RIVIAN R1S charging vs Tesla

[MF Spaceship]

My question is simple and I have read much about the poor charging performance of the R1S Tri Max Pack…. However my question is I have owe ex two teslas… a 2013 model S and a 2017 Model X… both had different battery sizes but when using the NEMA 14-50 plug portable charger I always got about 20 miles of range per hour…. It seems like it is less about the battery pack and more about the charger? The R1S with the Rivian NEMA 14-50 charger gets only 10-12 out of the same outlet? It feels a bit like the Rivian charger wire is thinner and gets hotter then the Tesla… does anyone know if the Tesla portable charger works better for the Rivian then the Rivian charger? Both on the same 14-50 outlet?

it’s not a big deal, and I love the switch to Rivian, it just seems like something that should be better with exactly the same electrical set ups.

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[mpshizzle]

They all charge at the same speed, power wise. The on board charger is capable of 48 amps for all of the vehicles you just mentioned. So they will all max out your 14-50s power capability.

The reason you're likely seeing a difference in rated range per hour charged is because the R1 is a giant, heavy un-aero dynamic brick, so it gets fewer miles per kWh of energy (less efficient)

That all said, personally I always take mi/hr charging rate as a throw away stat. It's comparing apples to oranges when comparing between vehicles. Kw and kWh is a much better way to compare charging speed

 

[UnsungZero_OldTimeAdMan]

mi/h is interpreted. Not actual amount of energy going into the pack. It shouldn’t be taken as anything more than a loose frame of reference for a particular car on different days. Shouldn’t be used to compare two different vehicles (because they have different software and different ways of arriving at their interpretation).

 

[VandalSibs]

To elaborate on mpshizzle & UnsungZero's thoughts, here's the reason why "miles per hour charged" is a terrible way to look at things....

Miles of range on a battery isn't a measure of the capacity of a battery. When you filled up with gas on an ICE car, you measured in gallons, right?

For an EV, the capacity is kilowatt hours (kWh).

The easy way to figure out how quickly your EV will charge is to look at the kW rating of your outlet (using the Rivian portable charger like you are can get you up to 7.6kW). That number, times how long you are charging, will get you how much you have 'filled' the battery. This is a simplification, but it's a better way to compare between different EVs.

Your TriMax R1S has a battery size of 140 kWh. At most, your Model S had 80 kWh and your Model X 100 kWh. Since the packs are smaller, they will charge up/"fill" faster.

So, this was all just a long-ass way to say, don't compare with "Miles per hour charged", but with the actual capacity and charging rates for each vehicle.

I'd be happy to help answer any questions you might have (and refer you to someone smarter than me, if need be).

 

[Captain JB]

Thank you VandalSibs for breaking it down so nicely. JB

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