SMA stops production of these inverter types at the end of April 2015 (STP 15000TLEE, STP 20000TLEE, STP 17000TL). Last orders will be accepted at the end of February 2015. It is recommended to use to following alternative types: FLX 15, FLX 17, Tripower 20000TL-30 and Tripower 15000TL-10.