As the shipping industry accelerates its transition to new energy sources, lithium-ion batteries are increasingly becoming the driving force behind this transformation. In the U.S. market, many companies have already accumulated extensive experience in the field of marine lithium-ion batteries, with their products gaining recognition for their performance, safety, and reliability. Notably, XD THERMAL has long provided cooling components for lithium-ion battery applications in the automotive OEM and shipping sectors, and has therefore closely monitored the development of this market. Against this backdrop, I have compiled this list, hoping it will offer some insights as you explore industry trends or seek potential partners.
Trojan’s LiFePO₄ deep-cycle batteries have always been one of their star products, with a capacity of approximately 65Ah and a cycle life of 4,000 cycles, easily lasting 10 years with normal use. More importantly, it is completely maintenance-free and supports opportunity charging, so you don’t have to wait until the battery is completely depleted before recharging it, making it hassle-free and convenient. The battery also features a four-level safety protection system and an intelligent BMS, ensuring reliable performance in marine or other high-demand applications. Recently, Brian Stahl, President of Xtreme Bass, shared his experience using Trojan 36V lithium batteries in marine applications: not only do they provide an exceptionally long runtime (45Ah, with the same 4,000-cycle lifespan), but they also last up to 10 years, are maintenance-free, support opportunity charging, and come with comprehensive safety protections. What’s more reassuring is that these batteries have passed authoritative certifications such as UL, SAE, ETL, FCC, and CE, and come with an 8-year warranty, providing greater peace of mind.
Corvus Energy’s marine lithium-ion battery systems have long been renowned in the industry for their use of LiFePO₄ technology. Their ESS products, including the Orca, Blue Whale, and Dolphin NxtGen series, have been widely adopted in various hybrid and fully electric vessels such as ferries, tugboats, cruise ships, and fishing boats. Recently, there has been a particularly noteworthy development: Corvus will supply a 25 MWh Blue Whale series battery system for the world’s first fully electric offshore workboat (eCSOV) being built for UK-based Bibby Marine. This marks the largest LFP marine battery project globally to date, not only in terms of capacity but also as a significant milestone in the maritime electrification process.
As far as I know, Lithion’s U-Charge® LiFePO₄ modules are already well established in marine applications. They not only power ship propulsion systems but also provide electricity for ship cabins, UPS, and emergency backup power. They can be found in commercial ships, water buses, tugboats, electric ferries, and even private yachts. The battery comes with a built-in BMS, and its modular design allows it to be flexibly scaled from a few kWh to the MWh level. It can be fully charged and also supports opportunity charging, requiring almost no maintenance. What’s more reassuring is that it has obtained international authoritative certifications from ABS and DNV-GL, with a cycle life of up to 10,000 cycles (calculated based on a 70% deep discharge) and a 5-year warranty. In such a complex and dynamic maritime environment, these certifications and design features undoubtedly demonstrate its reliability and safety.
The company’s U-Charge® LiFePO₄ modules are already widely used in the marine sector. Whether it’s commercial ships, water buses, electric ferries, or private yachts, they provide stable support for propulsion systems, cabin power supply, UPS, and backup power. The modular design is also practical, allowing for scalability from kWh to MWh levels to meet the energy needs of vessels of different sizes. Additionally, Lithion has recently successfully passed the ISO 9001 quality management system re-certification, maintaining this international certification. This demonstrates that the company’s management in manufacturing and quality control is consistently stable, giving users greater confidence when making their selection.
Within the shipowner community, Dragonfly’s Battle Born Batteries® are truly a popular choice for LiFePO₄ batteries. Whether it’s speedboats, luxury yachts, sailboats, or commercial vessels, everyone agrees that it’s reliable and hassle-free to use. Its key features include: a safe and stable LiFePO₄ chemical system, UL-certified cells, and Dragonfly’s proprietary intelligent BMS. Not only can it completely replace traditional lead-acid batteries, but it also allows for 100% deep discharge with confidence. Even better, it offers remote monitoring and anomaly alerts, giving those who venture out to sea an extra layer of peace of mind. It’s no wonder Dragonfly won the 2025 “Battery Technology Company of the Year” award—its performance and reputation speak for themselves.
I have always believed that the reason Epoch’s marine lithium-ion batteries have garnered so much attention is largely due to the lithium iron phosphate (LiFePO₄) technology they employ. Compared to traditional lead-acid batteries, their advantages are truly evident: they are nearly 70% lighter in weight, have a lifespan exceeding 5,000 charge cycles, charge faster, maintain stable voltage during use, and can withstand high-current discharge. Additionally, features such as an integrated Battery Management System (BMS), support for deep discharge, and a waterproof housing ensure reliable performance even in harsh marine environments. What’s more, Epoch has recently adjusted its sales model—shifting to a dealer-only distribution channel—with the aim of providing customers with faster support, more stable supply, and a more professional service experience.
Many boat owners mention Abyss Battery’s 12V dual-purpose LiFePO₄ battery when discussing their products. When out at sea, it can easily handle the high current required to start the engine and provide a stable power supply during sailing or fishing. Most importantly, even when encountering rough seas and shocks, the battery remains stable, so there is no need to worry about it suddenly failing. One battery meets two needs, saving time and effort. Their newly launched 24V and 36V trolling motor batteries have also caught the attention of many anglers. With their lightweight design and long-lasting battery life, they perfectly meet the demands of extended fishing trips at sea. For those who love to go out to sea, such batteries are not just equipment—they are reliable companions throughout the journey.
In fact, Monster Marine’s LiFePO₄ marine batteries have always been quite popular among boat owners. They are lightweight, durable, and easy to use, providing stable power for trolling, speedboats, and sailboats alike. This gives boaters peace of mind while sailing and makes their trips much more enjoyable. Recently, they have also collaborated with the legendary figure in the fishing world, Bill Dance Outdoors. This partnership has not only drawn more attention to their brand among fishing enthusiasts but also reinforced the perception that they are indeed reliable in the field of marine lithium-ion batteries.
In fact, PowerHouse’s marine lithium-ion batteries are not just for fishing. Their 12V and 36V deep-cycle batteries can reliably power navigation lights, GPS navigation, communication devices, and even propulsion systems. What’s even more convenient is that they can be flexibly configured into 24V or 36V systems, making them compatible with speedboats, sailboats, and workboats, giving boat owners peace of mind and reducing concerns while at sea. Recently, they published an article titled “10 Reasons Why Investing in High-Quality Marine Batteries Is Worth It.” The insights shared in the article are quite compelling: a reliable battery not only saves you time and money but also prioritizes safety. For those who spend most of their time on the water, such assurance is truly invaluable.
I've worked in battery thermal management for over 6 years, handling lots of international projects. If you're curious about battery liquid cooling products or services, feel free to ask me any questions!
