Cost of power from Independent Power Producers (IPP) also increased by P0.2814 per kWh due to the annual scheduled maintenance outage of Quezon Power for the whole February supply month and continued depreciation of the peso, Meralco noted. "The share of IPP purchases to Meralco's total requirement this month was 35 percent," it said. Charges from plants under Power Supply Agreements (PSA) decreased by P0.3634 per kWh due to improved average plant dispatch. PSAs provided 46 percent of Meralco's total energy requirement. The transmission charge to residential customers increased by P0.0503 per kWh on higher ancillary service charges billed by the National Grid Corporation of the Philippines (NGCP). "Correspondingly, taxes and other charges went up by P0.1583 per kWh this month," Meralco noted. The company's distribution, supply, and metering charges have remained unchanged for 32 months, after these registered reductions in July 2015, it said.