sync:
Hi,
Everything going well about this project. I have one question... For test purpose, is there a problem running my 24 Volts DC 450 watts motors with only one 12 Volts battery ?
If the motors are intended for operation at 24 VDC they might not perfom as well, or depending on what you are trying to do with them, at all with only a nominally 12 VDC supply. I think that this possibility would limit the usefulness of any results your testing yields.