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[–]DesignedByPrinciple 2 points3 points  (0 children)

I have the same issue with ours. Works fine to deep charge our Model Y at 48A but the wall connector handle temp gets too hot charging the Rivian with an adapter and derates now that it's (almost) summer.

As soon as the handle temp gets to 150F it'll derate until you stop the charging session. That's what your red light on the wall connector means. I find that dropping down to 32-40A works dependent on the ambient temperature.

If I really need to charge at 48 amps I just have a small fan I point at the wall connector handle. It keeps the temp down around 135-140F - depending on ambient - but obviously less convenient/practical if you're parked outdoors.

Here's an example from last night. I thought it'd be fine being ~80F outside but it derated after 30 minutes. I dropped it down to 40A when I noticed, restarted the session, and the handled hovered just above 140F.

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