hi i have a motor is a 13.7kw 48v i still need to measure it regarding inches. How much voltage do you think i can give it?. I would like to give it at least 72v i am still looking for an affordable and efficient controller. I want to power a small car ,which is about 1000kg or less , in Malta we have a lot of hills so i think that the extra torque is needed for stop start hills. I am not thinking for racing yet. can you give me some advice pls?