Fronius 7035FS - Shade Cover for Symo 10-24kW. Powder-coated aluminum is designed to reduce the heat of roof-mounted inverters. To ensure peak inverter performance, Fronius provides a light-weight and easy-to-install shade cover as part of the Fronius Rooftop Solution, keeping the inverter’s temperature low and performance high. The Fronius Shade Cover can also be retrofitted to existing installations.