"I thought it was a very good idea. My wife is a physio and said standing up was very good for circulation."
Mr Long has been working on the prototype with mechanical engineer Dave Howes for about three years. Mr Howes said new stand-up electric wheelchairs could cost up to $25,000 and their modular design could be produced for less than half that price with current technology.
Mr Long said watching his elderly mother trying to get around the house and live a normal life prompted him to continue with the project.
"Simply making a cup of coffee would take her half an hour. I almost gave it all away until I really analysed the problems."
Without giving away the key to the new design, Mr Long said they believed it was totally unique and could halve the cost of similar wheelchairs already on the market. Erik can operate both indoors and outdoors and on rough ground but not on soft outdoor surfaces-yet.
"Because it's modular we can adapt it to any person," Mr Long said.
"It amazes me there's nothing out there like this, and we are doing something good for people too. "It takes a lot of time and effort to get to this point, now we are at the stage we need further funding to perfect the design and market it around the world."