One suggestion... An alternative to, and probably more available
than a powered hub or the car itself could be to simply connect the
OVMSv3 module to a standard micro USB AC adapter, such as the one
used to charge a cell phone or tablet. With the shift to USB-C, we
probably have a drawer full of the now-older models laying around
unused. I assume a standard 1A unit would be sufficient, right? If
not, what is the minimum power required?