Lithium Marine Battery​

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What Makes CoPow Lithium-Ion Marine Batteries Valuable?

With so many marine battery brands on the market, why does CoPow stand out? Here’s why:

1. More Durable

CoPow marine lithium iron phosphate batteries have a deep-cycle life of over 4,000–6,000 cycles, with a service life exceeding 8 years.

2. Lighter

Compared to lead-acid batteries of equivalent capacity, CoPow marine LiFePO4 batteries are 50% to 70% lighter, which not only frees up more cargo space but also reduces the load on the hull.

3. More Stable and Powerful Performance

We use high-quality lithium iron phosphate cells from CATL, BYD, and EVE Energy. In addition to their longevity advantages, these cells also deliver superior power performance. Even when used at very low charge levels or in extremely cold environments, their capacity and power output remain comparable to those at full charge and normal temperatures.

4. Higher Depth-of-Discharge Tolerance

For lead-acid batteries, it is generally recommended to use only about 50% of the charge to extend battery life. For lithium-ion batteries, however, this range can be extended to 80% to 90%, increasing the actual usable capacity.

5. Faster Charging

Lithium-ion batteries, particularly LiFePO4 batteries, can be fully charged in just 3 hours—more than half the time it takes for lead-acid batteries.

6. Superior Corrosion Resistance

Designed for corrosion resistance in aquatic and marine environments, these batteries achieve an IP67 protection rating or higher. We offer a range of options, from duplex stainless steel and 5052 marine-grade aluminum alloy casings to waterproof breather valves.

7. Intelligent BMS Protection System

Every CoPow marine lithium-ion battery is equipped with an intelligent battery management system (BMS) that monitors voltage, current, temperature, and state of charge in real time, and provides protection against overcharging, over-discharging, overcurrent, short circuits, and extreme temperatures.

8. Normal Operation in Low-Temperature Environments

The battery features a cold-cranking current of up to 1200 CCA and is equipped with a preheating system to ensure normal startup and operation in sub-zero temperatures.

9. Extensive Product Specifications and Customization Capabilities

Our marine batteries cover a wide range of mainstream voltage specifications. Additionally, you can submit your customization requests to us. We will develop customized solutions based on your vessel’s space, power requirements, installation methods, and communication protocols.

10. Market-Proven Experience in Marine Applications
Reliability is never achieved through marketing alone, but through long-term validation in real-world environments. Over the past five years, CoPow marine lithium-ion batteries have been deployed in numerous countries and regions worldwide, accumulating extensive experience in applications such as fishing vessels, sport fishing boats, sightseeing boats, and commercial workboats.

Custom Marine Lithium Battery for OEM and Specialized Marine Applications

Let's take a look at what CoPow can do for you:

What certifications do CoPow marine batteries have?

CoPow can provide a range of international certifications and shipping documents tailored to the specific requirements of different countries and projects, including CE, UN38.3, IEC62619, RoHS, UKCA, and MSDS, and issue the relevant test reports required for ocean and air freight.

CoPow has a well-established production process for marine batteries.

As an established manufacturer of marine batteries, we have refined our production processes over many years, and our well-established production lines ensure higher and more consistent product quality.

Customer Reviews from Across the Ocean

Canadian Customer (Low-Temperature Conditions)

“We had always been concerned about how lithium-ion batteries would perform during Canadian winters. But ever since CoPow added the low-temperature preheating feature for us, our vessels have been able to start up normally even on early mornings when temperatures drop to the low teens below zero. Throughout the entire winter, we never experienced a single instance where we were unable to set sail due to battery issues.”

—— Charter Fishing Operator, Ontario, Canada

A Norwegian Customer

“What we’re most satisfied with isn’t the range, but the reliability. Our vessels are in constant use at sea, and the high humidity and salt fog place extremely high demands on the equipment. We’ve been using the battery for over two years, but there’s been no capacity degradation, and its performance has fully met our expectations.”

—— Small Commercial Boat Owner, Norway

Australian Customer (Fishing Boat)

“When using lead-acid batteries, the trolling motor’s power would drop after several hours of continuous operation. However, after switching to CoPow lithium batteries, the voltage output has become much more stable.”

—— Recreational Angler, Queensland, Australia

Customer from Florida, USA (Pontoon Boat)

“The installation process was much simpler than I expected. The biggest difference is the weight—after switching to lithium batteries, the stern became much lighter, and charging is much faster too; I no longer have to wait all night like I used to. Of course, this is a common advantage of lithium batteries.”

—— Pontoon Boat Owner, Florida, USA

FAQ

How Long Do Lithium Marine Batteries Last?

CoPow marine lithium iron phosphate batteries have a cycle life of over 6,000 cycles and, under normal use, can last for more than 8 years.

Can I Replace My Lead-Acid Marine Battery With A Lithium Battery?

In most cases, marine lithium-ion batteries can directly replace existing lead-acid batteries, provided the voltages match.

Should I choose a 12V, 24V, or 36V marine lithium-ion battery?

This depends primarily on the type of boat, the motor power, and the electrical requirements. Small fishing boats and auxiliary equipment typically use 12-volt systems; trolling motors commonly use 24-volt or 36-volt systems; and electric boats, sightseeing boats, and commercial vessels may require systems with higher voltages.

Can marine lithium-ion batteries be connected in series or in parallel?

Yes, we support expanding capacity by connecting multiple sets of batteries in series or in parallel. You can choose the appropriate professional configuration based on your vessel’s propulsion system, voltage requirements, and range needs.

Do CoPow Marine Batteries Have Bluetooth Monitoring?

Allows users to view key data—such as battery voltage, current, SOC, battery temperature, and cycle count—in real time via a mobile app.

Are CoPow Marine Batteries Compatible With Trolling Motors?

It's a perfect fit. Lithium-ion batteries provide a more stable voltage output, so the trolling motor can maintain strong performance even during long periods of continuous operation.

Can CoPow Marine Batteries Be Used For Boat Starting And Deep Cycle Applications?

Yes. CoPow not only offers marine lithium-ion batteries specifically designed for deep-cycle applications, but can also customize high-CCA cold-start batteries according to customer needs, suitable for the starting systems of outboard motors, inboard motors, and other marine engines.

What Is The Difference Between A Marine Battery And A Regular Lithium Battery?

Marine lithium-ion batteries offer superior water resistance, shock resistance, and corrosion resistance, and have been specifically optimized for marine environments, making them better suited for long-term use on ships.

Can Marine Batteries Work With Solar Panels On Boats?

Yes, CoPow marine lithium-ion batteries are compatible with MPPT solar charging systems and are widely used in off-grid marine power supply applications and onboard energy storage systems.

How do I choose the right lithium-ion battery for my boat?

Simply provide details such as the boat model, motor power, operating time, battery compartment dimensions, and installation method, and our engineering team will recommend the most suitable battery solution for you.

We're professional lithium marine batteries manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale lithium marine batteries at competitive price from our factory.