Without corresponding improvements in Lithium battery technology and production capacity (and lower costs for this technology), solar will never be base load capable. 

The technology is improving, but we are not there yet. 

As a BC resident, I can say that Solar is close to being cost effective as we can use the grid as our battery to keep costs down. But that isn't 'base load capable', it is using BC's hydro reservoirs as the 'battery'.