Even small scale needs stability in government support because you need to invest in the grid and energy storage to handle the excess in power generated by solar panels during the day.
But you can also invest in the grid and have excess energy shifted to other regions that can make use of it.
"Investing in the grid" means expanding capacity in order to meet increased electricity demands as electric vehicles replace fosil fuel vehicles and increasing switching and grid intelligence to better handle a more distributed supply and demand.
More solar + more batteries and thermal storage + better grid are all things that grow hand in hand.
Of course investment in the grid is required to meet large scale population demands.