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The regen has a limit…not sure if it’s a heat related…I’ve had the regen disengage on a steep mountain downhill near my home multiple times. The energy arc displays hatched zone, and the display announces the regen is disengaged. This is without a trailer, so you might expect this earlier/often towing any significant weight downhill
 

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Interesting replies; thank you.
It would be interesting to know:
1. The effect on regenerative braking for SOC between 95 and 100%
2. How finely (and dynamically) regen braking can be adjusted.
3. Is regen braking really meant to be an equivalent to downshifting an ICE transmission.
(It doesn't sound like it is designed as an equivalent if it disconnects under certain conditions).

Does anyone know how to ask Rivian these questions?

Thanks
1) it reduces regen near the battery limit. The truck will tell you it’s not avail…charge to 100% and you’ll see.
2) idk. The truck gives you two options…you’ll want high to get max range…you just have to get accustom to the deceleration
3)no…it isn’t…it’s to extend your range.
 
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