Efficiency Questions M/KWH

[epaley]

I purchased a Gen 2 R1S Large Pack in Sept. I'm trying to figure out the battery and efficiency metrics. The car is rated as 330 miles on 100% charge.

Does anyone know the KW size of the large pack battery?

What is the EPA target M/KWH that gets me to 330 on 100% charge?

So far I’m running 2.35M/KWH for the first 2000 miles. Is that expected/low/high?

Thank you in advance for the information!

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[SANZC02]

I purchased a Gen 2 R1S Large Pack in Sept. I'm trying to figure out the battery and efficiency metrics. The car is rated as 330 miles on 100% charge.

Does anyone know the KW size of the large pack battery?

What is the EPA target M/KWH that gets me to 330 on 100% charge?

So far I’m running 2.35M/KWH for the first 2000 miles. Is that expected/low/high?

Thank you in advance for the information!

The large pack is 130 kWh, to get 330 miles you would need to get around 2.5 m/kWh.

2.35 seems decent, in SoCal I get around 2 on my G1 quad around town, on longer trips I’m usually around 2.25.

 

[Hereforthesnacks]

2.35 for mixed driving is pretty solid.

 

[DayTripping]

I thought the Gen2 large packs were smaller than the Gen1. Rivian was relying on vastly increased efficiency to offset them shrking the pack sizes on the Standard and Large Packs.

Here are the sized from another post on this forum.

Gen 2

• STANDARD 92.5-kWh pack with a maximum charging speed of 200 kW;
• LARGE 109.4-kWh pack with a maximum charging speed of 220 kW;
• MAX 141.5-kWh pack with a maximum charging speed of 220 kW.

Gen 1

• Standard: 106 kWh
• Standard+: 121 kWh
• Large: 131 kWh
• Max: 141 kWh

 

[epaley]

Ok. Good to know that I'm not the only one who is confused. At 109KW battery, I’d need 3m/kwh to get to 330. So 2.35 is very far from target. Is that right? Why is Rivian hiding this?

 

[DayTripping]

The way the nerfed the size of the large pack, to upsell you to the max pack is a bunch of you know what. I don't see them getting the 3mi/kWh to make the range numbers. But at least now the max is substantially bigger than the large. Before it was only about 10%. Couple that with the relatively slow charging rate and I can think of a lot of other EVs I'd prefer to take on a trip regardless of the range.

When MotorTrend tested the 2025 quad motor, the fast charging was pretty slow even with the max pack. To go from 5-80% they said something like 55 minutes. None of the Rivian packs maintain a high charging rate for long. Watch the recent out of spec review on YT of the charging performance on a Gen2 Rivian. Kyle obviously wasn't happy and I can see why.

 

[MidnightM00N]

Reference chart I made for efficiency of Gen 1 and 2. All Gen 2 EPA range numbers are very optimistic, the large pack most egregiously so:

 

[SPITmadFIRE]

Ok. Good to know that I'm not the only one who is confused. At 109KW battery, I’d need 3m/kwh to get to 330. So 2.35 is very far from target. Is that right? Why is Rivian hiding this?

What exactly do you think they're hiding? All of the numbers are right there in front of you...

 

[tjrivian]

What exactly do you think they're hiding? All of the numbers are right there in front of you...

They're hiding the fact that actually getting 3mi/kwh is impossible, so therefore the 330mile range is also impossible.

 

[LL75]

They're hiding the fact that actually getting 3mi/kwh is impossible, so therefore the 330mile range is also impossible.

It is all in driving style. If you are going arounrd 50 to 60 mph in ideal condition, you can get very close to it.

 

[Magicbus]

What exactly do you think they're hiding? All of the numbers are right there in front of you...

Yes, how it's driven. My performance dual motor large pack R1T.

 

[Gratedwasabi]

It is all in driving style. If you are going arounrd 50 to 60 mph in ideal condition, you can get very close to it.

That's a drastic oversimplification.

The first factor is weather. Rivians are extremely weak to cold weather and you will see 35%+ battery loss at freezing.

2nd is speed. 50ish is ideal. True highway speeds (75-80) will result in another 25%+ loss.

3rd is wind. Rivians are extremely susceptible to wind and I've noticed significant range loss in windy weather.

4th is elevation. The Rivian is going to be extra inefficient going up in elevation, ie mountains.

So people reply on here "it's the way you drive!" when someone in Florida is always going to vastly outrange someone in cooler weather.

2.35 in cooler weather is normal. I often get sub 2.

 

[mpshizzle]

It is all in driving style. If you are going arounrd 50 to 60 mph in ideal condition, you can get very close to it.

Yes, how it's driven. My performance dual motor large pack R1T.

There are so many factors.

For example, in Utah the speed limit on the interstate is 70 for most of the urban area (80 in rural areas) so traffic flows closer to 80 (90 in rural areas).

With my R1S I've seen close to 3mi/kWh driving in traffic around 60mph on a warm day on a flat route (which is very hard to find in Utah).

Going 80 with normal traffic flow on a warm day following the natural elevation changes of the interstate I'll get 2.5 +/-

Last night driving 80 in 35° weather I got 1.8-1.9

 

[LL75]

That's a drastic oversimplification.

The first factor is weather. Rivians are extremely weak to cold weather and you will see 35%+ battery loss at freezing.

2nd is speed. 50ish is ideal. True highway speeds (75-80) will result in another 25%+ loss.

3rd is wind. Rivians are extremely susceptible to wind and I've noticed significant range loss in windy weather.

4th is elevation. The Rivian is going to be extra inefficient going up in elevation, ie mountains.

So people reply on here "it's the way you drive!" when someone in Florida is always going to vastly outrange someone in cooler weather.

2.35 in cooler weather is normal. I often get sub 2.

I buy rivians not for the advertising efficiency. It is nice to get the range sometimes which I can attest that they are much better than tesla. Noone drive 55 to 60 on the highway or else you will get shot in Texas.

Speed/weather/wind are all factors and I'm 100% sure when these car companies doing their EPA testing, it is in absolute ideal environment

My life time on my quad r1s is 2.32 and my dual r1t is 2.4 and I'm happy with it.

 

[Ladiver]

I drive my Gen 1, Launch Edition with 20's, every day and plug it in at home almost every night. It gets me where I need to be.

I changed my tires from AT to AS and the drive is much quieter and probably more smooth.

The range works for me. I can get to 99% of the places I go without worrying about it. If I am on a long road trip and have a few extra hours then I drive the rivian. My last 1000 mile trip had time constraints so I took my diesel truck.

Why didn't I post what my reported range is? Well, for one, it is most likely not accurate and two, I don't track it.

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