As my tag says - retired farmer!

But I have an electrical engineer friend who says "Not possible!"

As a farmer I have overcome many a practical problem - but lets take a look.  What you are suggesting is this.

Have a front wheel drive electric car that needs 10 amps to drive it. Simple!

Now put two generators into the rear wheels, and extract 20 amps from them!  That situation takes us back to the B******* word!

AHAH - I hear you say -  but this vehicle is being towed!  By some means using the 10 amp motors to generate 20 amps.

Convince me that I am wrong!