What is this and where does it go. I think it is some kind of converter, and goes in the side box where the shore cord is stored. The previous owner Jury rigged the cord to work with out this box. He ...
I think it looks like a transfer switch too. $300 seems rather steep for a transfer switch, but maybe once you pay someone through the nose to install it....
Are there any labels or other identifying marks/numbers/information on the box?