How To Install A Boat Battery


Much like with the car, you’ll have to replace your current marine battery if it starts to show signs of decay, to avoid possible problems or even being left out in the open water without electricity. This process may sound complicated at first, but it is not, and when you do it once, you’ll be able to do it again without any problem.

This article through the process of boat battery installation, and help you understand marine battery installation better, so when the time comes for you to change it, you won’t be anything but ready for the challenge.

Be Careful!

Remember, you’ll be dealing with the electricity, and underestimating it or acting recklessly around it may cause serious damage to your boat, but it is also extremely dangerous for you. Don’t push your luck or joke around it, take it seriously and do it the way it should be done and there won’t be any problems for you, or your battery.

How To Remove The Old Battery

Before you start your boat battery installation, you’ll have to remove the old one. To do it, the first thing you’ll absolutely, without any exception, do is to turn off all switches your boat has while making sure the engine ignition switch is also off. Once done, you may proceed.

Begin by removing the negative cable, and then securing it so it doesn’t fall loose and make electrical contact. Then, remove the positive cable. Now take the battery out. If you haven’t got a new one already, you may bring it to the store, you may get a discount when buying a new battery. If you already have a replacement, you may find a battery recycle center or ask at the store where to dispose of it. If you’ve been thinking about simply throwing it away to the garbage, don’t do it, because not only most of it could be recycled, but it can be quite harmful because of the chemicals and gasses it contains, so it is better to let the professionals handle it, once the time for the final goodbye comes.

Proper Battery Case Cleaning

Before you start cleaning the battery, mark every cable so you avoid any possible confusion when the time comes to install the new one. It is also important to clean the battery case before you install it. There may be acid traces, so washing it with warm water and baking soda to neutralize the acid effects and possible corrosion is essential. Then, use a stiff brush to remove debris. If you spot signs of corrosion, clean the terminal connectors. But, if cables, connectors, or battery terminals have corroded, they have to be replaced. For your own protection, wear safety goggles and an apron.

Step By Step Guide On How To Install New Battery


There are a few steps you should do to successfully install a new battery:

  • Purchase a new one
  • Replace the wires if needed
  • Strapping
  • Hooking up the battery

Purchasing A New Marine Battery

To install a new one you first have to buy it. When you visit a local battery shop, be careful not to buy the one intended for cars. They look fairly alike, but the marine ones are more endurable because they have to survive extreme vibrations, constant wave pressure and pounding, regular shifting, and above all, they are more powerful and must allow higher draining. Car batteries are not made for any of these, and if you make a mistake you’ll have to buy one probably sooner than later. So, be careful and get the best marine battery for your boat.

Make Sure Wire Size Is Goo

You may need to replace the old wires along with the battery, and it is recommended to get the most fitting ones. If you’re not sure what they are, you may google it or read in the instruction manual what type is recommended. These wires are quite big because they need the capacity to transfer so much energy around the boat. The strength may be between 2 and 6 gauges. In case you have any doubt or you’re not sure what to look for, visit your local battery shop and ask for help, or call the manufacturer and ask what to look for.

Securing The Battery

Before you connect the battery, you’ll have to place it somewhere where it will remain steady so it doesn’t jump around during the waves and another boat movement. If there is a battery cubicle, place it in and strap it tightly to prevent it from moving. If there is no such a thing on your boat, then it should be placed inside of a battery box mounted to the boat, to keep it safe and secure.

Connecting The Battery

Once you’ve done the cleaning and have placed the battery inside its designated place, it is time to hook it up. First, make sure it doesn’t move when inside the cubicle. Then, check the markers and see if their marks. Connect accordingly. Start with the neutral or black cable and connect it to the matching port. Then, it is time to do the same with the positive cable. This way you’ll prevent a spark creation.

Multiple Batteries Installation

Sometimes you may need to install multiple batteries. It is not complicated, but there are some steps to follow. First, when getting the batteries, make sure they are the same type and group. Now, when purchased a second one, strap it to the battery box beside the primary one.

There are two ways to install multiple batteries – parallel installation and series installation.

Parallel Installation

In this system, two batteries are connected positive to positive and negative to negative. The neutral port of the first battery is connected to the neutral or the black port of the secondary battery, while the positive port of the first should be connected to the positive port of the second battery. This way the batteries will have more capacity, longer life, and their amp hour rating will be doubled.

Series Installation

In this type, the positive port is connected to the negative. This may not help the battery to live longer, but it does increase the voltage and keep the capacity steady.

Globo Surf Overview

Marine battery installation is not complicated, but it should be done with precaution, or else you may put yourself in danger, or seriously damage your boat before you’ve even removed the boat cover.

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Globo Surf
My name is David Hamburg. I am an avid water sports fan who enjoys paddle boarding, surfing, scuba diving, and kite surfing. Anything with a board or chance I can get in the water I love! I am such a big fan I decided to start this website to review all my favorite products and some others. Hope you enjoy!