This is also quite dependent on the microclimate: there's a number of places in the south of BC that get radically different levels of solar radiation. Kelowna for instance would be far better than North Vancouver for a solar setup.

By and large most of BC wasn't economic enough to justify solar as a replacement for grid power, but I haven't checked those numbers in a while. We do have relatively cheap hydro power, so there's not a hugely strong incentive either. There's other reasons that might justify an install however, especially for off-grid folks.