24v trolling motor battery is suitable for trolling motor with 70 ~ 100 trust lbs. But how long will the battery run on the lake? Let’s dive in.
Factors Affecting Battery Run Time
Battery Capacity
The capacity of a battery, measured in amp-hours (Ah), is a primary determinant of how long it will last. A typical 24V trolling motor battery might have a capacity ranging from 50Ah to 100Ah. For example, a 100Ah battery running at a constant 10 amps will last approximately 10 hours.
Motor Usage and Thrust Amperage Draw
The amount of thrust you use directly impacts battery life. Running your motor at full throttle consumes more power, while using lower settings can significantly extend runtime.
Amperage draw refers to the amount of electricity that the motor consumes from the battery to operate. The motor’s amp draw varies based on its speed and any resistance encountered during operation. This information is typically provided by the manufacturer and can be found in the product listing or specification sheet. However, it’s important to note that usually only the maximum amperage draw is listed, which indicates the current the motor requires when running at full speed.
To calculate how long a battery will last or how long your motor will run, you can divide the battery’s amp-hour (Ah) rating by the motor’s amp draw.
Water Conditions
Conditions such as wind, current, and water resistance can affect battery performance. In rough water or against strong currents, your motor will need to work harder, which can drain the battery faster.
Weight and Load
The total weight of your boat, including passengers, gear, and any additional equipment, plays a crucial role. Heavier loads require more power to maneuver, resulting in quicker battery depletion.
Battery Type
Different types of batteries (lead-acid, lithium, AGM) have varying efficiencies and discharge rates.
Lithium batteries, for instance, tend to have deeper depth of discharge (DOD) rate and a longer lifespan that can provide more usable power compared to traditional lead-acid batteries.
Lead acid and AGM batteries DOD is around 50%, if you discharge deeper, it would damage the battery. So if you have a 100Ah AGM battery, the actual using capacity is only 50Ah.
However, LiFePO4 lithium batteries have 100% DOD, a 100Ah lithium battery can be totally discharged without damaging. Therefore, the actual using capacity is 100Ah.
Estimating Runtime
To estimate how long your 24V trolling motor battery will last, you can use the following formula:
Runtime (hours) = Battery Capacity (Ah) / Average Current Draw (A)
For example, if you have a 100Ah battery and your motor draws an average of 20 amps, the calculation would be:
Runtime = 100Ah / 20A = 5 hours
Tips for Maximizing Battery Life
- Monitor Your Usage: Keep track of how much power you’re using during your outing to better estimate future trips.
- Charge Properly: Always ensure your battery is fully charged before heading out. Regular maintenance and charging optimize battery performance and longevity.
- Plan Your Route: Consider the distance and time you plan to spend on the water. If you’re going far or staying out longer, it’s wise to bring a spare battery or plan for a charging opportunity.
Conclusion
In summary, the runtime of a 24V trolling motor battery can vary based on several factors including battery capacity, motor usage, water conditions, weight, and battery type. By understanding these factors and estimating your average power consumption, you can better prepare for your time on the water. Whether you’re fishing or cruising, being informed about your battery’s capabilities will enhance your experience and keep you on the water longer.
