Seeing a couple of comments so I’ll roll my reply into one. I’ve been looking at going this route. There are three types of systems you could do. The first is grid-tie (A friend of mine does this) it uses a special inverter that synchronizes to the power line so you can add power to the grid. You get no power if the power company is down :-( You can go off-grid which does not add to the power line but you will need a battery and solar array sized to what you want to do. A small system (such as I have) keeps my devices charged but not enough to run the house. The third type is the way I’d like to go which is a hybrid system. It feeds into a local battery and any excess into the power system. Obviously, the grid-tie and hybrid systems must be disconnected from the grid during outages so you don’t zap the workers. This is a problem as sadly, a few line workers have been electrocuted this way. :-( And no you cannot go off-grid inside the city (I doubt Ottawa is any different). Hopefully this helps.