Dual Motor EPA Certification Application (Reveals HP, Efficiency, Range, MPGe Figures)

[Blueassassin]

I expect the battery to be the limiting factor for straight line performance, but with individual motor torque vectoring it should mean a significant bump in responsiveness in corners and loose off-road, and I hope that's what is being planned.

I mean I would be hoping the Max pack would be available for this.

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[Dark-Fx]

I mean I would be hoping the Max pack would be available for this.

I'm assuming max pack is going to be obligated for the higher performance variant.

 

[evhelphub]

No heat pump.

Not that it was expected per se, but man I would really appreciate having one.

 

[SASSquatch]

If I'm reading the chart correctly, it would seem that the dual-motor R1S with 21" wheels, has a prospective adjusted combined EPA range rating of ~352 miles. That compares with 321 miles for the quad R1S on the same wheels, and is only about a 9.6% improvement.

While that's not trivial, it's quite a bit less than I would have expected in going from four motors down to two. Is one of the conclusions that the new Enduro motors are not particularly efficient?

Or that the Bosch motors, you know that have been designed by a company in business for over 100 years are extremely efficient.

 

[Dark-Fx]

Or that the Bosch motors, you know that have been designed by a company in business for over 100 years are extremely efficient.

I think it'll be interesting to see an apples-to-apples towing comparison between the quad and dual. Rivian could have targeted higher efficiency at higher loads+highway RPM, and that won't really show in the EPA tests.

 

[kayabusa]

If they reach 400 miles on the R1S, at $90k tons of orders coming.....

 

[alextakesphotos]

340 miles with 22s. Im cool with it.

 

[shrink]

But how much weight does the max pack add.. inquiring minds want to know.

This should be a good reference point for the Large Pack:

 

[RYU]

A few observations:

1. This seems like a relative Nothing Burger but it's nice to get confirmation from what we already knew

2. I suspect Regen will be less strong in the Dual vs. Quad. Quad Regen is incredibly usable

3. I can see an advantage to going from Quad to Dual except cost (a big deal for many) and availability of Max pack. In the Large pack variant the Quad seems like the better value for money.

 

[Dark-Fx]

2. I suspect Regen will be less strong in the Dual vs. Quad. Quad Regen is incredibly usable

It's battery limited. Should be the same.

 

[zefram47]

It's battery limited. Should be the same.

There's been strong suspicion it's actually limited to the heat built up in the inverters rather than a battery limitation given the truck can sit on 200 kW at a DCFC for 15 minutes. So if Rivian improved cooling / efficiency with their homegrown inverters, they may be able to do more sustained regen than the quad. I'm pretty tired of losing regen every time I go down a canyon road.

 

[Adventusaurus]

2. I suspect Regen will be less strong in the Dual vs. Quad. Quad Regen is incredibly usable

I think it will be the same. Regen is no worse (nor better) in 2 motor or 4 motor modes with the 4 motor R1T. It seems to be limited more by the state of charge and cumulative regen use (long descents) than motor capacity.

 

[Dark-Fx]

There's been strong suspicion it's actually limited to the heat built up in the inverters rather than a battery limitation given the truck can sit on 200 kW at a DCFC for 15 minutes. So if Rivian improved cooling / efficiency with their homegrown inverters, they may be able to do more sustained regen than the quad. I'm pretty tired of losing regen every time I go down a canyon road.

We don't have long descents around here. Does the amount of cumulative energy put back in the battery seem to change if you're in conserve mode? Actual speed reduction seems fairly close to the same on flat ground here, which wouldn't be inverter related since you're only using half of them in conserve.

 

[izgoy]

What's the maximum gross weight that the R1S dual-motor can pull? Can it pull a 7,500 lbs trailer safely?

 

[DuoRivians]

What's the maximum gross weight that the R1S dual-motor can pull? Can it pull a 7,500 lbs trailer safely?

Towing capacity hasn't changed by motor type, per Rivian's specs

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