Power chiefs 'must reveal profits': Energy companies facing demands from MPs to provide breakdown of figures The Energy and Climate Change Committee want suppliers to disclose costs Would include wholesale energy prices and green levies Also asked to reveal the profit they make from a typical domestic customer By Helen Loveless and Paul Cahalan Energy companies are facing demands from MPs to provide an unprecedented breakdown of commercially sensitive information about costs and profits - but the figures they provide are set to be kept from the public. The Energy and Climate Change Committee, which last week grilled representatives from power firms about their prices, has now written to suppliers to request the precise details of their costs, including wholesale energy prices, green levies and distribution costs. They are also being asked to give exact numbers for the profit they make from a typical domestic customer. Hearing: The Energy and Climate Change Committee grilled representatives from power firms about their prices last week The figures are likely to be regarded by the energy groups as highly sensitive, and sources said they would expect MPs to keep the most sensitive information secret. One source said: "We will have to mark it all as commercially confidential." The committee's demand comes as Ministers are due to meet bosses from the Big Six on Tuesday. The meeting follows The Mail on Sunday's revelation that companies were earning interest by "stockpiling" up to an estimated £2 billion from customers who had overpaid by direct debit. The Mail on Sunday understands that Ministers will tell the firms to make an automatic refund. Energy Minister Greg Barker said: "I am clear the companies have to act on the stockpiling issue. We want to agree a standard. Demand: Energy Minister Greg Barker said he is clear companies have to act on the stockpiling issue and that the standard would have to be agreed