Boat Batteries: Trickle Charging, Worth It?

Boat batteries can be a tricky business, especially when it comes to keeping them charged and maintained during periods of irregular use or storage. One option to consider is using a trickle charger, which, as the name suggests, slowly charges your boat battery over several days. This is ideal for boat owners who may not use their vessel for weeks or months at a time and want to ensure their battery is ready to go when they are. Trickle chargers are also a good option for preserving battery lifespan, as they don't generate the same amount of heat as standard chargers, which can cause internal breakdown and reduce the battery's overall lifespan.

Trickle chargers preserve batteries

Boat batteries can be kept on a trickle charge to preserve them, especially during the winter months when boats are often stored away. Trickle chargers are designed for long-term use and are ideal for situations where boats are used on and off during the summer or are stored away for the winter.

Trickle chargers work by allowing a small amount of electricity to flow into the battery over several days, slowly charging it. This is in contrast to regular chargers, which provide a rapid charge by delivering a safe amount of electricity over several hours. By reducing the power amount, trickle chargers preserve the lifespan of the battery.

Benefits of trickle chargers

Trickle chargers are beneficial for boat batteries because they do not generate excess heat. Standard chargers can cause the battery to heat up, leading to issues such as internal material breakdown, fluctuations in charge and operational times, and a shorter lifespan. Trickle chargers, on the other hand, keep the battery cool, preventing these issues and extending the battery's life.

Additionally, trickle chargers are convenient for boat owners who may not use their vessels daily or consistently. With a trickle charger, boat owners can ensure their batteries are always partially or fully charged, eliminating the frustration of dead batteries.

Types of trickle chargers

Trickle chargers come in two main types: permanently installed and portable. Permanently installed trickle chargers can be attached to the boat, but they may be challenging to install in small quarters. Portable chargers, on the other hand, can be removed and used to charge the battery when the boat is docked. It is important to note that portable chargers are vulnerable to theft, so they should be kept secure during the charging process.

Solar-powered trickle chargers are also an option for boat owners. Since boat batteries do not require a large amount of amperage, solar energy is sufficient to power a trickle charger. This option is environmentally friendly and sustainable.

The pros and cons of portable chargers

Portable chargers are a convenient way to ensure your boat battery stays charged when you're not using your vessel regularly. They are especially useful for boat owners who only take their boats out on the water occasionally and may encounter dead batteries due to irregular use. Here are some advantages and disadvantages of using portable chargers for your boat batteries:

Pros:

• Portability: As the name suggests, portable chargers can be easily carried and transported, making them ideal for boat owners who need a flexible charging solution.
• Compatibility: Portable chargers usually have built-in USB ports, allowing them to connect to various devices with the appropriate cables. This versatility means they can be used for charging different types of boat batteries.
• Affordability: These chargers are generally reasonably priced, with options ranging from $8 to $20 on average. However, higher-quality portable chargers can cost a few hundred dollars.
• Convenience: Portable chargers eliminate the need to remove your boat battery and charge it separately. They can be used while the battery is still in the boat, making them a time-saving option.
• Slow Charging: Trickle chargers supply a small amount of electricity to the battery over several days, helping to preserve the battery's lifespan. This slow charging process is ideal for boat batteries, as it prevents excess heat buildup, which can be damaging.

Cons:

• Charging Requirements: Portable chargers themselves need to be charged, adding another item to your list of devices that require regular charging. This can be inconvenient if you forget to charge the portable charger before using it.
• Battery Drain: Connecting your boat battery to a portable charger when it isn't necessary can lead to faster battery drain and reduced battery life. It is recommended to only use the portable charger when your boat battery is low on charge.
• Size and Weight: Some portable chargers can be bulky and heavy, making them inconvenient to carry around, especially if you have limited storage space on your boat.
• Theft: Portable chargers left unattended on boats may be at risk of theft, so it's important to keep an eye on them or secure them properly during the charging process.

How to store boat batteries in winter

Storing your boat's batteries correctly over winter is crucial to their lifespan. Boat batteries can be extremely expensive, so getting the most out of them is important. Here is a step-by-step guide to storing your boat batteries over the winter:

Disconnect the battery

First, open the battery compartment and check the battery for any acid leaks and corrosion. Pay special attention to the terminals as these attract the most corrosion and build-up. Gently clean any leaks and build-up with a soft cloth. Next, disconnect the black cable first (the negative terminal). Removing the cable may require additional tools such as a wrench or pliers, depending on your battery model. Take extreme care during this step and make sure that the black cable does not come into contact with the red one.

Remove the battery

After removing the black cable, carefully set it aside and then remove the red cable from the battery. Again, do this carefully and avoid touching the terminals with your bare hands or a conducting material (such as metal). Once both cables are removed, carefully stow them away to avoid accidental contact with the terminals. Cover the terminals with an insulating material, such as rubber covers, to prevent short circuits and accidental electrocution.

Store the battery

Store the battery in a cool, dry place where it won't freeze. It is recommended to store batteries on a wooden surface, in a garage or storage facility. To make charging easier, store the battery somewhere easily accessible. If you live in an extremely cold area, you may want to invest in a battery blanket to keep the battery warm.

Charge the battery

Before storing the battery, give it a final charge. This will help ensure the life and capacity of the battery and will also help prevent it from freezing in cold temperatures. Ideally, trickle-charge the battery or charge it monthly to prevent self-discharge and extend its lifespan.

Use the correct charger

Confirm that your charger is designed for your battery type. Flooded and AGM batteries often require different chargers and algorithms. If you want to be sure that your battery doesn't overcharge, consider using a trickle charger or a smart charger.

The science behind trickle chargers

Trickle chargers are vastly different from standard chargers. While regular chargers offer a safe amount of electricity for rapid charging, trickle chargers allow a small amount of electricity to flow into the battery over several days. This makes them perfect for situations where batteries are used on and off, such as during the summer.

Trickle chargers are designed to slowly charge a battery over time, which can help preserve its lifespan. They are well-suited for long-term use and can be permanently attached to your boat or used as portable chargers. The size of the charger will depend on your power needs.

Most marine batteries have a maximum amperage value of two amps. Your charger should have a corresponding value that is below this number. Trickle chargers have a much lower amperage value, usually around one amp or less, which allows for a slower charge.

One of the benefits of trickle chargers is that they don't generate excess heat, which can cause issues within the battery, such as internal materials breaking down, fluctuations in charge and operational times, and a shorter lifespan. By using a trickle charger, you'll notice that the battery doesn't heat up as much, and it will last longer.

Most trickle chargers plug into a wall for power, but solar alternatives are also available. Solar energy is sufficient to supply the trickle charger since your battery does not require a large amount of amperage. This sustainable option is environmentally friendly and can help keep your boat ready for its next outing.

Solar-powered alternatives

Solar panels can be used to charge all types of marine batteries, including starter, deep cycle, and dual-purpose batteries. When choosing a solar panel, it's important to consider the size and number of batteries in your boat, as well as the amount of energy you need and the amount of sunlight available.

• Battery: Determine the type of battery in your boat to choose the right solar panel.
• Marine solar panels: You'll need one or more solar panels to harness power from the sun.
• Charge controller: This regulates the amount of energy going to the battery, preventing overcharging and prolonging battery life.
• Battery and adapter control cables: You'll need power cables for both the adapter and the battery.

When setting up your solar panel system, follow these steps:

• Choose a location for your solar panel that receives ample sunlight and is protected from the elements. Ensure proper ventilation and accessibility.
• Connect the charge regulator to the battery, hooking the cables into their respective positive and negative ports.
• Connect the solar panel to the charge controller by attaching the positive and negative terminals to their respective connectors. Ensure all connections are tight and no bare wires are exposed.
• Turn on the power switch on the charge controller and adjust the settings as needed.

By investing in a solar panel system for your boat, you can enjoy longer boat excursions without worrying about battery life or power conservation.

Frequently asked questions