MANILA (AFX-ASIA) – Manila Electric Co expects its tariff hike to boost revenue by 1.9 billion pesos annually, Meralco chief finance officer Daniel Tagaza said after the company got a provisional authority from the Energy Regulatory Commission (ERC) to raise its tariff by 0.12 pesos per kilowatthour. (US$1=55 peso). The rate hike, the second for…