I am new to this forum in fact just found this site a couple days ago and just go approved to post. Not sure how many here have EV's and do any type of Overlanding with them but I do and I intend to do just that. I own a Rivian R1T and one of the biggest challenges I am running into is finding gear to work with the Rivian. This is especially true with it's 12v system the Rivian's 12v system doesn't have the cranking amps that an ICE vehicle does so I can't just hook a wench to it that is powerful enough to do any good. My question is are there any good 12v solutions that could be added to a Rivian that could do things like power a wench or other 12v equipment. The truck does have built in inverters to output 120v AC as well as outlets that do hook into it's internal 12v system but trying to wire into the 12v system outside of the built in outlets is alot of work. So I was thinking that maybe I could add an external 12v solution just for powering things I don't want to wire into the Rivian's 12v system.. thoughts?
Welcome to the forum, Johstacy. You I think are the first Rivian owner to join! I’ve had an R1 reservation since June 2021, and should be taking delivery in the next few months.
Rivian was supposed to be working on a factory winch option but they have not made any announcements since fall 2021 during their IPO. All the aftermarket accessories to date have been, in my opinion, low quality. I hope to fab my own accessories when mine comes.
Because the Rivian has so much on board power, I think you’ll find it practical to run most AC accessories off of the factory 110v and 12v plugs. The on board inverters will exceed the load allowed by the portable power banks from Bluetti/Yeti/etc and the 135 kWh battery is hundreds of times larger than anything those offer.
For a winch I think you will need to add a separate 12V battery and a DC-DC charger to charge it off the factory 12v system. You’ll have to fab your own winch tray and cut some of the body work to mount it, but I’m highly suspecting there is room behind the front bumper for a hidden winch. If you want to keep it VERY simple you could just tie down a 12V LiFePo4 battery in the frunk and wire the winch direct. Just charge the battery at home before an overlanding trip, and as long as you only have to winch a couple times you’ll probably be fine. You’ll probably need a 12,500lb winch for that truck and the power rating for the winch will dictate how large a battery you buy.
I see you are in Washington. I’m in Seattle. If you want some help and are close, let me know.
... You will probably have better luck finding the vehicle recovery device you want if you try searching for "winch". ... 
