Realize this is a common discussion but most threads I have found are old (pre delivery) and generic, probably speculation about EVs in general & don't seem to have any particular knowledge specific to the Rivian cells, BMS or ESS overall.
Rivian's onboard software suggests a daily charge limit of 70% and suggests charging to 85% and 100% will decrease battery wear. Other than 70% being even lower than maybe I would have expected, seems fine so far. But I cannot find anything from Rivian saying that fast DC charging reduces battery life or to avoid it (not that I doubt it does, but I'm wondering how much). Or to put it a better way, when confronting a road trip, which is better: charge vehicle at home to 85% or 100% before a trip and either forego the fast charge on the way (or fast charge for a shorter duration)?
Many DC fast chargers are ~50kW, which is still a 2-3 hour charge and doesn't strike me as a charge rate that would be fast enough to really damage the battery. To me it's completely unobvious whether for argument sake charging to 100% before a trip would be worse or better than leaving the home at 70% SOC and then charging from say 30-70% via fast charging at 50kW or even 150kW.
Just wondering if anyone has any heuristics to guide decision making when planning road trips.
On a related note, I'm frustrated by the lack of charging configurability. I would love to be be able to tell the car / charger to do something like "charge to 85% by 3pm" vs trying to do the math to figure out how soon I need to start charging to get to a desired level before a trip (to avoid letting the truck sit at high SOC for longer than necessary).
The pinned post on this forum and this thread has some discussion but not really any practical advice for making charing tradeoffs for trips.
www.rivianownersforum.com
Rivian's onboard software suggests a daily charge limit of 70% and suggests charging to 85% and 100% will decrease battery wear. Other than 70% being even lower than maybe I would have expected, seems fine so far. But I cannot find anything from Rivian saying that fast DC charging reduces battery life or to avoid it (not that I doubt it does, but I'm wondering how much). Or to put it a better way, when confronting a road trip, which is better: charge vehicle at home to 85% or 100% before a trip and either forego the fast charge on the way (or fast charge for a shorter duration)?
Many DC fast chargers are ~50kW, which is still a 2-3 hour charge and doesn't strike me as a charge rate that would be fast enough to really damage the battery. To me it's completely unobvious whether for argument sake charging to 100% before a trip would be worse or better than leaving the home at 70% SOC and then charging from say 30-70% via fast charging at 50kW or even 150kW.
Just wondering if anyone has any heuristics to guide decision making when planning road trips.
On a related note, I'm frustrated by the lack of charging configurability. I would love to be be able to tell the car / charger to do something like "charge to 85% by 3pm" vs trying to do the math to figure out how soon I need to start charging to get to a desired level before a trip (to avoid letting the truck sit at high SOC for longer than necessary).
The pinned post on this forum and this thread has some discussion but not really any practical advice for making charing tradeoffs for trips.
Charging for battery longevity
I know there are several Tesla / EV owners in the forum, so I'm wondering what are your practices for charging your EV's to keep the best health of the batteries? I think Tesla has changed their stance on this over the past few years, but that's just rumor and hearsay, as I don't own one. Do...
www.rivianownersforum.com
