12V vs 24V Trolling Motor: Which is Best for Your Boat

When it comes to running your boat's trolling motor for fishing or other boating needs, the trolling motor batteries play a key role. Different batteries offer different specifications, such as different current capacities and voltage levels. Selecting the right battery voltage for the trolling motor is crucial for improved efficiency and optimal performance.

How to choose the right voltage battery to power your trolling motor? Is this what you have in mind? If so, don't miss this read, as it presents a comprehensive comparison of 12V vs 24V trolling motor battery systems to help you make an informed decision.

This article talks about various parameters of trolling motor batteries, including but not limited to power, performance, battery capacity, runtime, size, weight, and the list continues. It also highlights Renogy marine power and off-grid solutions, such as marine-grade LiFePO4 batteries and off-grid solar kits.

Understanding Trolling Motor Battery Systems

A deep-cycle battery that delivers long-lasting and consistent power to the trolling motor attached to the boat is called a trolling motor battery. As you know, starting batteries are known for starting an engine by delivering a quick burst of energy.

In comparison to this, a trolling motor battery works differently, as it is designed to deliver a steady amount of current over extended periods. This is what makes trolling motor batteries a perfect choice for slow cruising, maneuvering, and fishing.

Common Voltage Systems

Three voltage levels (12V, 24V, and 36V) are usually used to power the trolling motor systems. The requirement of the voltage level depends on the boat's size and the demands of the trolling motor. Let's understand the suitable applications of each voltage system.

• 12V System: It is typically ideal for kayaks or small boats.
• 24V System: It is considered ideal for medium-sized boats, as they provide longer runtime and more thrust.
• 36V System: It delivers the highest power and is commonly used in demanding situations or larger vessels.

Suitability for Different Boat Sizes and Fishing Conditions

12V and 24V systems are a good choice for most recreational boaters and anglers who have small to medium-sized boats. They create a decent balance between cost, simplicity, and performance.

As far as the installation is concerned, installing a 12V system is super simple. It requires one battery only and is an ideal choice for casual use on smaller waters. In contrast, a 24V system needs two 12V batteries connected in series. This system delivers longer run times and increased thrust. If you are seeking extended runtime throughout the day or navigating moderate currents, a 24V system is ideal for your needs.

Selecting the right battery voltage depends on the amount of power required, fishing style, and boat size. Connecting reliable deep-cycle batteries to the trolling motor, like those offered by Renogy, ensures longevity and optimal performance.

Power and Performance

We have to consider a couple of parameters while talking about the power and performance of different trolling motor battery systems, such as thrust, speed capabilities, energy consumption, efficiency, and suitability for various boat sizes.

Comparing a 24V vs 12V trolling motor shows that a 24V system delivers more thrust than a 12V trolling motor. To be exact, a 24-volt motor can deliver up to 80 pounds of thrust, whereas a 12-volt system can only provide 55 pounds of thrust. The increased thrust in a 24V system leads to better control when maneuvering larger boats or in the wind.

In terms of efficiency, 24V systems are more powerful and efficient than 12V systems. 24-volt systems experience less energy loss as heat because they draw less current for the same amount of power. As a result, the motor performance is improved and the battery lasts longer.

If you are searching for a reliable system for calm inland waters, kayaks, or small boats, a 12V system is enough to meet your boating needs. On the other hand, 24V systems are best for situations where more endurance and power are needed. They are ideal for longer fishing trips, moderate currents, and medium-sized boats.

Battery Capacity and Runtime

Let's now compare 12 volt vs 24 volt trolling motor batteries in terms of capacity and runtime. The amp-hour rating of a battery determines how long it can deliver power. The higher the amp-hour rating is, the longer the runtime will be. For example, a 200Ah battery will last longer than a 100Ah battery at the same power consumption.

Connecting two 12V batteries in series doubles the voltage (24V), but it maintains the same capacity. However, a 24V trolling motor draws less current, meaning it is more efficient. Moreover, 24V setups offer extended runtime compared to 12V systems.

A 12V 55lb trolling motor connected to a 100Ah battery may run smoothly for around 4 to 5 hours at a medium speed. In contrast, a 24V 90lb trolling motor may run for 6 to 8 hours. However, the actual runtime depends on the usage conditions.

Size, Weight, and Space Considerations

The comparison of 24V vs 12V trolling motor battery systems reveals that each system has a distinct size and weight. One 12V battery is lighter and smaller than a 24V system containing two 12V batteries wired in series. If you use lithium-ion batteries (like Renogy's Core Series), you will see a minimal difference in weight.

A single 12-volt battery is easier to install on the boat, even in compact compartments. On the other hand, a 24V battery setup needs careful placement and more space for appropriate installation to maintain boat balance effectively.

As stated earlier, a 12-volt system is easier to set up, as it needs fewer components and less wiring. In contrast, the wiring in a 24V system is a bit complex, but you can manage or handle it effectively with proper planning.

Cost Analysis

The initial purchase cost of a 12V system is less because it needs minimal accessories and a single 12V deep-cycle battery. On the other hand, a 24V system needs two 12-volt batteries and a high-end motor. It adds up to the total initial cost.

Lithium batteries (available on Renogy's website) offer low maintenance and a longer lifespan. It compensates for the higher initial cost of batteries over time. Simply put, they are cost-effective in the long run.

A 24-volt trolling motor battery system requires additional connectors, a multi-bank charger, and heavier-gauge installation wire. Though they are additional costs to the entire system, they contribute to enhanced reliability and improved efficiency.

Maintenance and Setup

A 12V system is a simple plug-and-play setup that needs less maintenance. In contrast, a 24V system needs proper balancing, series wiring, and more installation expertise. Therefore, proper maintenance may be needed for 24V systems.

Similarly, if lithium batteries are installed, they need less maintenance than their lead-acid counterparts. Renogy offers maintenance-free and long-lasting LiFePO4 batteries. You can buy them at competitive prices for your boats.

Renogy offers both 12V and 24V battery chargers to power both 12-volt and 24-volt trolling motor battery systems. If you want to upgrade, make sure that the trolling motor supports 24 volts.

Efficiency and Wire Size

Since 12-volt systems draw higher current, they require thicker wire to prevent voltage drop. 24-volt systems can use smaller gauge wire over the same distance, as they draw less current and are more efficient. Whereas, the use of smaller wires in a 12V system may lead to power loss. It happens due to resistance.

Long cable runs are crucial for managing weight and space on your boat. If your boat has long cable runs, a 24V trolling motor battery system reduces the requirement for oversized wiring. It also saves weight and space.

When to Choose 12V Over 24V?

Let's look at the use cases of both 12V and 24V systems one by one.

A 12V system is considered ideal for:

• Short fishing trips
• Limited space
• Tight budget
• Small boats
• Inflatables

A 24V system is suitable for:

• Longer fishing trips
• Mid-sized boats
• More endurance and extra thrust
• Strong currents

Now that you know when to use a 12V system over a 24V system, the parameters given below are crucial to consider before making a decision.

• Boat Size and Weight: Heavier boats and larger vessels need 24V systems for seamless operation.
• Fishing Duration and Frequency: Longer and frequent fishing trips need extra capacity.
• Budget and Upgrade Potential: A 24-volt trolling motor battery system delivers better performance in the long run, whereas a 12-volt system is more cost-effective and easier to install. It shows that 24V systems have more headroom for future upgrades than their 12V counterparts.

Renogy Battery Solutions for Trolling Motors

Are you looking for a marine-grade battery solution for your trolling motor at a reasonable price? Try the Renogy 12V 20Ah Trolling Motor LiFePO4 Battery. It also offers another reliable battery solution with higher current capacity - 12V 100Ah Trolling Motor LiFePO4 Battery.

You need two 12V Renogy batteries with the same current capacity and connected in series to build a 24V system. The incorporation of Bluetooth technology in these batteries enables you to monitor the battery status in real time. In addition, a smart Battery Management System (BMS) protects batteries from extreme temperatures, deep discharges, and overcharging.

Moreover, the Renogy batteries are ideal for marine use, as they are lightweight and designed for waterproofing and to withstand vibrations. Furthermore, they are compatible with all trolling motors (12V, 24V, and 36V) and meet global safety standards.

FAQs about Trolling Motor Battery System

Can I use a solar panel to charge the batteries of a trolling motor?

Yes, you can charge trolling motor batteries with solar power. Renogy offers highly efficient solar panels and premium-quality charge controllers. You can use them to charge batteries.

What size wire do I need for a 24V system?

It actually depends on the cable's length and the current draw. Generally, 6 AWG or 8 AWG wire is enough for most 24-volt trolling motor battery systems. Don't forget to consult the wire sizing chart before you choose.

How long will my battery last?

The life of a battery depends on several factors, such as motor usage and amp-hour rating. Considering the moderate usage, a 12V 100Ah battery may last 4-5 hours, and a 24V battery with the same capacity may last 6-8 hours.

Final Thoughts

Comparing a 12V vs 24V trolling motor battery confirms that the selection of a battery mainly depends on your budget, fishing needs, and boat size. Choosing the right battery and proper wiring are crucial for optimal performance and safety.

Whether you prefer professional assistance or are a DIY installer, always follow the best trolling motor wiring and installation practices to avoid experiencing any unusual circumstances. You can trust Renogy's off-grid and marine power solutions to spend a day on the water reliably.