24 Volt Lithium Marine Battery For Trolling Motor, Auxiliary Power LIFEPO4 8KWH Lithium Battery, IP67

⚡More Time Fishing & Cruising: With a massive 8KWH capacity, they can stay out on the water all day without worrying about their battery dying.

⚡A Lighter, Faster Boat: Less weight means better handling, higher speeds, and greater efficiency.

⚡Power Everything You Need: From the trolling motor to the stereo, this battery can handle all the modern electronics on board.

⚡A Safer Boating Experience: LiFePO4 chemistry is thermally stable and eliminates the risk of acid spills or hazardous fumes associated with lead-acid batteries.

⚡The Perfect Fit for Their Vessel: With our customization options, you can offer a battery that feels like it was made specifically for their boat model.

⚡Cost Analysis: Why Lithium Saves You Money Over 10 Years While the upfront cost of LiFePO4 is higher, the long-term ROI is unmatched. A standard Lead-Acid or AGM battery typically lasts 300–400 cycles when discharged to 50%. In contrast, the Bonnen 24V 8KWH unit delivers 4,000+ cycles at 80% Depth of Discharge (DOD).

• Lead-Acid/AGM: Requires replacement every 2–3 years due to capacity fade.

• Bonnen Lithium: Designed for 10+ years of service. You would need to buy 8–10 sets of lead-acid batteries to match the lifespan of a single Bonnen Lithium unit.

• Stable Voltage: Experience consistent 25.6V power throughout your trip. Traditional batteries drop voltage as they drain, causing your motor to lose power. Bonnen maintains stable voltage maintenance until 0% SOC (State of Charge).

⚡IP67 Waterproofing: Built for Saltwater & Harsh Conditions Marine environments are brutal. Our 24V 8KWH battery is encased in a high-grade, corrosion-resistant aluminium alloy housing. The IP67-rated seal ensures the battery is completely protected against dust and can withstand temporary immersion in water. This rugged build is specifically designed to handle the vibrations of high-speed hulls and the corrosive nature of saltwater spray.

⚡Installation & Scalability: Parallel Support for Huge Power Need more juice? Our internal BMS supports parallel connection, allowing you to scale your energy storage effortlessly. You can connect multiple units to create 16KWH or even 24KWH systems for massive power requirements. In our recent 24V installation on a 25ft center console, we reduced the battery bank weight by 150 lbs, resulting in a noticeable improvement in hole shot and fuel efficiency.

⚡Warranty & Support: As an ISO-certified manufacturer since 2011, Bonnen Battery provides fully certified LiFePO4 solutions compliant with UN38.3, CE, and IEC 62619 standards. Every 24V 8KWH battery is backed by our comprehensive global warranty and technical support team.

✅Trolling motors — reliable high-current supply for long quiet runs.

✅Auxiliary power on yachts & sailboats — run winches, pumps, lighting, fridges, and electronics without switching on the main engines.

✅House battery systems — replace old lead batteries for propulsion support and living-boat power.

✅Hybrid propulsion — use as a buffer or backup in hybrid electric boat systems.

✅Deck and dock equipment — power electric hoists, pumps, and tools.

✅Commercial craft — stable power for workboats, survey vessels, and tender boats.

✅Emergency backup — dependable reserve power for bilge pumps and navigation systems.

✅Tournament Fishing: Lightweight power for bass boats where speed and weight distribution are critical.

✅Commercial Workboats: Heavy-duty cycles for winch operations, communications, and long-shift reliability.

✅Custom marine projects — tailored packs for builders, OEMs, and retrofit projects.

1. Will this 24V battery work with my trolling motor?

Yes, absolutely. This battery is specifically designed for 24V systems. It provides a stable, consistent voltage, which means your trolling motor will perform at its peak power until the battery is nearly empty, unlike lead-acid batteries that get weaker as they drain.

2. How waterproof is this battery, really? Can it handle saltwater?

It’s built for the marine environment. With an IP67 rating, it’s fully protected from dust and can even be submerged in up to one meter of water for 30 minutes. Saltwater spray, rain, and wet conditions on deck are exactly what we designed it to handle.

3. How long can I expect this 8KWH battery to last on a single charge?

With a massive 8,000Wh (8KWH) of energy, this system provides unprecedented autonomy for auxiliary electronics:

• GPS & Fish Finders (Average 50W): 160 Hours of runtime.

• Heavy Duty Winches/Windlass: Reliable high-current bursts without voltage sag.

• Full Cabin Comfort: Power LED lighting, refrigeration, and pumps for days without a recharge.

4. I’m tired of replacing my batteries every few years. How long will this one last?

You can expect this battery to last for years to come. It’s rated for over 4,000 charge cycles. For a typical boater, this can translate to well over 10 years of reliable service, making it a fantastic long-term investment.

5. Is this battery safe for my boat? I’ve heard stories about lithium batteries.

Your safety is our priority. This battery uses LiFePO4 (Lithium Iron Phosphate) chemistry, which is the safest and most stable type of lithium battery available. It has a built-in Smart Battery Management System (BMS) that prevents over-charging, overheating, and short-circuits. There’s no acid to spill and no explosive gases.

6. My boat is big and I need more power. Can I use more than one?

Yes, you can. These batteries are designed to be connected in parallel. If you need 16KWH of power, simply install two. If you need 24KWH, install three. It’s an easy way to scale your power system as your needs grow.

7. Why should I switch from my old lead-acid batteries? What’s the real benefit?

The main benefits are performance and convenience. This single battery weighs significantly less than a lead-acid bank of the same capacity, which can improve your boat’s speed and handling. It also charges faster, lasts 10x longer, and provides full power until it’s discharged.

8. Will I need to buy a special charger for this battery?

Yes, to ensure the battery’s health and longevity, you will need a charger specifically designed for LiFePO4 lithium batteries. Using a standard lead-acid charger is not recommended as it can damage the battery and shorten its life.

9. What kind of maintenance does this battery require?

Virtually none. There’s no need to check water levels, clean corrosive terminals, or perform equalization charges like you do with lead-acid batteries. Just keep it charged, and you’re good to go.

10. Can I use this to power my fish finder, radio, and lights at the same time?

Definitely. This is a perfect “house” battery for running all your auxiliary electronics. Its large 8KWH capacity means you can run your navigation systems, lights, bilge pump, and stereo for long periods without starting your engine.

11. This battery seems expensive. Is it worth the upfront cost?

While the initial cost is higher than lead-acid, it’s much cheaper in the long run. Because it lasts up to 10 times longer, you won’t be buying replacement batteries every couple of seasons. When you factor in the better performance and zero maintenance, it provides excellent value.

12. Is it hard to install?

Installation ⇱ is straightforward and similar to any other battery. It has standard terminals, but it’s much lighter, making it easier to handle and place in your boat’s battery compartment.

13. Will my boat actually be faster with a lighter battery?

Yes, weight reduction on a boat almost always leads to better performance. By removing the heavy weight of lead-acid batteries, you can expect your boat to be a bit quicker, more agile, and more fuel-efficient.

14. What does the “Smart BMS” actually do for me?

Think of the BMS as the battery’s onboard computer. It constantly monitors the battery’s health and protects it from potential damage. It automatically prevents you from over-charging or draining the battery too far, ensuring it operates safely and lasts as long as possible. You don’t have to do a thing.

Our Hunan-based engineering team designs the Smart BMS firmware with specific protection sets for high-current trolling motor draws, ensuring safety during peak 600A discharges. The system monitors cell balance, over-voltage, under-voltage, and short circuits in real-time.

15. My boat’s battery compartment is an odd shape. Do you offer custom sizes?

Yes, we can. Because we are the manufacturer, we can work with you on custom projects. If you have specific dimensions or capacity requirements for your boat, contact us to discuss a custom-built battery solution.

16. Which 24V battery do I need for a Minn Kota Ultrex 80lb motor?

For a full day of tournament fishing, we recommend the 24V 100Ah. However, if you are doing multi-day trips without charging, the 24V 200Ah or our 8KWH unit is the best choice.

17. Can I replace two 12V AGM batteries with one Bonnen 24V 8KWH unit?

Yes. Replacing two 12V batteries with one native 24V lithium unit simplifies your wiring, reduces points of failure, and saves significant space and weight.

18. How does the BMS protect my battery in winter (low-temp)?

The BMS will automatically prevent charging if the internal temperature drops below 0°C (32°F) to protect the cells. We also offer optional heating film versions for extreme cold climates.

19. Can I use this battery for both starting the engine and the trolling motor?

This specific 8KWH unit is a deep-cycle battery optimized for trolling motors and electronics. For engine starting (cranking), we recommend a dedicated starting battery or a hybrid-rated unit to handle high CCA requirements.