The CPS SCA20KTL-DO and SCA25KTL-DO grid-tied PV inverters are tranformerless, three phase products. The maximum input voltage is 1000V which makes the configuration more flexible. Patented 3-level control algorithm and thermal design provide 98.3% maximum efficiency and 97.8% Euro efficiency. The new generation three phase string inverters are designed with the DC switch integrated. And provide an option for fuse which designed in the wiring box.