Some parts of a solar installation can be done by anyone, but anything involving electricity should be handled by an electrician. Both on and off-grid solar PV systems need to be installed by a Red Seal electrician and inspected by Nova Scotia Power or the local electrical inspectors.
In general, racking and mounting panels, building a ground mount frame (depending on local building code), trench digging (if required), can all be done by someone with the skills and safety equipment/certifications to do so.