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An update... I tested the Kewig three port charger and only the right USB-C port fast charges my Samsung Galaxy S21. The other is half that speed. I contacted support and they were not too helpful, so I returned it. I put the second cigarette lighter port in it's place and bought a fast charger to plug into it.
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3wisemonkeyz

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You mentioned this could power an amplifier, presumably for an add-on subwoofer - is that true? Any recommendations on routing the wire to the spare tire storage where the sub would be?
 
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Riptonite

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You mentioned this could power an amplifier, presumably for an add-on subwoofer - is that true? Any recommendations on routing the wire to the spare tire storage where the sub would be?
Since the positive lug ties to the main 12V battery, it should be able power pretty much anything the 12V system can handle.
I haven't installed my amp yet so I can't offer pics and confirmation, but I aim to run my power cable along the passenger side door frames, under the trim and next to the edge of the carpet.
That seems likely easier than going through the center console and back.
Note: I am also going to check the rear wiring to see if I can pull from the auxiliary air compressor circuit since that has a 40A fuse (F11 on passenger side fuse block). From initial visual check, it looks like the air compressor controller activates a relay in the left rear corner since the leads to the compressor are much larger than any to the controller.
 

3wisemonkeyz

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Since the positive lug ties to the main 12V battery, it should be able power pretty much anything the 12V system can handle.
I haven't installed my amp yet so I can't offer pics and confirmation, but I aim to run my power cable along the passenger side door frames, under the trim and next to the edge of the carpet.
That seems likely easier than going through the center console and back.
Note: I am also going to check the rear wiring to see if I can pull from the auxiliary air compressor circuit since that has a 40A fuse (F11 on passenger side fuse block). From initial visual check, it looks like the air compressor controller activates a relay in the left rear corner since the leads to the compressor are much larger than any to the controller.
please let us know if you do that and how it works out. Im just looking for the simplest way to tap into power for a sub without throwing errors/draining.
 
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Riptonite

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Initial check results:
Here is a couple pics of the power leads for the R1S Aux Air Compressor. The six-terminal connector furthest back is the one of interest. The top side is from vehicle interior and is the source/feed, bottom side goes under the vehicle. Power comes in via the rear-most pink wire (driver's side rear as the connector is installed, visible next to the empty terminal). Activating the air compressor energizes the driver's front pink wire (somewhat hidden in these pics).
I haven't yet confirmed the power routes through passenger-side F11 since the weather sucks today and I didn't want sleet in my face while peering under the dash.
This is "only" a 40A circuit, so I may try powering my 1000W amp through this to see if it holds up to moderate thumping while also carrying a spare 40A fuse and expecting to route separately-fused power back from the aforementioned fuse block tap sometime in the future.

Rivian R1T R1S DIY: How To Add Interior 12v/USB-C (and interior high-current 12v loads) 20240403_141633


Rivian R1T R1S DIY: How To Add Interior 12v/USB-C (and interior high-current 12v loads) 20240403_141630
 

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Initial check results:
Here is a couple pics of the power leads for the R1S Aux Air Compressor. The six-terminal connector furthest back is the one of interest. The top side is from vehicle interior and is the source/feed, bottom side goes under the vehicle. Power comes in via the rear-most pink wire (driver's side rear as the connector is installed, visible next to the empty terminal). Activating the air compressor energizes the driver's front pink wire (somewhat hidden in these pics).
I haven't yet confirmed the power routes through passenger-side F11 since the weather sucks today and I didn't want sleet in my face while peering under the dash.
This is "only" a 40A circuit, so I may try powering my 1000W amp through this to see if it holds up to moderate thumping while also carrying a spare 40A fuse and expecting to route separately-fused power back from the aforementioned fuse block tap sometime in the future.

20240403_141633.jpg


20240403_141630.jpg
Awesome, thank you!
 

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Also, if you don’t know the part #, you can always take a pic of it and submit a service ticket. When someone contacts you, just tell them you need to pick up the part and they’ll forward the request to your local SC.
In case someone needs a replacement part
Rivian R1T R1S DIY: How To Add Interior 12v/USB-C (and interior high-current 12v loads) part.JPG
 

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Can something like a dashcam be powered from the 12V battery 24/7? Not sure how often the system checks the voltage and recharge it
 

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I recently installed a 12v outlet and additional USB charging outlets in front of the footwell tray. There are a couple other threads about adding interior 12V but I found a way to do it that requires minimal trim removal, independently fuses whatever you add and doesn't require any wiring mods or crimping. By tapping into the supply lug for one of the main fuse blocks, you can install just about any fused load that the 12V system could handle (amplifiers, radios, chargers and etc.) without going through a bulkhead.

Do this at your own risk. Don't drill into wires. Don't short 12v to ground through your tools or body. This approach taps a primary cable to the 12V battery bus so fuse any load you connect. Be careful!

Parts used:
KEWIG 12V USB Outlet Quick Charge 3.0 USB Charger Socket & Dual PD Type - C Ports, USB Cigartte Lighter Socket with ON/Off Switch DIY Kit, Waterproof Car Charger for Car Boat Marine RV ATV,Golf https://a.co/d/bfNVhsm
Nilight 2 Pack Car Cigarette... https://www.amazon.com/dp/B082D8WKNW?ref=ppx_pop_mob_ap_share
Optional: M6x1.0 nut; adding a new nut is easier, and probably safer for vehicle electronics, than removing the OEM nut feeding 12V power to the fuse block.

Tools/supplies:
T20 driver
10mm combination wrench
10mm deep socket with at least 3" extension
30mm (~1 1/8") Drill bit
Dielectric grease
Medium threadlocker
Utility knife

Installation Steps
1. Remove trim panels.
a. Clear out the center console tray and remove the rubber liner. b. Remove the "RIVIAN" branded trim panel in front of the tray by pulling out on the lower edge. It has a pair of tabs at the top and fits under the main lower dash trim.
c. Remove the small trim panel above the accelerator pedal. One T20 screw and then pull down on the end closest to the driver seat.
d. Pull back the top of the trim next to the accelerator pedal. One T20 screw on the top edge, then many clips. Just pull it away from the center console. Aim is to access the upper of the two M6 10mm hex head bolts to use as the ground point.
e. Remove U-shaped trim above the passenger footwell. Two T20 screws, then pull down on each side of the edge closest to the seat. Don't pull on the plastic/rubber airbag cover.

2. Install the ground wire ring(s) under the upper M6 bolt adjacent to the accelerator pedal. I applied a small amount of dielectric grease to the threads and ring terminal(s) to reduce corrosion risk. Route the wire(s) toward the outlet location and tighten the bolt.

3. Install positive wire.
a. Optional safety step [UPDATED after discussion with service tech]- To remove 12V power without tripping a fault code, pull the fireman's loop to disconnect the high-voltage battery, then disconnect the negative terminal(s) from the 12V battery(ies). (To reconnect, first replace fireman's loop, then reconnect 12v negative terminal(s).)
b. Locate the 12V supply lug on the passenger fuse panel. Look up from the passenger footwell, just in front of and above the passenger footwell airbag. The supply lug has a black plastic cover that says "Press Here" and is on the driver's side rear corner of the fuse block.
c. Remove the "Press Here" cover by pressing where it says and pulling down on the cover. I reached above the plastic frame around the fuse block so I could push down on the top edge of the cover.
d. If you have a spare M6 nut, apply some dielectric grease to the positive ring terminal(s) and threadlocker to the nut threads, then install the ring terminals stacked on top of the OEM supply lug bolt. If no spare nut, remove the OEM nut, apply grease and threadlocker, add ring terminals and reinstall. Orient wires away from the fuse block.
e. Route positive wires up between the fuse block and surrounding plastic frame and over to the outlet location.
f. Reinstall "Press Here" cover over the 12V lug.

4. Install outlet(s)
a. Drill 30mm (1 1/8") hole(s) for the outlet(s). See the pictures. From the lower edge of the panel, the lower hole on mine is about 3 1/4" up and the upper hole is about 7 1/2". From the passenger-side edge, lower hole is about 1 3/4" over and the upper hole is about 2 1/4" over from the corner in the trim panel. I selected these positions to clear the plastic frame behind the trim panel, leave space for the outlets with terminals behind the panel, clear the console tray, and not crowd the RIVIAN logo.
b. Trim away the ridges on the back of the panel so the bulkhead nuts can fit flush against the panel. See pic.
c. Install the outlet(s), check orientation, and tighten the nuts. I did not use the rectangular panel that came with the 12v outlet.

5. Install modified panel and outlets. If you used the lower position, the wires must route through the rectangular opening just ahead of the outlet panel since the outlet tucks in there. Connect the wires and reinstall the panel.

6. [UPDATED] Install fireman's loop then reconnect 12V battery and test the outlet(s).

7. If all is well, reinstall all trim panels. Mind the positive wires don't get caught in the duct openings above the passenger footwell.

Note: if you pop a fuse on an outlet, you will likely have to pull the U-shaped passenger footwell trim panel to access the fuze holder(s).

I am glad to answer related questions. Be safe and good luck with your projects!

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this was an incredibly helpful thread - thank you very much. I just successfully added an Andersen PowerPole port and am powering an amateur radio.

Has anyone mounted anything (using screws) on the lower surface of the central vent? I tried to feel around in there from the back when I had everything open but couldn't really tell if there was enough clearance to mount the radio to the bottom of the vent housing without interfering with any of the vent internals - the radio head end is in the lower well for now.
 
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Riptonite

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Very glad you found this helpful!

Here is what's behind the lower dash trim. It is pretty tight with the duct work; only about the depth of the plastic tab that secures the outer trim panel before you hit ductwork. At least there is a second layer of plastic that could give a short screw good purchase.

Rivian R1T R1S DIY: How To Add Interior 12v/USB-C (and interior high-current 12v loads) 20241024_151012


Rivian R1T R1S DIY: How To Add Interior 12v/USB-C (and interior high-current 12v loads) 20241024_150955
 

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pgaffney

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great photo and info - thanks! I'll shorten some screws to the depth of the tab + 1/8" or so and that should work
 
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Riptonite

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If you don't want to drill, Electrified Overland makes this frame and we find it very versatile and sturdy.

Rivian R1T R1S DIY: How To Add Interior 12v/USB-C (and interior high-current 12v loads) 20241024_171211
 

MacO512

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I recently installed a 12v outlet and additional USB charging outlets in front of the footwell tray. There are a couple other threads about adding interior 12V but I found a way to do it that requires minimal trim removal, independently fuses whatever you add and doesn't require any wiring mods or crimping. By tapping into the supply lug for one of the main fuse blocks, you can install just about any fused load that the 12V system could handle (amplifiers, radios, chargers and etc.) without going through a bulkhead.

Do this at your own risk. Don't drill into wires. Don't short 12v to ground through your tools or body. This approach taps a primary cable to the 12V battery bus so fuse any load you connect. Be careful!

Parts used:
KEWIG 12V USB Outlet Quick Charge 3.0 USB Charger Socket & Dual PD Type - C Ports, USB Cigartte Lighter Socket with ON/Off Switch DIY Kit, Waterproof Car Charger for Car Boat Marine RV ATV,Golf https://a.co/d/bfNVhsm
Nilight 2 Pack Car Cigarette... https://www.amazon.com/dp/B082D8WKNW?ref=ppx_pop_mob_ap_share
Optional: M6x1.0 nut; adding a new nut is easier, and probably safer for vehicle electronics, than removing the OEM nut feeding 12V power to the fuse block.

Tools/supplies:
T20 driver
10mm combination wrench
10mm deep socket with at least 3" extension
30mm (~1 1/8") Drill bit
Dielectric grease
Medium threadlocker
Utility knife

Installation Steps
1. Remove trim panels.
a. Clear out the center console tray and remove the rubber liner. b. Remove the "RIVIAN" branded trim panel in front of the tray by pulling out on the lower edge. It has a pair of tabs at the top and fits under the main lower dash trim.
c. Remove the small trim panel above the accelerator pedal. One T20 screw and then pull down on the end closest to the driver seat.
d. Pull back the top of the trim next to the accelerator pedal. One T20 screw on the top edge, then many clips. Just pull it away from the center console. Aim is to access the upper of the two M6 10mm hex head bolts to use as the ground point.
e. Remove U-shaped trim above the passenger footwell. Two T20 screws, then pull down on each side of the edge closest to the seat. Don't pull on the plastic/rubber airbag cover.

2. Install the ground wire ring(s) under the upper M6 bolt adjacent to the accelerator pedal. I applied a small amount of dielectric grease to the threads and ring terminal(s) to reduce corrosion risk. Route the wire(s) toward the outlet location and tighten the bolt.

3. Install positive wire.
a. Optional safety step [UPDATED after discussion with service tech]- To remove 12V power without tripping a fault code, pull the fireman's loop to disconnect the high-voltage battery, then disconnect the negative terminal(s) from the 12V battery(ies). (To reconnect, first replace fireman's loop, then reconnect 12v negative terminal(s).)
b. Locate the 12V supply lug on the passenger fuse panel. Look up from the passenger footwell, just in front of and above the passenger footwell airbag. The supply lug has a black plastic cover that says "Press Here" and is on the driver's side rear corner of the fuse block.
c. Remove the "Press Here" cover by pressing where it says and pulling down on the cover. I reached above the plastic frame around the fuse block so I could push down on the top edge of the cover.
d. If you have a spare M6 nut, apply some dielectric grease to the positive ring terminal(s) and threadlocker to the nut threads, then install the ring terminals stacked on top of the OEM supply lug bolt. If no spare nut, remove the OEM nut, apply grease and threadlocker, add ring terminals and reinstall. Orient wires away from the fuse block.
e. Route positive wires up between the fuse block and surrounding plastic frame and over to the outlet location.
f. Reinstall "Press Here" cover over the 12V lug.

4. Install outlet(s)
a. Drill 30mm (1 1/8") hole(s) for the outlet(s). See the pictures. From the lower edge of the panel, the lower hole on mine is about 3 1/4" up and the upper hole is about 7 1/2". From the passenger-side edge, lower hole is about 1 3/4" over and the upper hole is about 2 1/4" over from the corner in the trim panel. I selected these positions to clear the plastic frame behind the trim panel, leave space for the outlets with terminals behind the panel, clear the console tray, and not crowd the RIVIAN logo.
b. Trim away the ridges on the back of the panel so the bulkhead nuts can fit flush against the panel. See pic.
c. Install the outlet(s), check orientation, and tighten the nuts. I did not use the rectangular panel that came with the 12v outlet.

5. Install modified panel and outlets. If you used the lower position, the wires must route through the rectangular opening just ahead of the outlet panel since the outlet tucks in there. Connect the wires and reinstall the panel.

6. [UPDATED] Install fireman's loop then reconnect 12V battery and test the outlet(s).

7. If all is well, reinstall all trim panels. Mind the positive wires don't get caught in the duct openings above the passenger footwell.

Note: if you pop a fuse on an outlet, you will likely have to pull the U-shaped passenger footwell trim panel to access the fuze holder(s).

I am glad to answer related questions. Be safe and good luck with your projects!

20240318_154138.jpg


20240318_153125.jpg


20240318_150852.jpg


20240318_150208.jpg


20240318_150239.jpg


20240318_151008.jpg


20240320_124440.jpg


20240320_124323.jpg


20240320_124421.jpg


20240320_124344.jpg


20240320_124400.jpg


20240318_153842.jpg


20240318_153924.jpg
Great post! I've been researching how to potentially swap in a spare 12v if that is needed and I believe this point you make is a good practice and makes sense;

3. Install positive wire.​
a. Optional safety step [UPDATED after discussion with service tech]- To remove 12V power without tripping a fault code, pull the fireman's loop to disconnect the high-voltage battery, then disconnect the negative terminal(s) from the 12V battery(ies). (To reconnect, first replace fireman's loop, then reconnect 12v negative terminal(s).)​
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