Hi,vpoppv. Thanks for the link, I Have a westburg(?) I got from EV America. Wish I knew about these before, the one I got was 59.00
I have the shunt between the motor lug S1(?) and m- on the controller for motor amps. Dont know where you would have it for battery amps. Diy controllers arent my first choice either, but if I build it, I cant blame anyone but me if it doesnt work, and maybe I can fix it. Watt.