He used a wheelchair at times and also had his legs strapped into splints. He walks but says his condition can be painful.
"Doing things like band practice and playing shows, it's hard work for anyone ... it's probably 10 times more brutal on me but I don't consider it a disability.
"The only limitations you have are the ones you choose to believe in or put on yourself. With hard work and determination, there's nothing you can't do," says Perry, a freelance audio engineer who has always been interested in music and as a teenager began playing bass, then drums and guitar.
"What I wanted to do all the time was sing. Ever since I was a little kid I hummed melodies. I had this vivid picture of me being on stage playing guitar and that's still with me."
Inspired by Brett Scallions of the band Fuel and the late Kurt Cobain of Nirvana, Perry says this year was his band's first time in the Battle of the Bands.
"We are quite blown away with how far we have come so quickly."
Perry says it is rare to see disabled rock musicians performing, although he has met one online, an American with cerebral palsy.
Battle of the Bands organiser and promoter Andrew Featherstone says it is rare but not unique for contestants to have disabilities.
"We have had blind and deaf musicians take part before.
"Anybody with disabilities is most welcome to get involved. We applaud that. It's nice to see somebody with a disability not let that restrict their opportunities."
Battle of the Bands
• More than 130 bands entered.
• Regional finals held in seven cities.
• Finals in Auckland on July 31 and August 1.
• Top prize includes a 10-date performing tour of Europe.