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May 28, 2021
My garden tractor has two electrical systems a 40V which operates the traction motor, and a 12v system which operates the forklift and possibly other additions.
So it has been my practice to use the tractor chassis as the ground, I just run a positive lead to anyplace I need power, and connect the negtative lead to the tractor chassis. Right now it is working fine with no BMS, but have almost finished the final traction batt with its BMS but want to be certain that it will be good before burning out expensive components.
I will have two BMS's connected one for the 40 volt batt., and the other for the16 (12) volt, will the BMS's be happy sharing a common negative. Brain and experience tells me no worries, buut???