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how to connect two rv batteries together

How to Connect Two RV Batteries Together

When it comes to powering your RV, having reliable and efficient battery usage is crucial. Connecting two RV batteries together can provide you with more power and extended battery life. In this article, we will guide you through the process of connecting two RV batteries together for optimal performance.

1. Determine the Battery Configuration

Before connecting two RV batteries together, you need to decide on the battery configuration you want to use. There are two common configurations: parallel and series. In a parallel configuration, the positive terminals of both batteries are connected together, and the same is done with the negative terminals. This setup allows the batteries to work together and doubles your overall capacity. In a series configuration, the positive terminal of one battery is connected to the negative terminal of the other, allowing the batteries to supply increased voltage.

2. Gather the Required Tools and Materials

To connect two RV batteries together, you will need a few tools and materials. These include wire cutters, crimping tool, battery cables, ring terminals, and a battery isolator or a battery combiner. Make sure to have the correct battery cables that can handle the amperage required by your RV.

3. Disconnect the Batteries

Before starting the connection process, it is essential to disconnect all power sources and accessories from your RV. This includes turning off all power systems, unplugging any shore power, and detaching any solar connections. It is also crucial to disconnect the negative terminal of both batteries to ensure no accidental current flow during the process.

4. Connect the Batteries in the Chosen Configuration

If you have decided on a parallel configuration, connect the positive terminal of one battery to the positive terminal of the other using a battery cable and a ring terminal. Repeat the same process for the negative terminals. Ensure that the connections are secure and tightened properly. If you have chosen a series configuration, connect the positive terminal of one battery to the negative terminal of the other using a battery cable and a ring terminal. Leave the remaining positive and negative terminals as open connections.

5. Install the Battery Isolator or Battery Combiner

To prevent any damage to your batteries and ensure efficient power distribution, it is recommended to install a battery isolator or a battery combiner. This device allows current to flow from the alternator or the converter to charge both batteries simultaneously while preventing backflow or draining one battery more than the other. Follow the manufacturer’s instructions to correctly install the battery isolator or battery combiner.

In Summary

Connecting two RV batteries together is a great way to enhance your power supply and extend battery life. Determine the battery configuration you want to use (parallel or series) and gather the necessary tools and materials. Disconnect all power sources and accessories from your RV, and then connect the batteries according to your chosen configuration. Finally, install a battery isolator or battery combiner for efficient power distribution. With these steps, you can successfully connect two RV batteries and enjoy extended power for your travels.

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