Gen 2 Max Pack Fast Charging Speed with 2025.18.01 Update

[SeaGeo]

I've seen two videos now which have shown better results than those posted by riviantracker.




Can't wait to see more real world numbers.

I tried to test myself but ran into charging station issues before giving up. I'll try again at some point for fun.

Search in Reddit the topic I shared above for an actual charging curve comparison.

Sponsored

 

[SeaGeo]

It's not insignificant. It's significantly better above 50%, and holds peak amperage longer.

The peak rate isn't meaningfully different.

 

[SeaGeo]

More context on the reddit post I suggested searching for, but here is the curve from that post.

Ignore the two dips the charging station was split down to 175kw twice briefly.

 

[mkhuffman]

More context on the reddit post I suggested searching for, but here is the curve from that post.

Ignore the two dips the charging station was split down to 175kw twice briefly.

Wow! That is a lot better than before. After seeing this graph, I wonder why people think the improvement isn't significant.

140kW at 70% and 100kW at 80%? That's awesome, actually. And look how long it keeps the charging speed above 200kW.

This is a really, really good charging curve now. I see why Kyle is so happy about it.

 

[Budman]

Wow! That is a lot better than before. After seeing this graph, I wonder why people think the improvement isn't significant.

140kW at 70% and 100kW at 80%? That's awesome, actually. And look how long it keeps the charging speed above 200kW.

This is a really, really good charging curve now. I see why Kyle is so happy about it.

The charging curve doesn't tell the charging story completely. It's the time to add X amount of energy that is important. A change to the charging curve that looks "big" doesn't necessarily translate into a big reducing in charging time. I'm only seeing a minute or two of improvement over a 20 to 30 minute charging session. And that is during sessions that have charging curves that hold power over 200 kw for a long time like this one of mine.

 

[NC-Rivian]

It is both. It allows a higher max charge rate and also changes the curve to allow higher speeds for longer throughout the charge.

Max Pack (Gen 1 & Gen 2)

• Peak charging speed increased slightly from 206 kW to 215 kW.
• 10–80% charge time is down from 41.5 minutes to 38 minutes.
• In just 15 minutes on a fast charger, you’ll now gain 135 miles, up from 129.

Large Pack (Gen 2 only)

• This one got the biggest bump, peak charging speed jumped from 162 kW to 215 kW.
• The 10–80% session dropped from 41.5 minutes to just 35.5 minutes.
• And your 15-minute top-up? Now 137 miles, up from 109.

Standard Pack (Gen 2 only)

• While the 215 kW peak stayed the same, Rivian still squeezed out more efficiency.
• Charging from 10–80% is down to 27 minutes from 30.
• You’ll now see 132 miles added in 15 minutes, up slightly from 129.

Source: https://riviantrackr.com/news/rivians-latest-software-update-boosts-fast-charging-speeds/

Anecdotally, My Gen 1 Large charge appears to mirror the Gen 2 Large increase. Starts at 215kW until mid 40’s and the slowly ramps down (as cooling fans kick on) and will hold at least 140-150 through 70%. That was on a Tesla SC this morning and is seat-of-the pants quicker than pre 18.01.

 

[NC-Rivian]

Wow! That is a lot better than before. After seeing this graph, I wonder why people think the improvement isn't significant.

140kW at 70% and 100kW at 80%? That's awesome, actually. And look how long it keeps the charging speed above 200kW.

This is a really, really good charging curve now. I see why Kyle is so happy about it.

As reported in an earlier post, my Gen 1 Large charge profile is very close to this graph even though the documentation refers to Gen 2 only.

 

[Mellowyellow]

So before this, Gen2 large packs peak was 162kw????

 

[SeaGeo]

The charging curve doesn't tell the charging story completely. It's the time to add X amount of energy that is important. A change to the charging curve that looks "big" doesn't necessarily translate into a big reducing in charging time. I'm only seeing a minute or two of improvement over a 20 to 30 minute charging session. And that is during sessions that have charging curves that hold power over 200 kw for a long time like this one of mine.

It really depends on how deep you are charging. A typical charge session like you have above? A minute or two.

If you need to charge to 80% or above, the time saved can be significant. At some portions of the curve the power is a good 50% higher.

 

[SeaGeo]

Anecdotally, My Gen 1 Large charge appears to mirror the Gen 2 Large increase. Starts at 215kW until mid 40’s and the slowly ramps down (as cooling fans kick on) and will hold at least 140-150 through 70%. That was on a Tesla SC this morning and is seat-of-the pants quicker than pre 18.01.

Can you grab the data next time? When I checked my Gen1 large pack, I saw no difference above 50%>

 

[TomServo2112]

So before this, Gen2 large packs peak was 162kw????

I don't think that's accurate. I have a Gen 2 Large+ and I've always been able to get about 210 max. After the update I saw above 215kw for the first time. Granted being a Large+ it may not be *exactly* the same as a true Large, but every other charging limitation seems to have mirroed a true Large, so I'm not sure why this one wouldn't.

 

[iamnid]

I don't think that's accurate. I have a Gen 2 Large+ and I've always been able to get about 210 max. After the update I saw above 215kw for the first time. Granted being a Large+ it may not be *exactly* the same as a true Large, but every other charging limitation seems to have mirroed a true Large, so I'm not sure why this one wouldn't.

If I'm not mistaken, the large+ is a software locked maxpack... With the same cells and cell chemistry as the maxpack. I would have expected its charging to mirror that of the maxpack as far as peak charging rate

 

[TomServo2112]

If I'm not mistaken, the large+ is a software locked maxpack... With the same cells and cell chemistry as the maxpack. I would have expected its charging to mirror that of the maxpack as far as peak charging rate

Yes it is a software locked max pack. But Rivian has locked every single thing to match the true Large. We don't get the Max's curve, the trip computer does the math based on it being 108kwh instead of 120.5; everything that should be different is exactly like the Large.. Service won't even officially admit that it's a software locked Max to me, either. So to make our experience exactly like the Large except for max speed seems odd to me. The first I've heard of a true Large being limited to 162kw is right here in this thread, quoting the RivianTrackr note. In fairness, I don't see a whole lot of people posting that they have true Large packs. I see more people discussing their Large+ than a true Large, so I may just have a blind spot there. Max speed of 162kw is terrible. My wife's Q8 has a higher peak than that.

 

[Mellowyellow]

Yes it is a software locked max pack. But Rivian has locked every single thing to match the true Large. We don't get the Max's curve, the trip computer does the math based on it being 108kwh instead of 120.5; everything that should be different is exactly like the Large.. Service won't even officially admit that it's a software locked Max to me, either. So to make our experience exactly like the Large except for max speed seems odd to me. The first I've heard of a true Large being limited to 162kw is right here in this thread.

I agree. If that were true, I would've expected a million pitchforks to come out.

 

[SeaGeo]

Yes it is a software locked max pack. But Rivian has locked every single thing to match the true Large. We don't get the Max's curve, the trip computer does the math based on it being 108kwh instead of 120.5; everything that should be different is exactly like the Large.. Service won't even officially admit that it's a software locked Max to me, either. So to make our experience exactly like the Large except for max speed seems odd to me. The first I've heard of a true Large being limited to 162kw is right here in this thread, quoting the RivianTrackr note. In fairness, I don't see a whole lot of people posting that they have true Large packs. I see more people discussing their Large+ than a true Large, so I may just have a blind spot there. Max speed of 162kw is terrible. My wife's Q8 has a higher peak than that.

I agree. If that were true, I would've expected a million pitchforks to come out.

I have yet to see or hear of an actual Gen2 large pack owner say they were able to get more than ~160kw. I have run into several owners complain about it. I just don't think many people have been buying that pack.

Large+ had software capacity reduction, but I haven't seen any date to suggest that they actually fudged the curve down to match what the actual large pack was doing.

A large pack only getting ~160kw matches them stressing the cells the same that they were stressing them in the max pack when you adjust for pack size. They probably just didn't put the resources into pushing the cells harder until this update since the pack is so new.

Sponsored