If you think it is frustrating when the battery dies on your smartphone, or laptop, imagine what can happen when a marine battery gives up the ghost on a luxury motor yacht!

Batteries play an important role on all vessels, including yachts. Batteries are the heart of any DC electrical system. Your motor yacht’s batteries will store the electrical power from your yacht’s generators or shore-based charging system, for “on demand” use as needed. Most vessels have a traditional 12 volt system that is made up of one or more “banks” of multiple batteries. The electrical system of larger yachts may have 24 or 32 volt systems.

Marine batteries on your yacht can provide electrical power to everything from starting your engines, to the power for lights, computers, and entertainment systems, to alternative “get home propulsion ” systems.

With marine batteries being so critical to a yacht’s or other large commercial ship’s safe operation, there has been ongoing research and development into creating marine battery systems that can last longer, as well as provide more efficient power.

Typical Bank of Marine Batteries

Recently, Norwegian battery maker, Plan B Energy Storage (PBES), announced that it has created “a revolutionary new solution for enhancing the lifecycle benefits of marine battery systems.” They call the solution “CellSwap,’” and it uses a “new method of retrofitting battery systems by replacing battery cells while leaving the rest of the installation intact.” The process, known as “re-coring”, could save up to 60 per cent of the costs of installing a new battery after a five year cycle, greatly enhancing lifecycle value, and lowering yacht maintenance costs.


Commenting on the launch of CellSwap at the industry trade show, Nor Shipping 2017, Brent Perry, CEO, PBES said, “After heavy investment in R&D, CellSwap represents genuinely revolutionary thinking in how marine batteries are designed and, consequentially, operated. By removing the need for full battery replacements, CellSwap delivers significant cost, efficiency and environmental benefits, while crucially enabling ship owners and operators to access the latest fast-moving innovations in battery cell technology when systems are replaced every five years, rather than having to wait for ten years.”

Replacing or Upgrading to New Batteries

The introduction of technology for marine batteries such as the kind described by CellSwap, is important, since the performance and life expectancy of the batteries used on yachts or other vessels is entirely based on how often they can be charged, depleted, and recharged. That is known as the batterie’s “lifecycle.” Anything that can extend a battery’s lifecycle is desirable, particularly to a company that may operate a fleet of commercial ships.

To the everyday yacht owner, you also want to extend the lifecycle of your marine batteries as long as you can. That means, you will want most of the batteries used on your yacht to be “deep cycle batteries,” meaning they can be charged over and over again many times.

The most basic and “standard” marine battery is a lead-acid battery, just like the one you would typically find in your car. Like the one in your car, its charge is maintained through a series of alternators.

If you have a cell phone, laptop, or any other portable device that can be charged and recharged, then you have most likely heard of lithium ion batteries. These are also the kind of batteries that are used in electric vehicles and hybrids. Lithium is attractive for creating batteries, because it is one of the lightest of all metals and has an extremely high electro-chemical potential. Lithium ion batteries are “deep cycle batteries,” that can be made much smaller and in unique shapes than the traditional “lead-acid,” type of marine batteries. But, they are also much more sophisticated than traditional automotive or marine batteries, requiring complex internal circuitry and sensors to keep them operating safely and charging properly. This makes lithium ion battery systems very expensive.

A still efficient, but lower cost alternative to lithium ion batteries for your boat, is an absorbed glass mat battery configuration (AGM). AGM batteries are similar in power and functionality to lead acid batteries, but there is no fluid electrolyte to leak or spill, or evaporate. Instead, the electrolyte is absorbed in a mesh of glass fibers, hence the name “glass mat.” AGM’s are true deep-cycle batteries, and because of their internal configuration, they can be charged with most conventional chargers without fear of damage from modest overcharging, yet they do not require the internal electronics of lithium ion, so tend to be a less expensive option.

More Power to You

Regardless of the type of DC power system you have aboard your luxury motor yacht, FYM’s On Demand Yachting Solution gives “more power to you.”

Signing up for the program means your yacht will always be carefully monitored and well maintained for any issues with batteries, generators or any part of the electrical system. Should your battery system need upgrading or retrofitting, our skilled marine engineers, will be the first to know it, and you can be confident they will make the right recommendations for your yacht and needs. And, you will be able to monitor the entire process through your own proprietary On Demand dashboard!



Operating a motor yacht can be costly. You can reduce your expenses, and avoid costly repairs by keeping her well maintained. On Demand yachting from FYM can help. If you would like to learn more, or if you have any questions or comments about this blog post, do not hesitate to contact our Yacht Management specialists, or call us at (954) 900-9968.