What drive mode is used for the EPA max range spec?

[Tony R1S]

What is the drive mode used for the EPA max range numbers (eg, R1S Quad motor of 321miles, and R1T is 328 miles)? Is it conserve mode?

Thx,
Tony.

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[shrink]

Combination of Sport and Conserve:

https://dis.epa.gov/otaqpub/display_file.jsp?docid=53765&flag=1

 

[Marchin_MTB]

Did not realize that. Somewhere I heard that it has to be tested in whatever mode the vehicle comes up in by default, so standard. But maybe that was wrong.

 

[shrink]

Did not realize that. Somewhere I heard that it has to be tested in whatever mode the vehicle comes up in by default, so standard. But maybe that was wrong.

I thought that, too, and was surprised when I found the EPA document. Doing a bit more research, I think the default stipulation is from CARB (California Air Resources Board) and starts for Model Year 2026.

https://ww2.arb.ca.gov/sites/default/files/barcu/regact/2022/accii/2acciifro_zev_tp_2026+.pdf

Not sure if the Federal EPA will be adopting the CARB testing standards.

 

[Tony R1S]

Interesting, so is the default/normal mode for Rivian the "All Purpose" mode? The R1S range estimates I'm getting is for All-purpose (~305 miles) is 10% less than conserve (~338 miles), thus my question about the EPA estimate of 321. Does the EPA doc mention % of time in conserve vs sport? I coudln't find that detail.

 

[Dark-Fx]

Interesting, so is the default/normal mode for Rivian the "All Purpose" mode? The R1S range estimates I'm getting is for All-purpose (~305 miles) is 10% less than conserve (~338 miles), thus my question about the EPA estimate of 321. Does the EPA doc mention % of time in conserve vs sport? I coudln't find that detail.

Rivian opted to use the most economical and least economical modes that can be left in day-to-day for testing and split the difference for the EPA rating. Off-road resets to all-purpose the next day.

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