A hands-on form of solar power has electrified the U.S. in the past year. Last year, the Republican-controlled legislature in Utah became the first to legalize plug-in solar. In just the last few months, 10 more states passed plug-in solar laws, and several more are still considering bills. The German balcony solar veterans The only companies with direct experience navigating the plug-in solar market got that head start in other countries. The company has already gone through three iterations of microinverters and eight iterations of solar panels.