Reacting to the DERC's decision, the Aam Aadmi Party Government said it will ask the regulator to review the hike as it will put additional burden on the consumers.
The hike will be effective from Monday.
DERC chairman P D Sudhakar told PTI that the Power Purchase Adjustment Cost (PPAC) surcharge has been restored following a directive from the Appellate Tribunal for Electricity (APTEL).
The consumers in the New Delhi Municipal Corporation areas will have to pay 5 per cent surcharge.
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Delhi's Power Minister Satyendar Jain said the government will ask DERC to review the order. Sudhakar said the surcharge will be for last two quarters as well as the current quarter.
In an order on May 28, the APTEL had asked the DERC to pass on Power Purchase Adjustment Cost (PPAC) for two quarters (from October 2014 to March 2015) to the private power distribution companies within three weeks.
The DERC had introduced PPAC in 2012 to help the private power distribution companies recover additional cost on account of increase in coal and gas prices. Delhi gets power from a number of gas and coal-based power generation plants.