So in lieu of innovation the solution is to tax competitors? That doesn't exactly sound like a sustainable path forward - what would be the incentive for domestic manufacturers to innovate the price downward if there's a safety net preventing any real competition to force them to do so?
They do compete against each other. They also compete with other forms of energy generation. Did you think there was only a single company in USA that made solar panels?
Not sure how you came to that conclusion that I believe one company manufactures panels in the U.S. but, for the sake of argument, if 30% more than foreign solar panels is the best price we can come up with than 1) that's not working and 2) a tariff will not solve pricing it only removes competition. Again, if they do not have to worry about lower-price competition, what incentive would U.S. manufacturers have to lower prices aside from a lack of demand? You seem to only be concerned about manufacturers in your statement and not the general public using these panels.