Prius inverter question

Bob can't say that, since he doesn't know how many amps your system is providing. That depends on the inverter you have and the load attached to it. But he's saying that if you have a 1KW inverter, you'd need 2 gauge wire. Keep in mind the fuses in your system, obviously you don't want to blow the fuse supplying voltage to the 12V battery (aux) from the 200V battery (traction battery for the HSD). There are more threads talking about this, they're worth reading.