Plug-in solar has been legal for over a decade in Germany with over 1M+ installations now. Apparently they have had no significant record of safety incidents like the ones people are concerned about here. Comparatively, there appears to be many more reports of safety incidents for large battery power stations that are popular nonetheless and became legal without much controversy. So, based on apparent safety records, it seems odd that plug-in solar is not legal (except Utah) while large power stations are. Given how hard POCO's are fighting plug-in solar in various states, it seems they would have publicized any actual safety problems caused by plug-in solar.