The expansion of decentralized energy generation repeatedly reveals deficiencies in the IT security of market-leading hardware. The focus is again on the Chinese company Hoymiles, which, according to its own statements, serves around 20 percent of the European market for microinverters. These are installed in balcony power plants and smaller roof solar systems. Security researcher Benedikt Heinz, also known as Hunz, together with the Chaos Computer Club (CCC), has uncovered far-reaching security vulnerabilities: With simple means from the electronic junk box and little know-how, it is reportedly possible to manipulate, switch off, or permanently disable solar systems in the neighborhood while driving by.