CR report on EV range tests

[nmope]

They really are all quite similar.

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[kindofblue]

They really are all quite similar.

Definitely bookmarking this page. Thanks.

 

[DaleL]

Okay, how is Tesla's "Official EPA" mileage 20% higher than what you get in the best of circumstances? Does EPA simply trust manufacturers to tell the truth?

The Consumer's Reports range tests need to be taken with a grain of salt. They turn off the heating and air-conditioning. Thus cars with a heat pump (Tesla) gain no advantage in cold driving. They set the EVs into their less-aggressive regenerative braking mode. Tesla uses a simpler brake system with regenerative braking controlled just by the accelerator. Whereas Ford, VW, etc. incorporate it into the brake pedal as well. This puts Tesla at a disadvantage.

Nevertheless, the Tesla EPA range is exagerated by about 10% relative to other EVs, based on Edmunds and other tests.

https://www.consumerreports.org/hybrids-evs/how-we-test-range-of-electric-vehicles/

 

[awp0]

Tesla uses a simpler brake system with regenerative braking controlled just by the accelerator. Whereas Ford, VW, etc. incorporate it into the brake pedal as well. This puts Tesla at a disadvantage.

Can you explain this a little further? I'm genuinely curious about this, and how it would put Tesla at a disadvantage in the test.

 

[Mach1E]

The Consumer's Reports range tests need to be taken with a grain of salt. They turn off the heating and air-conditioning. Thus cars with a heat pump (Tesla) gain no advantage in cold driving. They set the EVs into their less-aggressive regenerative braking mode. Tesla uses a simpler brake system with regenerative braking controlled just by the accelerator. Whereas Ford, VW, etc. incorporate it into the brake pedal as well. This puts Tesla at a disadvantage.

Nevertheless, the Tesla EPA range is exagerated by about 10% relative to other EVs, based on Edmunds and other tests.

https://www.consumerreports.org/hybrids-evs/how-we-test-range-of-electric-vehicles/

Yes, that is because Tesla uses the 5 cycle EPA test rather than the 2 cycle everyone else uses.

Why? Because they are allowed to use a different correction factor in the 5 cycle test which allows for a higher EPA range number.

This article explains it in detail-
https://cleantechnica.com/2023/04/2...as-are-wrong-much-of-the-time-in-the-usa/amp/

Unfortunately consumers wrongfully assume that every manufacturer uses the same test, so they think the Model Y has more range than the Mach E……. When multiple 3rd party tests prove the opposite is true.

 

[Mach1E]

Can you explain this a little further? I'm genuinely curious about this, and how it would put Tesla at a disadvantage in the test.

Teslas are more efficient in 1PD with maximum regeneration.

The Mach E gets the same regeneration regardless of the mode (hitting the brake pedal uses Regen).

So basically the mode doesn’t affect efficiency for the Mach E, but it can for Tesla.

 

[awp0]

Teslas are more efficient in 1PD with maximum regeneration.

The Mach E gets the same regeneration regardless of the mode (hitting the brake pedal uses Regen).

So basically the mode doesn’t affect efficiency for the Mach E, but it can for Tesla.

Thanks. I guess my confusion is why the fact that the MME brake pedal uses regen is important. Is the assumption that because the test uses "less-aggressive regen mode", that means whisper without 1PD, and therefor the testers must have been using the brake pedal?

 

[Mach1E]

Thanks. I guess my confusion is why the fact that the MME brake pedal uses regen is important. Is the assumption that because the test uses "less-aggressive regen mode", that means whisper without 1PD, and therefor the testers must have been using the brake pedal?

That sounds about right.

 

[dbsb3233]

Teslas are more efficient in 1PD with maximum regeneration.

The Mach E gets the same regeneration regardless of the mode (hitting the brake pedal uses Regen).

So basically the mode doesn’t affect efficiency for the Mach E, but it can for Tesla.

Although for practical purposes, it's mostly irrelevant. By that I mean where people mostly care about range is on road trips, not locally. And road trips are about highway cruising where you're almost never using the brake.

There's exceptions, of course (like people that have a really long local daily commute), but for the most part range is a non-issue locally. And that's where we have lots of stop-and-go driving where we can brake a lot.

The 70 MPH range tests (which are mainly highway cruising) should be legit.

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