Of this, nearly 100 lakh units are generated through its existing windmills, while the remaining 500 lakh units are purchased from APSPDCL (AP Southern Power Distribution Company Limited). The new turbine is expected to generate an additional 16 lakh units annually, reducing the annual power purchase requirement to around 484 lakh units. The devasthanam already operates nine wind turbine generators of different capacities at Tirumala. According to the board resolution, the proposed wind turbine would generate more electricity per acre than a solar power plant. As per the approved proposal, the donor will supply, install, commission, operate, and maintain the wind turbine free of cost throughout its 25-year life.