Sri Lanka's electricity board hiked consumer rates by up to 275 percent, officials said yesterday, the second steep increase in months as the bankrupt island nation works to secure an IMF bailout.

An unprecedented financial crisis last year saw Sri Lanka's 22 million people suffer through months of food and fuel shortages, along with lengthy power cuts.

The government defaulted on its $46 billion foreign debt and is finalising a rescue package with the International Monetary Fund to restore its ruined finances.

"We had to raise electricity charges to be in line with IMF conditions that we cannot get handouts from the treasury," energy minister Kanchana Wijesekera told reporters.

"We need to generate revenues to cover our costs."

Households will now pay at least 30 rupees (eight cents) per kilowatt-hour for electricity, a figure in line with average tariffs in neighbouring India.

The 275 percent increase in the lowest tariff follows a 264 percent hike that came into effect six months ago. 

Wijesekera said the rate hikes would allow Sri Lanka's state electricity monopoly to end the 140-minute daily blackouts currently in force around the island.