The chief executive of npower has said he wants to dispel myths about the energy industry in a bid to restore trust in the under-fire sector.
Mr Massara said the actual unit price of energy in the UK was one of the lowest in Europe, but claimed bills are high because British houses waste so much energy.
In the supplier's second "Energy Explained" report, the chief executive said: "At times during the debate on energy, facts have been in short supply, but we urgently need to dispel some myths to restore trust in the energy industry.
"Suppliers control less than 20% of a bill and I want to shine a light on all the different aspects of energy, particularly to reassure my customers that there is no hidden profit. We made a 3.2% margin in our retail business in the first nine months of 2013.
"Over the same period our power stations were struggling to recoup the hundreds of millions of pounds in investment required to build them, and made a loss of £59 million."
Earlier, industry regulator Ofgem accused npower of "misleading" consumers with "incorrect" data on network costs.
More top news
David Cameron sets out his case for British jets and drones to strike so-called Islamic State targets in Syria in an address to the Commons.
A drink-driver who "destroyed the lives" of two mothers was allowed to have his curfew lifted so he could go on a foreign stag party.
Demonstrators have blockaded the entrance tunnel to Heathrow Airport in apparent protest at plans to build a third runway.