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My observation has been that energy performance is mostly due to a head wind or tail wind during highway driving. Colder temperatures tweak it down a bit, but generally I run 1.3 mi / kWh with a headwind and 1.9 mi / kWh with a tailwind (outside temps 20 - 40F).

During subzero weather, I try to fast charge prior to each leg of a 90 mile commute in order to get the battery up to 70 - 90F for the road trip thinking that it would improve efficiency. It does not. I got 1.6 mi/kWh and 1.2 mi/kWh there and back with a warm battery the other day when it was...

Same impression. 0F the other day, drove 92 miles getting 1.3 miles/kWh in the morning and got 2.1 miles/kWh driving back in the evening. Morning headwind was 15 mph and evening headwind was 12 mph

It is not clear to me how or when preconditioning kicks in when using navigation. To date, I do not see much improvement in battery temperature during cold weather navigation to an EV charger, but I speculate that I enter the navigation request too close to the charger (within 5 miles) to...

Not to impugn what you all say, but I am reminded of the book: To Engineer Is Human: The Role of Failure in Successful Design by Henry Petroski

Environmental stress significantly impacts the reliability and functionality of metal-plated components, especially concerning their electrical conductivity. Over time, stresses such as mechanical vibration, thermal cycling, and even the stress of repeated electrical currents can lead to metal...

I notice during cold weather fast charging that the battery temperature undergoes a temperature flux from 30F to 90F, and I wonder what the impact of recurrent 60 degree fluxes will have on battery integrity or its compartment over time.

I think the battery temp can make somewhat of a difference in range. In cold weather, I get 1.3 mi/Kw if battery is 35F, but get 1.8 to 1.9 mi/kW if the battery is warmer (45F +)

0 - 20F highway travel with Gen2 RT1 max w/ 22" aero's results in 1.3 - 1. 7 mi / kWh going 75 mph and typically 5 - 10 mph headwinds.

True, but a corporate battle cry at Rivian has been "under promise and over deliver". The max pack does not fulfill this goal and -10F weather here in the north makes range anxiety a certifiable medical condition.

Just read an article how Chinese EV companies are blowing away the Euro and American car companies which can no longer make a profit in the Chinese market.

If you are 60+ years old or a rocker, it is unlikely that you'll hear anything at the 8K and 16K frequencies.

Is there a ceramic coat or other protective film for windshields ?

Bait and switch is exactly what is going on with the revised voucher policy. I pre-ordered a Quad Max RT1 in Feb 2019. I have been patient and continue to be patient until this vehicle is produced under the original agreement. It's not early adopters' fault that Rivian prioritized a dual and tri...

Here is ChatGPT reply: In the grand scheme of EV efficiency, factors like battery capacity, motor efficiency, aerodynamics, tire resistance, and driving behavior tend to have a more significant impact than the length of the wiring harness.

If the wire harness is being reduced and tow hooks deleted, will these refresh changes improve vehicle range ?

I appreciate your thought, but wonder what corporate generosity has to do with a more than implied if not explicit contract. The company invited early adopters at a reasonable price and the fact that they could not deliver in 5 years is not a matter of generosity. On the other hand, fulfilling...

Thank you for your your archived e-mail. Rivian had a max - pack quad configuration early - on and I did not see any specific language that they would not honor the early adopter max quad once it became available.

Do you happen to have a back copy of the e-mail stating that future max / quads were exempted from the early price commitment ? I don't recall seeing that.

Honestly, Rivian communication has been confusing. At one point, we were told that the Max Pack Quad was being delayed and one could retain that order with an indeterminate delay and then we were told that all of the Max Pack Quads were converted to Max Pack Dual without any option for the...