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Its been working great and since my last post I added a 115W flexible solar panel to the hood to help supplement the extra battery so I'm not drawing as much from the Rivian 12V system. As for the 13.5 sub, thats what I had in my Tacoma and what I was trying to fit in the Rivian, but for the...

I know it may not be everyone's cup of tea, but Lensun makes a 115W, hood-mounted solar panel for the Rivian. I have this primarily charging a separate 12V battery (for accessories), but it also acts as a trickle charger to the Rivian's 12V system when the secondary 12V system is at capacity...

Yes, the DC-DC converter (pictured upper left) charges the lithium battery using the Rivian's existing 12V lead battery as the power source.

I got the 100Ah solid state lithium battery and DC-DC charger installed and working great so far. I got a deal from Renogy and they gave me a shunt and battery monitor which is pretty convenient as to see the state of the battery without the app. I'll report back if I run into any issues down...

It's funny you say that, because that's exactly the route I ended up going. I haven't been able to test it yet though, because the battery I got from Renogy ended up being defective, so I had to send it back. Here are the components I went with though. REGO - 12V 104Ah Super Slim Solid State...

Once installed, I'd recommend hooking a multimeter directly to the 12V battery and play a very bass-heavy song at high volume. If you see any considerable voltage drops, it might be worth investigating a second battery. My personal option, I think you'll be totally fine with a 250W amp, though.

What amp are you going with? I'm looking at adding a second battery to power my JL HD1200.1 because the existing 20Ah battery doesn't have nearly enough spare capacity. I immediately triggered the 12V service warning the first time I turned it up! ? See my other post and proposed solution...

Did anyone catch this part of the article? "Rivian's newer R1 seems to have solved the issue with a trickle-charging approach that no longer energizes the entire car just to charge the 12-volt battery." I'd love to know more about this but I can't find any literature online about this new...

Did anyone ever crack this nut? I'm looking to add a second 12V AGM battery on a 2025 R1T to run a 1200W amplifier and I was wondering if anyone was able to figure out the output specs on the 400VDC-12VDC converter. The 2025 R1T has a single 12V 20Ah battery under the passenger seat and it's...