Great conversation! I would like to hijack with a little twist to this topic. I have a 2017 Raptor, ARB Elements Fridge, and Jackery 1500 Power Station. I would like to run a 12V input to the bed of the truck that will turn off when the truck is not running. I will plug my Jackery 1500 into the 12V input and my fridge into the Jackery. This will enable the Jackery to recharge while the truck is running and when cut off, the Jackery will automatically take over and put no drain on my truck battery. Therefore instead of running directly from the truck battery, I think I need to run through the uplifter switch (ARB pulls about 6 amps). Any suggestions?
If you go forward with this, start a new thread
Research this forum and the Expedition Portal forum. Using a battery isolator will be your best bet. I’ve got a write up on the Expedition Portal forum (same user name) of the isolator install on my 2018 Raptor.
I personally use a Hellroaring Isolator to charge my second battery in the bed, which runs my ARB Elements. The Hellroaring is solid state, made in Montana. Really good support too. I’ve got these on both of my pickups.
Whatever you do, make sure that you use heavy enough gauge wire and solid crimps. I ran 8 gauge to the bed.
DO NOT USE THE WIRE SPLICE UNITS. They will cause reliability issues down the road.
Best.