Just found your website and I think I will be sticking around to read the really useful information!
Anyway, I am in the early stages of planning a EV conversion of an offroader - a Toyota Landcruiser 79 Series pickup Single Cab. Currently it has a 4.2 diesel. Its been modified to carry 8 people with full seating, etc (its currently used as a Safari taxi in Kenya).
As its current role is very slow bush driving (some steep slopes, bit of mud, etc) I need to look at a decent powered AC motor thats fully sealed and water cooled.
I based my math on a gross weight of 3300kg, a Cd of 0.49 (which I doubt is that important as the vehicle top speed will be quite low), and based the drag forces at 30mph to be around 191.6N. I did calculate total forces to be 407N at 30mph, but I may have got a bit of math incorrect there.
However, I need to figure out the best battery/motor combo to use in this project. The car is going to keep the existing drivetrain (4wd is quite important). It currently has 180ltrs of fuel and the drives average is about 9-15lts per 100kms. the current max power is 96KW from the diesel engine. The drives can vary from 20km to up to around 150kms and the normal range with 2 full diesel tanks is about 900kms.
So, while I am hoping you guys may be able to help is - what do you think the feasibility is of doing a good ev conversion to get this to work in this situation? Also, would having a generator onboard to extend distance be a possibility?
From what I can tell, I am really wanting is putting an AC motor (possibly the siemens one?) with as much LiFePO4 batteries as possible. As it does do alot of up hill and down hill, regenerative braking will definitely help with some of the range.
Thanks guys, and while I'm still reading up on alot of EV conversion books that I bought, I think I might spend alot of time on this site reading up your notes.