[Duncan]

Hi Jet

I would expect to need MORE power at highway speeds in your BMW - weight is not as important as aerodynamics!

Teslas get 300 miles out of 100 kwh - 3 miles/kwh - my 800 kg Device gets about 28 miles out of 14 kwh - 2 miles/kwh

Your BMW will be a lot better than my Device - but I suspect 10 modules will only give you about 180 miles

 

[Duncan]

Good points - I get twice the distance at "town speeds"

 

[Duncan]

With modern tyres and a modicum of care I would simply eliminate the spare wheel
Take one of those aerosol tubes of tyre gunk instead

 

[Duncan]

Hi Paul

Don't forget that the Tesla unit will see wheel torque not motor torque

The further apart (fore/aft) that the mountings are the lower the loads that your mountings will see