[MrForbes]

"ground" is not something we really have on FRC robots.

Good question, I think you lose voltage on each wire, but I don't' really know, since I'm a mechanical guy. How about measuring the voltage at both ends of the wire run, under load? or measure the voltage across each of the wires, under load.

This is something we get to deal with on underwater robots. I expect that 148 gets to deal with it on their tether, too. On the underwater robots, with a surface mounted battery, we run a higher system voltage, so a specific voltage drop is a smaller percent of the total voltage available. And with a higher voltage, there is less current for the same amount of power, so the voltage drop is less also.

But they don't let us run four 12v batteries in series in FRC....only NURC let us do that.