What Size Lithium Battery for 24V Trolling Motor?

When you're out on the water, a reliable power source is key to a successful day of fishing or cruising. A right size trolling motor is an essential component of boats. In this guide, we'll help you determine what size lithium battery for 24V trolling motor you need and explore the best 24V lithium battery for your trolling motor.

Takeaways

For casual use or short trips with a low to mid-power motor, a 24V 50Ah lithium battery is typically sufficient for 24V trolling motors. If you're using a higher-thrust motor or need longer runtime, upgrade to a 24V 100Ah or higher capacity for optimal performance.

The Advantages of Lithium Batteries for Trolling Motor

Before diving into sizing, it’s worth understanding why lithium batteries are becoming the go-to choice for powering trolling motors:

• More Lightweight: Lithium batteries weigh about 50% less than lead-acid counterparts, reducing overall boat weight and improving efficiency.
• Longer Lifespan: LiFePO4 (lithium iron phosphate) batteries offer 3,000-5,000+ charge cycles at 100% DOD, compared to 300–500 cycles in typical AGM or flooded batteries.
• Higher Efficiency: Lithium batteries maintain a stable voltage output and deliver consistent power without voltage sag.
• Faster Charging: Paired with the right charger, lithium batteries charge much quicker than other types.
• Deep Discharge Capability: Under 1C of discharging, you can use up to 100% of a lithium battery’s rated capacity, while lead-acid batteries only discharged about 50%.

For 24V trolling motors, 24V lithium batteries can provide more stable and long-lasting discharge performance, and significantly improve your overall boating experience, compared to lead-acid options.

When Should You Choose a 24V Lithium Battery for Trolling Motor?

While both 12V and 24V lithium batteries are commonly used for marine and off-grid applications, choosing a 24V lithium battery for trolling motor setups often makes more sense under the following conditions:

1. Higher Power Requirements

A 24V battery delivers more power than a 12V battery of the same amp-hour capacity. This is especially important for larger or heavier boats that need a high-thrust trolling motor (70 lbs or more) to perform well in strong currents or windy conditions.

2. Trolling Motor Compatibility

Some trolling motors are specifically designed to run on a 24V system. In these cases, using a 12V lithium battery simply won’t work—you must use a 24V lithium battery to ensure compatibility and proper operation.

3. Improved Electrical Efficiency

At the same power output, a 24V system draws half the current (amps) of a 12V system. This lower current reduces heat loss in the wiring, minimizes energy waste, and improves the overall efficiency of your trolling motor setup.

4. Space and Weight Efficiency

Using a single 24V battery is often more compact and lightweight than wiring two 12V batteries in series. This is especially helpful in space-constrained boats where every inch and pound counts.

What Size Lithium Battery for 24V Trolling Motor?

To know what size lithium battery for your 24 volt trolling motor, first estimate the required battery Ah (amp-hour) capacity by this formula:

Battery Capacity (Ah) = Motor Amp Draw x Desired Runtime (hours)

Let’s say your 24V motor draws 56 amps at full power, and you want to run it for 2 hours:

56A x 2h = 112Ah

So, you’d need at least a 24V 100Ah lithium battery for 2 hours of full-throttle usage.

However, in real-world conditions, trolling motors aren’t run at max power the entire time. If you're running your motor at lower speeds (for example, 50% throttle), amp draw may be closer to 25–30A. In that case, a 24V 50Ah lithium battery could be sufficient for shorter trips.

Recommended 24V Trolling Motor Battery Sizes by Usage

Read More: What Size Battery for Trolling Motor?

Redodo 24V 50Ah Lithium Battery is designed for 24V trolling motors up to 100 lbs. It provides actual running time that is longer than expected. A boater who bought the battery said:” I use it on a 55lb minn kota trolling motor, and I can fish for 5-7 hours straight on the 50Ah battery. ”

How Many Trolling Motor Batteries Do You Need for 24V Boats?

When sizing your battery system for a 24V trolling motor, you also need to match your battery number or capacity to the motor’s power draw. This ensures you get the runtime and performance needed for your typical boating activities.

Take an example as Redodo lithium batteries, here's a breakdown based on 24V trolling motor power draw ranges:

Can You Use Two 12V Batteries Instead A 24V Battery?

Absolutely. Two 12V 100Ah batteries connected in series will provide 24V and 100Ah. This is a common and flexible setup, especially if you already have 12V batteries on hand or want modular expandability.

However, a dedicated 24V battery has several benefits:

• Simplified wiring
• Fewer connection points (less risk of failure)
• More compact footprint

In summary, both setups can work well, but if you value convenience, space-saving, and cleaner installation, a single 24V battery is often the better choice.

Redodo 24V Lithium Batteries for Trolling Motors

If you’re looking for a reliable and high-performance solution, Redodo’s 24V 50Ah and 100Ah Lithium Battery is purpose-built for marine applications like trolling motors.

Key Features:

• EV-grade LiFePO4 cells with up to 4000+ cycles
• Integrated Battery Management System (BMS) for safety
• IP65 water-resistant casing for marine environments
• Lightweight and compact design (weighs 50% less than lead-acid)
• Support series and parallel (4P4S) for energy expansion
• Feature Bluetooth monitoring and low-temperature protection for 24V 50Ah model

FAQs on 24V Lithium Battery for Trolling Motor

What charger should I use for a 24V lithium trolling motor battery?

Use a lithium-compatible 24V charger with the right voltage cutoff (typically 29.2V). Avoid using a lead-acid charger, which may not charge lithium batteries fully or safely.

How long will a 24V 100Ah battery last with a trolling motor?

It depends on your motor’s amp draw. At 50A draw, a 100Ah battery would last roughly 2 hours. At lower speeds (25A), it could last 4+ hours.

Can I mix battery types in a 24V system?

No. Always use batteries of the same type, capacity, brand, and age when wiring in series. Mixing can cause imbalance and reduce battery life or damage the system.

Conclusion

So, what size lithium battery do you need for 24V trolling motor? It depends on your motor’s amp draw and your desired runtime. For most boaters and anglers, a 24V 50Ah lithium battery hits the sweet spot between power, runtime, and weight. For longer outings or higher-thrust motors, consider upgrading to 100Ah or 200Ah capacity.

By choosing a high-quality LiFePO4 like Redodo’s lithium trolling motor batteries, you gain longer runtimes, faster charging, reduced weight, and reliable performance—keeping your time on the water smooth and worry-free. Upgrade your trolling motor's power today!