A green-thinking software company in Andhra Pradesh, Signion Systems, has acquired a 0.75 kW wind turbine and designed a power converter for it. The Zephyr-1000 converter can provide conditioned power at 230 V and 50 Hz, according to the company. With wind speeds of 6 m/s during the monsoon season, the converter can deliver 200 W of power. With the average wind speeds of 4.5 m/s prevalent at Signion's factory, the converter delivers 100 W of conditioned power. The diameter of the wind generator's rotor blades is to be increased from the current 3.3 metres to 3.6 metres so that power output can be raised by 20%. Signion expects to complete testing of the wind generator system by the end of this year. Signion uses water collected through rain water harvesting for cooling its office, as well as solar photovoltaic panels and the wind generator to meet its electricity requirements. The company also plans to establish a 230 V AC power bus to which the solar photovoltaic systems and the wind generator will be connected. Computers and other devices will then draw power from this bus. Signion's clean energy systems have cost $15,555 to set up and meet about 17% of its power requirements. Power from the systems costs about $0.16/kWh.