My ags was $140 retail
https://www.amazon.com/Xantrex-809-0...3139354&sr=8-7
The operating manual shows it was a two wire splice that took about 10 minutes.
You need to get away from that dealer.
Why would the dealer and manufacturer have to work together to splice two wires to a THIRD PARTY, MADE BY NEITHER OF THEM generator? There isn't a single reason in the world for the dealer to contact Winnie about either the ags or the black tank.
You're being lied to in the 'he will believe any damn thing you tell him. If we lie enough, maybe he will go away' most hateful possible way.
Your research needs to be research, not an air quote from a dealer. I'll estimate there are 1500 posts on black tank washers and 400 on ags installs on this forum alone.