Originally Posted by ziggy12345

Errr. Double the voltage means double the power. 14V x 100 amps is 1.4 Kwatts where 28v x 100 amps is 2.8 Kwatts.

I am getting the stuff together to convert my Evolva into electric. Like you i need the run time to be able to run 15 mins and have batteries that can be changed in 30 seconds. I can then compete against IC 1/8th cars

Cheers