This is the perfect battery isolator for your RV. I set this up so I can disconnect the battery from my RV when not in use. In modern vans there is always some load when the battery is connected. A CO monitor, a different entertainment system. If you leave the battery connected and the RV sits down, sooner or later you will drain the battery. Repeat this multiple times and you will prematurely replace the battery. I have set this to disconnect everything in the camper from the battery except for the trailer brakes. In any case, the trailer brake switch must be live. It doesn't draw power from the battery unless the stylus is unplugged, so under normal circumstances this won't affect battery life. They are well made and easy to use. Installation isn't difficult, but you do need to have an idea of what you're doing. There are no instructions as such as this is a universal part. If you know what you're doing or have someone install it, this is a great option.
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