Should boat batteries be on when connected to shore power?

When it comes to boat batteries, there are a lot of different opinions about whether they should be on or off when connected to shore power. Some boaters argue that leaving your boat batteries on can help keep them charged and healthy, while others say that keeping them off is safer and more efficient.

So, which is the right approach? Ultimately, it depends on your specific situation and the type of boat you have.

If you have a larger boat with a lot of electrical components, such as refrigerators, air conditioning units, and other appliances that require power even when your boat is moored, then leaving your batteries on when connected to shore power can be a good idea. This ensures that all of your electrical systems continue to function properly, and it will keep your batteries topped up and ready to go when you’re ready to set sail.

However, if you have a smaller boat or one that doesn’t require a lot of power when you’re not using it, then turning off your boat batteries when connected to shore power can be a smart move. This will prevent any accidental discharge of power, which can lead to battery damage or even fire hazards.

Another factor to consider is whether your boat has a built-in battery charger. If it does, then leaving your batteries on can help keep them fully charged and in good condition. However, if your boat doesn’t have a charger, leaving your batteries on could drain them completely, leaving you with dead batteries the next time you want to take your boat out.

Ultimately, the decision of whether to leave your boat batteries on or off when connected to shore power depends on your personal preference and the specific needs of your boat. As long as you’re aware of the potential risks and benefits of both approaches, you can make an informed choice that will help keep your boat in good working order for years to come.

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