How to keep Trailer Winch Battery Charged

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Last Updated on June 22, 2022

Every RV/ trailer/camper has two batteries, one for the engine is known as “house battery” which powers the appliances and electronics in the RV/trailer/camper. If it ever fails or runs out of power, the electronics and appliances will cease operating.

After testing, if a multi-meter reads 12.4-12.6 and the battery is a 12V, the battery is in good condition. If it displays less than that, the battery has to be recharged.

So, how to keep trailer winch battery charged? Well, there are several methods for charging a trailer winch battery. These are the most often used methods. 

How to keep Trailer Winch Battery Charged

Methods To Keep Trailer Winch Battery Charged

  1. Plugged into 110 volts
  2. Using generator
  3. From tow vehicle
  4. Using solar panel

Plugged into 110 volts

“Plugged into 110 volts” is the most common and quickest method of charging your winch battery. To speed up the process, you’ll need an on-board charger. Last but not least, switch to a trickle charger to keep the batteries fully charged. This procedure needs the use of a surge protector.

Using generator

The generator operates in the same manner as plugged into 110 volts, because the generator will also offer 110V electricity or a 30 amp breaker in this procedure. It is a quick procedure to charge your trailer batteries, and you can also power an air conditioner or other appliance on your RV.

From tow vehicle

Charging your RV batteries with a tow truck is a time-consuming operation. A dead trailer cannot be charged from a tow vehicle. You can also only accomplish your work if the tow vehicle is properly equipped. You will need a 7-way connection from your tow vehicle to your trailer to charge the batteries.

Using solar panel

You may use the solar panel to charge your RV/trailer/camper. It is a convenient way to charge and maintain your home batteries without having to plug in your trailer or RV. Make sure you have the proper wattage before using a solar panel. The power range of a typical solar panel is 100 to 400 watts.


How long will it take to charge my trailer battery?

The time it takes to charge is primarily determined by how much it has been used. It will take a whole night if the battery is fully depleted; else, it will take only a few hours. An RV’s maximum capacity is 360 amps. If the battery is completely depleted, a 15 amp on-board charger will take around 24 hours to fully charge it. It will operate in the same way as the generator.

On the other hand, the charging process with the solar panel will be completely different. It will be determined by the state of the sun. On bright days, solar will charge 5-7 amps per 100 watts in one hour and be fully charged in 28 hours. The battery will then be fully charged in four days.

How often should I charge the batteries in my travel trailer?

You should try to maintain your RV/trailer/camper batteries as charged as possible. But do not leave it charging for days. It is different in the winter since there is a risk of death due to the cold. Even if you are not using it, keep it fully charged. It will keep your battery in excellent working order and will come in handy if you have a last-minute plan.

In the winter, how can I keep my RV battery charged?

In the winter, remove the batteries from the winch and put it in charge. Keep it in a warm place once it has been fully charged. Because it has the potential to be harmful, do not be placed on a concrete floor. Keep an eye on your battery’s water level on a frequent basis. If they are low, fill them up right away. Battery life may be extended with proper maintenance.   

While my RV is hooked in, will the battery charge?

A portable charger is pre-installed near the power plugging in almost every new RV. The battery will charge as long as you connect it using an on-board charger.

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About the Author: Brian Silvestro

Brian Silvestro is the founder and chief editor of OffroadersArena. He spends his free time tending to his BMW iX SUV and explaining its merits to anyone who'll listen.

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