I have been intrigued by the idea. I went into a local bike shop and they told me, 'Don't bring an electric bike here, we don't understand them'
I thought that this was a bit short sighted on their part, there are plenty of electricians about and an enterprising bike shop owner could easily ask an electrician to call part time. Bear in mind, most troubles will be ordinary bicycle problems, not electric.
As far as the electric side of things go, it is mainly a matter of diagnosis, but good workshop manuals are not really available. But when you think about it, the electric side is a motor, a controller, throttle, pedelec system and battery.If the normal electrical readings were available, diagnosis would be quick. Whilst most on here would set out to repair these components, a commercial operation at LBS level would probably just replace defective components in the same way that motor mechanics do.