Help installing a 7way pin and break controller
Hello, so I recently got a trailer with electric breakers and a 7pin connector. Now I used to have a 4 pin already installed on the van. So I purchased a 7way adapter which came with I’ll say the most a 12awg wire. I ran the break controller installation at the front of the van and ran 2 8awg wires one for the break and another for 12v. Unfortunately there is not very much room at the front of the Promaster to add a smart battery isolator, so I was thinking of adding one to the back of the van near by the 7pin connector. I wanted to use the isolator to make sure the trailer won’t withdraw power when the van is not running. I have a 280ah livepo4 battery and the trailer have one solar panel that recharges it slowly. I don’t plan to run much from the van but I’m not sure how this works and how much power the trailer will withdraw from the van and if the cables will be enough. I’ll have a 30amp fuse at the 12v line coming from the battery.
Please guide me on what I could be doing wrong
Thank you