Battery Disconnect

by Greg Zimmerman
Published: Updated:

On 2018 and older Casitas, the battery is wired directly to the electrical system.  Because of this, the propane detector draws constant power and will kill the battery in a matter of weeks if the Casita isn’t used.  Little House Customs has a battery disconnect kit to solve the problem.  The heavy duty connector makes it easy to connect or disconnect the battery without worry of reversing the polarity or using tools.  It’s such a popular modification that Casita incorporates a disconnect on 2019+ trailers.

To get started, remove the battery, and cut the factory wires to 8″ length.  Next crimp the 8 gauge lugs in place.  I use a heavy duty ratcheting crimper because a standard crimper isn’t strong enough.  I solder the ends for a better connection.

Next the terminal block is mounted.  An angle head drill is handy for the tight working area.  After the 3/16″ holes are drilled, the split rivets are installed.

Here’s the completed terminal block with the Anderson connector and leads.  They’re attached to the block with 9/16″ brass nuts.   Be careful, on a Casita, the black wire is positive.  The terminal block is also a good location for installing trickle charger or solar panel leads as well.

While the battery is out, it’s a good idea to check the water level in the cells.  Only top it off with distilled water.  Wear gloves and safety glasses, because there’s sulfuric acid in there.

Here’s the complete installation.  Unplugging the big red connector disconnects the battery.

Tip:  It’s vital to keep the battery plugged in while trailering.  The battery is what activates the trailer brakes if the emergency brake cable is pulled.


John November 23, 2018 - 9:24 am

Would like to know if you made the battery slide and hold or bought it somewhere . If you sell them could you give price. Thanks

Greg Zimmerman December 3, 2018 - 8:56 pm


That’s not a slide, just the factory aluminum battery mount. We are looking into the possibility of fabricating a real battery slide in the future though. Thanks for asking.

Rebecca Bergio November 10, 2019 - 12:48 pm

Great modification! Question: Is disconnecting the battery sufficient when winterizing (5 months), or should you remove battery and use a trickle charger?

Greg Zimmerman November 10, 2019 - 1:53 pm

You should be fine with it disconnected for 5 months without a charger.

Meari March 20, 2024 - 10:44 am

With your instructions, I feel like I can do this! Thank you so much for your thorough tutorial.


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