Questions about the Harvester

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Something that could tow a 18-foot 3500lb load 200 miles at freeway speeds on 100% EV is a $250K vehicle with current technology. Better batteries are coming, but in the near future, you will have to adjust your expectations.
Chevy silverado 8wt 496 miles. That's more like 250 with my trailer. 77k. Available in 2025. That said I reserved the Terra EV. I have faith they will get the 200 I need for my trailer
 
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Yes twice a month on five +day trips so more like 50 % of the time. Your right though it's not for me I changed my order. Hoping that battery will grow on the EV Terra. I just misunderstood what the PHEV does. I wonder if others have as well?
I Do basically the same thing. I live in ID and travel down to southern Utah. sometimes towing sometimes not. To me the harvester makes perfect sense for that. on those trips I will essentially be using 95% gas. I would imagine that a 5 gallon jerry can would get you a long ways. plus if it has different modes you could maintain a mostly charged battery in order to drive out if the engine broke down or you ran out of gas.
i like the idea of options. I'm also hoping the harvester will be able to provide cabin heat, as that is a huge drain on EV's.
 
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I Do basically the same thing. I live in ID and travel down to southern Utah. sometimes towing sometimes not. To me the harvester makes perfect sense for that. on those trips I will essentially be using 95% gas. I would imagine that a 5 gallon jerry can would get you a long ways. plus if it has different modes you could maintain a mostly charged battery in order to drive out if the engine broke down or you ran out of gas.
i like the idea of options. I'm also hoping the harvester will be able to provide cabin heat, as that is a huge drain on EV's.
Wonder how big the on board gas tank is to get 350 miles while charging the batteries when in transit? Any way 150 (75 when towing) mile battery just seems to defeat the whole ev purpose but hey we all want Scout to be successful so what ever that takes is good in my book. Hopefully with this new American factory with thousands of Americans jobs will keep the new administration from canceling the tax credit.
 
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Wonder how big the on board gas tank is to get 350 miles while charging the batteries when in transit? Any way 150 (75 when towing) mile battery just seems to defeat the whole ev purpose but hey we all want Scout to be successful so what ever that takes is good in my book. Hopefully with this new American factory with thousands of Americans jobs will keep the new administration from canceling the tax credit.
We can hope. That would certainly help-even if just the first sales year to ensure success of the company
 
Yes twice a month on five +day trips so more like 50 % of the time. Your right though it's not for me I changed my order. Hoping that battery will grow on the EV Terra. I just misunderstood what the PHEV does. I wonder if others have as well?
Keep in mind the ranges quoted are usually accurate around 35mph. So a 400 mile range EV will only go about 200-220 miles at interstate speeds.
 
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Speculation I've seen, I believe on here and the ScoutEV Forum, is that there will be a 10 gallon tank with the Harvester package. Speculation is, of course, just a guess. That's 35 mpg if it turns out to be correct, and a it adds 350 miles to the vehicle's range. I think that all range estimates - pure EV or Harvester - will be cut in half when towing a significant load. So effectively 17.5 mpg with towing, plus battery mileage.
But really, when I'm towing my Wrangler behind my current SUV right now, I'm getting 8-11mpg which, effectively cuts my range in half or worse. So in that context, I will get just as much or more range with objectively better economy while towing my 5,200lbs with the Traveler Harvester as I do when towing with my Grand Cherokee. I think part of Scout's target market for the Harvester is people who plan to distance tow, and it's a better solution for that purpose than any other electric vehicle on the market today except maybe the Ram.
 
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Keep in mind the ranges quoted are usually accurate around 35mph. So a 400 mile range EV will only go about 200-220 miles at interstate speeds.

Maybe when towing. Not when just driving on their own. Inside EV's test highway range (70 MPH):


EPA ranges quoted are "combined", so less is expected on highway.

Ford Lightning for example gets 16% less range, not 50% less:

Ford Lightning Lariat Extended Range
70 MPH range tested: 270 miles
EPA combined: 320 Miles
Difference: -15.6%


Also not everything gets less range when tested as there is a lot of leeway on EPA testing - Manufacturers are free to underrate their range:

Cadillac Lyriq RWD w/20" Wheels
70 MPH range tested: 330 miles
EPA combined: 312 Miles
Difference: +5.8%
 
Speculation I've seen, I believe on here and the ScoutEV Forum, is that there will be a 10 gallon tank with the Harvester package. Speculation is, of course, just a guess. That's 35 mpg if it turns out to be correct, and a it adds 350 miles to the vehicle's range. I think that all range estimates - pure EV or Harvester - will be cut in half when towing a significant load. So effectively 17.5 mpg with towing, plus battery mileage.
But really, when I'm towing my Wrangler behind my current SUV right now, I'm getting 8-11mpg which, effectively cuts my range in half or worse. So in that context, I will get just as much or more range with objectively better economy while towing my 5,200lbs with the Traveler Harvester as I do when towing with my Grand Cherokee. I think part of Scout's target market for the Harvester is people who plan to distance tow, and it's a better solution for that purpose than any other electric vehicle on the market today except maybe the Ram.

Unfortunately, that isn't realistic. Expect about 20 MPG Highway, on the Range Extender (physics), and more like 10 MPG when towing.
 
But remember the engine/generator is generating electricity to battery not to wheels so the generator should be running consistently whether towing or not as far as determine the fuel capacity range. The question will be how much energy does the final engine/generator produce based on efficiency.
 
Maybe when towing. Not when just driving on their own. Inside EV's test highway range (70 MPH):


EPA ranges quoted are "combined", so less is expected on highway.

Ford Lightning for example gets 16% less range, not 50% less:

This is better than I expected and way better than my personal experience (MachE and TMY). I should probably also reword my state to say "in 70mph zones" rather than "at 70mph". In a 70 zone most people are driving 78-82 (In Texas anyways). In the west there are 80 and even 85mph zones, which means people drive 90-100. Obviously range drops drastically the faster you drive.
 
For the tech experts. What is the engine/generator efficiency of current or future ev's?

Not sure what you mean by this. Can you explain the question more?

If it helps, the Yuuuuuuuge Hummer EV has an efficiency of somewhere around 1.6 miles per KWh of battery. The Rivians are somewhere in the ~2.1-2.4 miles per KWh of battery efficiency range.

I'm personally guessing that the Scouts will be somewhere around ~2 miles per KWh. Its smaller/lighter than the Hummer, and not as slippery as the Rivian (ie, normal door handles/etc), hence the guess of somewhere between (plus it makes math easy :D).
 
Not sure what you mean by this. Can you explain the question more?

If it helps, the Yuuuuuuuge Hummer EV has an efficiency of somewhere around 1.6 miles per KWh of battery. The Rivians are somewhere in the ~2.1-2.4 miles per KWh of battery efficiency range.

I'm personally guessing that the Scouts will be somewhere around ~2 miles per KWh. Its smaller/lighter than the Hummer, and not as slippery as the Rivian (ie, normal door handles/etc), hence the guess of somewhere between (plus it makes math easy :D).
Thank you. This is the information that I needed to learn something.....

Is there a current or future ev that you know the charging efficiency of the onboard motor/generator (like Scout Harvester or Ramcharger maybe).

Do not know enough to explain the question.... Similar value to the charging efficiency rating of solar panels, which I think is 15-20%??
 
Thank you. This is the information that I needed to learn something.....

Is there a current or future ev that you know the charging efficiency of the onboard motor/generator (like Scout Harvester or Ramcharger maybe).

Do not know enough to explain the question.... Similar value to the charging efficiency rating of solar panels, which I think is 15-20%??

There really isn't enough other EREV/Series hybrids out there to make a guess on that.

Also, your question is sort of two questions together.

1) You're asking about how efficient the onboard generator is.
2) you're asking how powerful the onboard generator is (I think).

I've shown the math elsewhere, but the cliffnotes version is this (broad strokes, not exact).

Pretend we're driving on the highway, at 70mph.

If we assume the Scouts go ~2 miles per KWh of energy, that means in an hour, we'd have used 35KHw of energy (70 miles/2 miles per KWh = 35KWh). For the Generator to keep up with the electrical usage, it needs to produce that much (net, NOT gross, which is where your efficiency comment comes in. Any efficiency losses from charging/whatever have to be accounted for there).

The next part is obviously the amount of electrical energy needed to drive increases if you're going faster than 70mph, going up a hill, towing a trailer, have a giant bike rack or something attached to your vehicle, etc.

We really only know of 3-4 EREV vehicles that have been, or been announced. There are the BMW i3 REX, which had 25kw of output (ie, if it ran for an hour, it would produce 25KHw). The Chevy Volt had a ~55KW generator. And the Ramcharger uses a 3.6L V6 to produce ~130-190kw.

I think we'll likely see a generator between the size of the Volt, and Ramcharger. I'd guess between ~75-100KW or so. But thats entirely conjecture. I just think they're not likely going to put anything smaller than what the Volt had, and will likely not match the Ramcharger in size (which is designed to tow ~14k lbs, a full 40% more than the Terra, so it makes sense that the Scouts wouldn't need as much, at least to me).

Hopefully that helps!
 
There really isn't enough other EREV/Series hybrids out there to make a guess on that.

Also, your question is sort of two questions together.

1) You're asking about how efficient the onboard generator is.
2) you're asking how powerful the onboard generator is (I think).

I've shown the math elsewhere, but the cliffnotes version is this (broad strokes, not exact).

Pretend we're driving on the highway, at 70mph.

If we assume the Scouts go ~2 miles per KWh of energy, that means in an hour, we'd have used 35KHw of energy (70 miles/2 miles per KWh = 35KWh). For the Generator to keep up with the electrical usage, it needs to produce that much (net, NOT gross, which is where your efficiency comment comes in. Any efficiency losses from charging/whatever have to be accounted for there).

The next part is obviously the amount of electrical energy needed to drive increases if you're going faster than 70mph, going up a hill, towing a trailer, have a giant bike rack or something attached to your vehicle, etc.

We really only know of 3-4 EREV vehicles that have been, or been announced. There are the BMW i3 REX, which had 25kw of output (ie, if it ran for an hour, it would produce 25KHw). The Chevy Volt had a ~55KW generator. And the Ramcharger uses a 3.6L V6 to produce ~130-190kw.

I think we'll likely see a generator between the size of the Volt, and Ramcharger. I'd guess between ~75-100KW or so. But thats entirely conjecture. I just think they're not likely going to put anything smaller than what the Volt had, and will likely not match the Ramcharger in size (which is designed to tow ~14k lbs, a full 40% more than the Terra, so it makes sense that the Scouts wouldn't need as much, at least to me).

Hopefully that helps!
Wow! Yes it does

Thanks to you I may eventually learn something....lol! 🤔💡
 
So using gas range extender twice/month is too much?

That kind of use case is the main point of PHEVs/EREVs.

You get to do your normal daily routine on Battery Electric, then occasionally (like twice/month) your burn gas for longer trips.

I mean if you only want to electricity all the time, even on longer trips, then a PHEV/EREV is not what you are looking for.
I have to agree, seems like the whole selling point of the Harvester. Most people will only dip into the Harvester for road trips and off road adventures or towing, right? Best of both worlds?