical Setup

• Circuit Breaker: 60A Marine Rated
• Minimum Cable Size: 6 AWG (under 10ft)
• Wire Material: Tinned Marine Copper (ABYC BC-5W2)

Frequently Asked Questions

How long will a 100Ah battery run a 55 lb thrust trolling motor?

A 100Ah Lithium LiFePO4 battery runs a 55lb motor for roughly 2.1 hours at 100% wide-open throttle, or 6.5 to 7 hours at half-throttle cruising speed.

What battery size is recommended for a 55lb trolling motor?

A single 12V 100Ah deep-cycle lithium (LiFePO4) battery is the industry benchmark, providing enough power for an entire 8-hour day of typical intermittent bass fishing.