Same here with sharing his concerns. I’ll add two related ones - (1) being the guinea pig / beta tester on a completely new design from a completely new company that’s never built vehicle at scale before, and (2) the service and support infrastructure. Still some big unknowns and risks for us early adopters.
This is true, but folks need to understand that it’s a relative metric specific to your particular vehicle.. If it takes 20 minutes to add 100 miles of charge in my Tesla, that really doesn’t mean much for a Rivian. The Rivian will be far less efficient, so that 20 minutes (assuming the same power output from a charger) will get me far less in my Rivian. Miles per minute of charge is going to be dependent on what that particular charger’s output wattages is, and can be variable if there are multiple charging stations feeding off of a common source that has a maximum output.
So long as you verify that the output of the charger equals
Is that 140 EPA rating miles, or real world miles? I'm guessing the former. My BEV motorcycle has a rated 100 mile range; I get 50 real world miles. I take all these stats with lots of salt. We just have to wait and see what the real world mileage and charging rates will be like. Where are the vaccines?
No, I'm not going to do that. The statement was made to get the knee jerk reaction it gets with the hope that the second reaction will be to ask yourself "Am I nuts or is this guy nuts? Let's think about this for a minute."
The "equalizer" (the parameter you should be looking at) is the vehicle's consumption i.e. it's watt hours per mile just as in comparing ICE vehicles you compare miles per gallon.
No need to do any detailed analysis. You should know the Wh/mi for your vehicle. When you sit down in a Tesla there will be a screen (if you have selected it to be displayed) that shows you how many Wh/mi you consumed on your last trip, since your last charge and during the travel recorded by two odometers (many Tesla owners never reset one of these so that it shows you average consumption for the entire time you have had the car). So even if you don't know your car's consumption it will be shown to you. In addition to that, as you drive, there are displays that show you consumption as you go so that you can easily detect unusually high or low consumption caused by winds or stuff on the road bed. Upon arriving at a charger you simply multiply the miles you want to replace by the rate you estimate and divide by the charger's capability.
Ja sure. But there's no mystery here. If your Rivian sucks twice as much energy per mile as your Tesla it's going to take twice as long to load 100 miles from the same size charger into the Rivian as the Tesla. That's why the most important parameter descriptive of what your car does is Wh/mi under various driving conditions.
Ja sure again but as your bio says you have an S you should know what to expect, on average, from V2 and V3 SCs You should also know that EA chargers don't share power the way the old Tesla V2s did and that the Tesla V3's don't either.
Well it's hardly rocket science but it is, as noted above, going to be much easier for those who regularly deal with the world on a quantitative basis that it is for your average professor of Italian renaissance literature.
There are two factors of equal importance: the amount of emergy you must take on and the expected rate at which the charger will give it to you. The amount of charge required depends on the distance which needs to be added and, the cars most important characteristic, its Wh/mi. Other than that a higher rated charger will do the job faster than a lower rated on most of the time you can't say too much until experience tells you what to expect from the given levels. For example, a CharIN 350 kW charger won't ever deliver more than 300 kW to a Rivian because the Rivian won't accept more than that. Remember that the car is in charge (no pun intended) and the rate at which it accepts charge depends on things like temperature, charging history and SoC.
Just as you should have learned the consumption characteristics of your Tesla you should have learned its charging characteristics so that for planning charges at a 150 kW charger you should use 80 kW as the anticipated rate (if that's what your charging habits actually give you). Similarly, when you get your Rivian you will learn what to expect it to take from an HPC350 charger.
The miles added per hour represents an attempt to "dumb it down" and it also presents opportunities for the marketing types.
None of the above. It is based on the "facts" that the truck will consume about 450 Wh/mi (the actual number will be based on EPA testing - 450 is my guess as to what that number will be) and that, evidently, the charger will, in a typical cycle, deliver an average power of 189 kW. Thus in 20 minutes it can load 63 kWh useable charge into the vehicle. 63 kWh divided by 0.450 kW/mi = 140 mi/hr. It represents a nominal number which you can use for planning purposes just as the first quote suggests.
