Kalayaan Pumped Storage Power Plant was built in 1982, it is the first of its kind in Southeast Asia and the only pumped storage facility in the Philippines. Kalayaan I was upgraded from 150 MW to over 168 MW. Kalayaan II was built with a guaranteed capacity of 174.3 MW The Kalayaan Complex serves as large peaking facility for the Luzon Grid but its primary function is to provide frequency regulation and control. In the daytime, a period with a high demand for power, the plant generates electricity. But at night, a period of low demand, Kalayaan pumps water from Laguna Lake into Caliraya, an ingenious way of storing energy Download Brochure