Battery Size kWh estimated

[timmyhil]

Thanks to @SpaceEVDriver for sending me down a rabbit hole of calculations after bringing it up on the Official Scout Community Forums.


Scout ii, quick fact in case anybody wants to do it when you convert its 20 MPGe to kWh it gets .593384

Scouts possible Efficiency number (averaged from Scout 2 1980 and Rivian): +/-1.735

Mileage on each possible battery kWh to reach the expected range on battery:

350miles Full Electric

150miles On Battery for Harvester



Harvester-

75kWh: 130miles

80kWh: 138miles

85kWh: 147miles

90kWh: 156miles

Fully Electric-

175kWh: 303miles

180kWh: 312miles

185kWh: 320miles

190kWh: 329miles

195kWh: 338miles

200kWh: 346miles

209kWh: 362miles

All calculations could be: +/-

***(mind you this is all math related, without any software system that will optimize battery usage so calculations of these numbers could be off slightly)***

 

[dleepnw]

The Rivian R1T goes ~300 miles with AT tires and a ~135kWh battery. the Terra is a bigger vehicle but i'd imagine it will get similar efficiency (probably slightly worse) assuming their engineers are as good as Rivian's, so it should be able to get 300 miles with a 140-145kWh battery

 

[Goose]

Your math has to be off. The Ultium truck platform has a 212Kwh battery and they go in the mid 400 miles, in a vehicle much bigger and heavier than the Scouts.

My estimate, purely speculation based on nothing more than noggin math comparing other vehicles, is 150kwh battery pack in BEV trucks. The R1T Max Tri has a 141kwh battery and is good for 370 miles EPA.

 

[timmyhil]

Your “noggin math” could be off. Since we all have zero clue to what its efficiency number is. The 1.735 was an averaged number from Scout ii and Rivian.

 

[Timmdodge60]

These are my Scout BEV estimated battery sizes.

Based on these current examples of similar BEVs:

2025 Rivian R1S (SUV) Dual Standard: 79 MPGe combined city/highway driving

2025 Ford F-150 Lightning Flash (extended range battery): 70 MPGe combined city/highway

This is the EPA formula for calculating MPGe:
(Miles/kWh) × 33.7 kWh/gal = MPGe

My guesstimate for the Scout BEV Terra battery size for the 350 maximum range:

2027 Scout Terra BEV combined MPGe: 75

Terra miles / kWh x 33.7 = 75 MPGe

75/33.7 = 2.23 miles/kWh

Estimated 300 miles of combined city/highway range (based on 350 max range):

300/2.23 = 135 kWh battery

My guesstimate for the 2027 Scout Traveler BEV MPGe: 79

Traveler miles / kWh x 33.7 = 79 MPGe

79/33.7 = 2.34 miles/kWh

300/2.34 = 128 kWh battery

For economies of scale and modularity, I'm guessing that a 130 kWh battery would be used for both.

But with continuing battery and EV efficiency improvements, it is likely that the battery size needed by the time of production will be less than 130 kWh to get the targeted 350 miles of maximum range.

 

[timmyhil]

130kWh would only be used for the Full EV.

Since the Harvester only get 150miles on battery it would be less than 130kWh

 

[Timmdodge60]

130kWh would only be used for the Full EV.

Since the Harvester only get 150miles on battery it would be less than 130kWh

Correct.

 

[timmyhil]

Correct.

If i was to go with a 2.22 as the efficiency i would have probably gotten closer to what you got. But i decided to do an average between Rivian and Scout 2 stupid on my part lol.

 

[MikeTZ]

I have Owned Rivians the last 3 plus years and have driven 40k plus miles . The average is around 2.2 Miles/kWh. These numbers are based mostly on Highway driving in South Florida. I think a better approximation for the Scout battery size should be miles/2.2.

 

[maynard]

I have Owned Rivians the last 3 plus years and have driven 40k plus miles . The average is around 2.2 Miles/kWh. These numbers are based mostly on Highway driving in South Florida. I think a better approximation for the Scout battery size should be miles/2.2.

Wouldn't that number only make sense for warm weather climates like yours?

 

[MikeTZ]

Wouldn't that number only make sense for warm weather climates like yours?

Yes... however it is a good estimate number for calculating the battery size. The A/C load on hot humid days in South Florida eats up battery especially pre-cooling the car when parked under the noon Sun.

 

[Goose]

I have Owned Rivians the last 3 plus years and have driven 40k plus miles . The average is around 2.2 Miles/kWh. These numbers are based mostly on Highway driving in South Florida. I think a better approximation for the Scout battery size should be miles/2.2.

so 350/2.2 is 159, I’m not too far off with my guess of 150.

 

[timmyhil]

so 350/2.2 is 159, I’m not too far off with my guess of 150.
[/QUOTE

Scouts will have 33”-35” AT tires. Probably around 160-175kWh because of the loss from the tires. Don't get too excited everyone lol.

 

[Goose]

And Rivians run 34.1” and most people are reporting around the same 2.2mi/kwh

 

[timmyhil]

And Rivians run 34.1” and most people are reporting around the same 2.2mi/kwh

Rivian don't run knobby tires like how the Scout is running KO3. Rivians run Pirelli Scorpions.