The 27-year-old winger had a number of options during the summer transfer window following his departure from Reading at the end of the 2015/16 season but opted to join Albion on deadline day.
Robson-Kanu signed a two-year deal, with the option of an extra season, and has admitted to gaining some insight from Wales national teammate Chester regarding the West Midlands outfit.
"It's good to have someone who knows about a new club to tell you about it and James spoke highly about Albion," he told the club's official website.
"And I've got no worries about my fitness. I'm a fit lad and I'll be more than confident when called upon.
"It's about the group, the squad being successful and I am really looking forward to playing my part."