MANILA, Philippines —Manila Electric Co. (Meralco) customers will have to tighten their belts as their power bills rise this month due to higher power generation costs. On Tuesday, Meralco said electricity rates this October would increase by P0.3191 per kilowatt-hour (kWh) to P15.0615 per kWh from P14.7424 per kWh in Sept. READ: ERC orders Meralco