When I moved my suppressor, I did have to use extra wire. Reason was the original install was by the dealer and they put it under the kitchen counter behind the breaker panel and not much excess wire between them. Don't know why, it was a major pain it the lower parts to get it out of there. Could not have been much easier getting it IN there. But I still have some left over 6/3 NM W/G cable from wiring up a 50A subpanel in the garage at home, so I didn't have a problem getting it positioned where I wanted it. I did have to buy a few feet of 6 gage wire to move the converter, though.
All in all, not a real expensive mod, but definitely an uncomfortable one.