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Unless you are running around your own property, it sounds like "I ran out of charge and my friends had to tow the heavy pig back". If you want it for economy it might be one thing. If you want torque, install a diesel.
Stinking, rattling diesels out in the woods aint my thing. If one shows up to wheel with us, they have to be at the end of the line. And a new guy gets stuck being in front of them. Lol

On an average trip, we do about 10-15 miles. I burn about 10 gallons of gas, depending on terrain.
I think it could work.
 

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l am all in on this. I have also wanted to do this. I am in the battery market sector (Li-Ion) and I think this is a fantastic application particularly rock crawler for the reason Skiz Riz pointed out of 100% torque at any rpm. You will not need near as much battery as a Volt/Leaf/Tesla as you really don't need the range or speed of these vehicles. I am curious of your choice of motor and number. It may may make sense to go with hub motors at each wheel but I have not found any that were durable / cost efficient. I think it definitely makes sense to go Li-Ion as I think you could go with about 12 kWh and probably keep the weight under 1,000 Lbs.
My thought on how to do it simply, would just be the electric motor coupled to a manual transmission and transfer case. That way you could pick the optimal RPM range for the motor to work in while crawling. Being able to lay out the batteries for weight bias would be a big plus in a crawler.

I'm definitely fascinated by this project, and can't wait to see it unfold.
 
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