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Can You Leave An Onboard Battery Charger On All The Time?

May 09, 2022

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Many onboard battery chargers have maintenance and trickle features that enable you to leave them plugged in constantly, even when you're not using the vehicle. 

Batteries

There are some important considerations to consider when using an onboard battery charger. First, always make sure that it is set on a timer. Leaving it on continuously can lead to damage to the battery and charger. It is better to leave it on a timer that can last from one to twenty four hours. Lastly, always use a cable that is not in direct contact with the battery.

18Onboard battery chargers

Onboard battery chargers are installed on boats to provide a constant supply of power to marine batteries. This is essential for the smooth starting of the boat's engine and for the continuous supply of accessories during a voyage. They are also necessary for the maintenance of the electric grid and the starting of boat accessories.

Some chargers can be left on constantly and will not require a reboot, such as Summit Charger. But you should always check the charging progress every now and then. It is advisable to follow the manufacturer's instructions.

Overcharging

You should avoid overcharging an onboard battery charger. It can cause damage to the battery. In some cases, overcharging can lead to a battery cell running out of free lithium. This can lead to a thermal runaway, which could be devastating. To avoid overcharging, you should always check the battery voltage to determine when it is safe to stop the charge.

Indicator lights

If you are driving and have noticed the indicator lights on the onboard battery charger not working, the charger may be experiencing a problem. This could be a blown fuse, a damaged transformer, or a dead battery. To find out what is wrong with your charger, consult its owner's manual.

The battery charger will have indicator lights for charging, discharging, and maintenance. A solid RED LED means your battery is charging, while a flashing RED light means the charger is having trouble. GREEN LEDs indicate that the battery is 50% or 75% charged. The RED LED will pulse if you have to apply a maintenance charge. An orange error LED indicates reverse polarity, and you should reverse the connections.

Mounting options

When installing an onboard battery charger, you need to choose a mounting location that will accommodate the device. Mounting options for a standard charger include through-bolting or screws. It is best to use marine-grade stainless steel for mounting hardware. The battery charger is most effective when installed close to the battery, where it can reduce the voltage drop.

A battery charger should be mounted in an area where it can receive adequate ventilation. Avoid placing it too close to the engine compartment, which is usually a warm and humid environment, and mount it higher in the boat than close to the bilge.

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