Scout concepts on Jay Leno’s Garage

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My opinion is that EVs should be quite, same with Hybrids unless they’re engine is running which engines today are pretty silent.

And to comply with the regulations for the reverse sound on EVs there should be options I think. Tesla sounds like a UFO and Rivian Sounds like loud wind. Personally i would like my reverse sound to be the sound of a fart…JK. But maybe there’s sound of the Comanche for the Scout heritage.
 
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I am still going through the video, but "Steady State" might be part of the issue. They want the Harvester to provide enough electricity to maintain a steady state at 70mph. Hook up a trailer, and the amount of energy to tow at 70mph probably doubles. If the Harvester can not provide that level of power, there will be no steady state (you will be draining the battery). At some point, they could partially address this in software - They are already planning a mode that starts the Harvester early for performance. They would just need to see what it can handle and for how many miles. Perhaps you could get 7-8k of towing if you plan ahead and accept you are towing with an EV with a range extender - that will still need periodic charging during the trip (as opposed to just adding gas and keep driving).
This is where I need clarification. Is the 70mph steady state only applicable when towing, or is this for using harvester only when NOT towing? Only being able to go 70mph after the 150 all electric miles would be devastating.
 
This is where I need clarification. Is the 70mph steady state only applicable when towing, or is this for using harvester only when NOT towing? Only being able to go 70mph after the 150 all electric miles would be devastating.
It’s not saying you CANT go over 70mph, it’s implying if you go over that the generator may not be able to maintain a steady state of charge so the additional 350 miles will be compromised. Unless I’m misunderstanding it!
 
I’m sure the engineers have good reason but it is a bit disappointing to learn the Traveler Harvester tow limit is 5000 instead of 6000. Hopefully it will still be built as a serious work vehicle, capable of regularly towing close to 5000 for long distances. And that the tow mode software will manage the battery to leave plenty of room for regenerative braking on downgrades. Still looking forward to getting my Traveler Harvester!
 
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I heard that as well. Interesting. Just can't imagine after 150 miles of EV (75 if towing) the Harvester kicks in and can charge fast enough to power a 8k pound truck towing a 7k trailer at hyway speeds for another 350/2= 175 miles. I am not an engineer but I am predicting the only way towing will work with Harvester is if it kicks in from the get go.
Yes, what I’ve been expecting and Scott seemed to imply is that the generator will run as needed to keep the battery with a reasonable amount of charge.
 
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It’s not saying you CANT go over 70mph, it’s implying if you go over that the generator may not be able to maintain a steady state of charge so the additional 350 miles will be compromised. Unless I’m misunderstanding it!
I would like clarification on whether this is just while towing or if it applies to all driving. I know much of this thread is about the reduction in towing capabilities, but 5000 is fine with me. What has me worried is if the performance drops significantly when the harvester is required vs just a well charged battery. If there is a difference, it should be clearly communicated.

I realize absolutely nothing is locked down and I have no intention of canceling my reservation anytime soon, but do want to express this concern so that the team has an opportunity to address or provide clarify when specifications are more fixed.
 
My guess is that they don’t exactly know, so this is a situation where the CEO knows to under promise and over deliver. Steady state/flat at 70 mph with my 4xE is around 70kwh needed, 80 jumps up quite significantly. (I’ll have to test for more exact numbers on my next freeway drive). This isn’t a v6 generator so there has to be limits…limits with towing, range and speed or else they are going to have unhappy customers post purchase who think they can go 90mph while towing 8k at a 15% grade and expect the harvester to keep up.
 
I can only make guesses. But in EV, you will run most of the battery down before you get a warning - which could in theory put you into a slight limp position if you go to hybrid and still want to exceed the steady state. In Hybrid, it will either have a set point to turn on the harvester, or calculate it based on how hard you are driving - but my bet is to maintain maxim combined range. In performance mode, the harvester will turn on quite early so conserve EV only to times when you exceed the steady state - as on long high speed road trips you might get multiple tanks to the charge (but if you are exceeding steady state, eventually you will need to charge - even if it is off the harvester).

My guesses are a bit more random when it comes to towing. I have no clue if the 5k limit is due to a powertrain issue caused by the compromises to get the harvester in at a reasonable cost - or if they are due to the increased load massively changing the Steady State speed.
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Pulling from memory - a 140kwh battery will give us 350 miles - 2.5 miles/kw. Using that as a base - then a 60kwh battery would do 150 miles. Now assuming the harvester can do 350 miles at the same speed (assuming 70mph) - then the generator would be running 5hrs and generating 140kw - so 28kw generator. I think these are all reasonable numbers. If towing 1/2's ev range, then I think it is safe to assume that it will do the same with the Harvester. If you are using 28kw/h to maintain a steady state at 70mph, if you double the load, the battery will need to be kicking in 28kw/h to maintain the same speed while towing. The BEV will give you a 175 mile range, but the battery in the harvester will run out of amp hours after 2hrs - so it will only give you 140 miles of range (even with the harvester running the entire time). It is not something I would really want to advertise-especially if you are selling a cure to range anxiety.

Now that extended calculation is flawed in many ways. It is assuming the Harvester is steady state at 70mph unloaded. If it is larger than this and the steady state is with a 5k tow - then you might get a few more miles off the smaller EREV battery if you exceed the weight or speed. It is also assuming you loose 1/2 the range with a 5k tow - which might be excessive. Perhaps you only loose that much with a 10k tow. Honestly, need a lot more info for anyone to determent if the trade offs work for them.
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just a quick google. Normal temps (not freezing), owners have posted a 1/2 range loss with a 10k trailer and 1k of vehicle payload (gear and passengers). If we use these losses - then the 5k tow should look better. Second google - wind drag is probably as big of factor as weight. Cybertruck ranges with a lighter camper still sucked kw's.
 
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As Scott Keogh mentioned, there will likely be three settings for the Harvester generator. Perhaps one mode for normal short-trip driving, where Harvester only kicks in when the battery is depleted to a certain low point. A second mode could proactively charge while driving (or when stationary) when the battery is able to take the power, perhaps at 50% capacity. And a third mode for heavy duty (towing, etc.) where Harvester begins running while there is a heavy demand for electricity and the battery has enough capacity to provide additional power when needed then absorb power when coasting or under light loads. Think of it like maintaining or refilling a reservoir during various peak demands.
 
I understand folks who really want the Harvester option and I am all for it if it helps SM sell more vehicles. After listening to this Jay Leno piece I worry that the Harvester is thier main focus not providing the best total EV vehicle that they can. I.e getting 400+ range with 10,000 pound towing capacity.
 
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@Jamie@ScoutMotors I don't know if this has been clarified yet, but the 70mph steady rate? that was implied for when towing or when the harvester is harvesting, no matter if towing or not?

We haven't said anything officially at this point. This is still fluid and being optimized, so lets see as we get further along in the process.