If you do that then the price of Solar PV will skyrocket back up. The key reason we've seen Solar PV prices plummet is because we've seen an increasing amount of manufacturing move to China, now 80% of solar PV are manufactured their.

It takes a tremendous amount of resources and energy to make solar pv and the only way to do it cheaply is to do it someplace that doesn't mind burning lots of coal to extract and process the necessary resources to build them.

Though to be fair, high tariffs that reduced Chinese production would hurt the global economy, which is the only demonstrated method we've seen to reduce emissions. This could be the best path way to improving emissions, but I suspect many people would be unhappy with consequences.