Solar Inverter Sub Station, conveniently termed as SISS is a prefabricated, pre-wired assembly consisting of Inverters and HT/LT equipment composite power block complete with both DC and AC power cabling with suitable termination and equipped with components (Optional for With and Without Transformer), all mounted in a thermally insulated enclosure. The SISS is specially designed and Simulation tested according to the IEC 62271-202 standard relevant requirements and have the options starting from 1MW to 5MW.