Relocating Boat Batteries: Is It Worth The Effort?

Moving boat batteries can be a good idea for several reasons. It can help with weight distribution, improving the ride quality and handling of the boat. Moving batteries forward can also create more space in the aft compartment and improve self-bailing capabilities. In addition, relocating batteries to a more centralised location can make it easier to access and maintain them. However, there are some potential drawbacks to consider. Moving batteries may require thicker battery cables to control voltage drop, and they must be properly secured to comply with Coast Guard regulations. It is also important to consider the impact of vibration on the batteries and to ensure that the trailer can adequately support the additional weight when the boat is being transported.

Pros and cons of relocating boat batteries

Relocating your boat's batteries can be a great way to improve your boat's balance and performance. Here are some pros and cons to consider before making the change:

Pros:

• Improved balance: Moving batteries forward can help to counter stern weight and level out the boat, improving its ride and handling, especially in choppy waters.
• Better fuel efficiency: A more level boat can also help with fuel efficiency when filling up on the water, as it reduces the risk of fuel spillage.
• More space: Relocating batteries can free up space in the engine bay or other areas, providing more room for storage or other equipment.
• Improved hole shot: Moving batteries forward can help the boat settle quicker and improve its hole shot performance.

Cons:

• Performance loss: Moving batteries forward can result in reduced bow lift, which may lead to a slight loss in top-end speed.
• Rougher ride: In certain boat designs, moving batteries forward can make the ride feel rougher, especially in windy conditions.
• Weight of batteries: Batteries are heavy, and moving them forward may require additional ballast in the stern to counterbalance and maintain optimal boat performance.
• Installation challenges: Relocating batteries requires proper planning and execution to ensure correct cable sizing, secure mounting, and ventilation to prevent gassing and reduce fire risk.
• Cost: Depending on the boat's design, relocating batteries may require purchasing longer cables, battery boxes, and other accessories, increasing the overall cost of the project.

Safety considerations when relocating boat batteries

When relocating boat batteries, there are several safety considerations to keep in mind to ensure optimal performance and mitigate potential risks.

Firstly, it is crucial to select an appropriate location for the batteries. The battery room or compartment should be well-ventilated and dry, with inlet ducts below battery level and outlets at the top of the compartment. This ventilation system helps prevent the accumulation of flammable hydrogen gas released during battery charging, which can cause fires or explosions if ignited. Additionally, ensure that the battery room is not located next to the emergency switchboard and that any pipes penetrating the room use welded joints to prevent leaks that could damage the batteries.

Secondly, use proper battery installation and connection techniques. Secure the batteries in stable locations with proper battery boxes and ensure correct polarity during connection. Use cables of adequate size and connect them securely. If relocating batteries to the bow of the boat, ensure you use thick enough battery cable to control voltage drop and prevent overheating.

Thirdly, prioritize personal safety when working with batteries. Always turn off all power and disconnect the negative terminal before the positive terminal to prevent short circuits. Use insulated tools and personal protective equipment (PPE), including face shields, chemical-resistant gloves, and aprons. Avoid skin and eye contact with sulfuric acid, as it can cause severe burns.

Finally, implement ongoing maintenance and monitoring practices. Keep the batteries fully charged, clean, and dry, with tight terminal nuts and proper electrolyte levels. Regularly inspect connections and battery health, and ensure the battery room is well-maintained, with adequate ventilation and functioning equipment.

How to secure boat batteries

There are several ways to secure boat batteries. One way is to use a battery tray with a strap to secure the battery directly to the floor. Another option is to use a battery box, which contains the battery and can be screwed to the deck of the boat. If using a battery box, it is important to also secure the battery inside the box to prevent it from moving around and potentially cracking. This can be done by placing a non-conductive foam pad inside the box to keep the battery in place or by using a battery hold-down kit with straps. When relocating boat batteries, it is important to use the proper cable size to control voltage drop and to ensure that the batteries are well-ventilated to prevent fire danger.

• Decide on the location for the batteries, taking into account weight distribution and ease of access.
• Choose an appropriate battery tray or box that fits the size and number of batteries.
• If using a battery tray, secure the tray to the floor of the boat using screws or bolts.
• Place the batteries in the tray or box and secure them with straps or a hold-down kit.
• If using a battery box, screw the box to the deck of the boat.
• Ensure that the batteries are connected to the boat's electrical system using the proper cable size.
• Check that the batteries are well-ventilated and that there is no risk of acid spillage.
• Regularly inspect the batteries and their connections to ensure they are secure and in good condition.

Best type of boat batteries for relocation

Relocating your boat's batteries can be a good idea if you need to move weight forward or create more space. However, it is important to consider the implications of this relocation, such as ensuring the batteries are securely mounted and using the correct cable size to control voltage drop.

When it comes to choosing the best type of boat batteries for relocation, there are a few options to consider:

Flooded Lead-Acid Batteries

These are the most common and typically the least expensive type of boat batteries available. They are usually installed by dealerships, so most boats come with this type of battery. While they are cheap upfront, they have a shorter lifespan compared to other options. Flooded lead-acid batteries are a good choice if you are on a budget or selling your boat, as the new owner may not compensate you for a more expensive battery.

AGM Lead-Acid Batteries

AGM stands for Absorbed Glass Matting, which means that the electrolyte in the battery is absorbed into the glass mat instead of sloshing around freely as in flooded lead-acid batteries. AGM batteries generally perform better and last longer, but they also cost more upfront. If you plan on keeping your boat for a long time or use it in demanding conditions, an AGM battery is a good investment.

Lithium Batteries

Lithium batteries are the most expensive option, but they offer the advantage of being significantly lighter than lead-acid batteries and having a longer cycle life. However, it is important to buy from a reputable brand to ensure the quality and longevity of the battery.

When relocating your boat batteries, it is crucial to consider the weight, cable size, and proper ventilation. Additionally, make sure to follow safety guidelines and consult experts or forums for specific instructions regarding your boat model.

Cost considerations for relocating boat batteries

When considering cost, relocating boat batteries can be a more affordable option than buying new batteries. The cost of relocating boat batteries will depend on several factors, including the type and number of batteries, the distance of the move, and the labour involved. Here are some cost considerations for relocating boat batteries:

• Battery Type and Number: The type and number of batteries will impact the cost of relocation. Larger and more specialised batteries will likely incur higher costs due to the need for specific handling and storage requirements.
• Distance: The distance between the old and new battery locations will affect the cost. Longer distances may require more labour and materials, such as longer cables or wiring.
• Labour: The cost of labour can vary depending on the complexity of the relocation and the rates charged by marine professionals. It is recommended to consult with experienced boat electricians or mechanics to ensure safe and proper battery relocation.
• Materials: In addition to labour, the cost of materials should be considered. This includes battery boxes, cables, wiring, connectors, and any other necessary equipment to secure and connect the batteries in their new location.
• Battery Life: Relocating batteries can be an opportunity to upgrade to newer, more efficient batteries. While this may increase the overall cost, it can provide long-term benefits in terms of improved performance and reduced maintenance.
• Customisation: Custom battery boxes or mounting solutions may be required, especially if the new location has limited space or unique dimensions. Customisations can add to the overall cost but can ensure a secure and safe installation.

It is important to carefully plan the battery relocation, taking into account the specific boat configuration and battery requirements. Consulting with marine professionals can help boat owners make informed decisions about the cost and feasibility of relocating boat batteries.

Frequently asked questions