How much sun can be fed into the grid?

Vietnam is one of the five countries most affected by climate change worldwide. At the same time, the energy demands of the high-consuming middle class are growing day by day. Vietnam wants to be climate-neutral by 2050. For that its industry needs to become greener, for which large-scale solar parks have been built to satisfy the new hunger for energy. But the solar boom appears to have exhausted itself. Now the focus is on non-commercial solutions: small systems on the roofs of households and offices. What opportunities does solar roof funding offer, and can we expect new impulses from it?